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Publication Number: 1075-120
Rev. G - 7/98
ROCHESTER INSTRUMENT SYSTEMS
MICROLARM AN-3196B
LED ANNUNCIATOR
OPERATING & SERVICE
MANUAL
Paul Ernst
Signature
Not Verified
Digitally signed by
Paul Ernst
DN: cn=Paul Ernst,
o=RiS,
ou=Engineering
Services, c=US
Date: 2001.10.09
07:26:39 -05'00'
ROCHESTER
Digitally signed by Engineering Services
Date: 2001.10.09 08:57:14 -05'00'
Reason: Document is released
APPROVED
TABLE OF CONTENTS
INTRODUCTION
. . . . . . . . . . . . . . . . . . . . . . . . . TOC-3
SECTION 1 - RECEIPT & INSTALLATION .
1.1
RECEIPT . . . . . . . . .
1.2
MOUNTING . . . . . . . .
1.2.1 PANEL MOUNTING . .
1.2.2 WALL MOUNT . . . .
1.3
ELECTRICAL CONNECTIONS .
1.3.1 TERMINAL BLOCK TB1
1.3.2 TERMINAL BLOCK TB2
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. 1-1
. 1-1
. 1-3
. 1-3
. 1-6
. 1-8
. 1-8
1-11
SECTION 2 - SYSTEM DESCRIPTION . .
2.1
GENERAL . . . . . . . .
2.2
SEQUENCE CONTROL MODULE
2.3
COMMON SERVICES MODULE
2.4
SYSTEM BUS . . . . . .
2.4.1 SERIAL DATA BUS .
2.4.2 FEEDBACK DATA BUS
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2-1
2-1
2-3
2-4
2-6
2-7
2-8
SECTION 3 - CONTROLS & OPERATION . . . . . . .
3.1
PUSH-BUTTON SWITCHES . . . . . . .
3.2
STANDARD OPERATIONS . . . . . . . .
3.3
OPTIONAL VARIATIONS . . . . . . . .
3.3.1 PUSH-BUTTON SWITCH INTERLOCK
3.3.2 AUTO SILENCE . . . . . . . .
3.3.3 NON-FIRST-OUT OPTIONS . . . .
3.4
TEST PROCEDURES . . . . . . . . . .
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3-1
3-1
3-3
3-4
3-4
3-4
3-4
3-5
SECTION 4 - SEQUENCE CONTROL MODULE .
4.1
DIP SWITCHES . . . . . .
4.2
TECHNICAL DATA . . . . .
4.3
SPECIAL APPLICATIONS . .
4.3.1 CONTACT SHARING . .
4.3.2 ALARM RESPONSE TIME
4.3.3 HOST SYSTEM INPUTS
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4-1
4-2
4-5
4-8
4-8
4-8
4-9
SECTION 5 - COMMON SERVICES MODULE . . . . . . . . .
5.1
OPTIONS . . . . . . . . . . . . . . . . .
5.1.1 FLASH RATE . . . . . . . . . . . .
5.1.2 AUDIBLE AND RINGBACK ALARM CONTROL
5.1.3 PUSH-BUTTON SWITCH INTERLOCK . . .
5.1.4 OPTIONAL RELAY CONTACT USE . . . .
5.2
POWER SUPPLY CONNECTIONS . . . . . . . .
5.3
TECHNICAL DATA . . . . . . . . . . . . .
5.4
OUTPUT RELAYS . . . . . . . . . . . . . .
5.5
CONFIGURATION CHANGES . . . . . . . . . .
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5-1
5-2
5-3
5-3
5-3
5-4
5-5
5-6
5-7
5-8
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SECTION 6 - MAINTENANCE . . . . . . . . . . . . . . . . . . . . . 6-1
6.1
TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . 6-3
TOC-1
Rochester Instrument Systems
LIST OF APPENDICES
APPENDIX
APPENDIX
APPENDIX
APPENDIX
APPENDIX
APPENDIX
A
B
C
D
E
F
ISA SEQUENCE CHARTS
ORDER CODE DEFINITION AND SPECIFICATIONS
SPARE PARTS
ELECTROSTATIC DISCHARGE
REPAIRS AND WARRANTY
ENGINEERING DRAWINGS
LIST OF FIGURES
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
2-1
3-1
4-1
7-1
7-2
7-4
ANNUNCIATOR FRONT AND REAR VIEWS . . . .
PANEL MOUNT DIMENSIONS . . . . . . . . .
WALL MOUNT DIMENSIONS . . . . . . . . .
TB1 CONNECTIONS . . . . . . . . . . . .
CONNECTIONS FOR TERMINAL BLOCK TB2 . . .
CONNECTIONS FOR REFLASH OUTPUTS . . . .
AUDIBLE DEVICE CONNECTIONS . . . . . . .
REMOTE PUSH-BUTTON SWITCH CONNECTIONS .
SERIAL DATA AND FEEDBACK BIT ASSIGNMENTS
ANNUNCIATOR KEYPAD . . . . . . . . . . .
DIP SWITCH FUNCTIONS . . . . . . . . . .
AN-3196B-MOD BACKPLANE . . . . . . . . .
CONNECTION DIAGRAM FOR SERIAL CABLE . .
SWITCH S5 SETTINGS . . . . . . . . . . .
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. 1-4
. 1-5
. 1-6
. 1-9
1-11
1-12
1-12
1-14
. 2-7
. 3-1
. 4-2
. 7-3
. 7-4
. 7-6
LIST OF TABLES
Table 2-1
Table 5-1
SYSTEM BUS WIRE ASSIGNMENTS . . . . . . . . . . . . 2-6
COMMON SERVICES MODULE OPTIONS DIP SWITCH 1 . . . . 5-2
TOC-2
AN-3196B Annunciator
INTRODUCTION
INTRODUCTION
The Rochester Instrument Systems, Model AN-3196B MicroLarm
Annunciator is a self-contained, LED annunciating system for monitoring and
indicating the conditions of up to twelve inputs. The unit is multimicrocomputer based and is designed to provide long term, efficient
operation.
This manual gives detailed information on installation, operation, and
maintenance of the system. We recommend that everyone involved with
installation or maintenance of this equipment read and be familiar with the
entire manual. Operating personnel should read and be familiar with at least
"Section 3 - Controls & Operation".
The sections of this manual which deal with modifications and
maintenance assume a basic knowledge of servicing electronic equipment.
The installation section also assumes a basic knowledge of mechanical and
electrical maintenance skills.
Each Annunciator can be custom configured for a specific application.
"Appendix F" contains the Engineering Drawings for this specific
Annunciator. "Appendix A" shows the ISA Sequence Charts which are
pertinent to this equipment. "Appendix B" shows the MicroLarm Order
Code Specifications and "Appendix C" gives Spare Parts Information.
"Appendix E" gives information of parts returns and warranties. "Appendix
D" gives specific information pertinent to working with equipment which can
be damaged by Electrostatic Discharge.
Rochester Instrument Systems fully supports its systems with in-house
customer service and field service staffs. In addition, for a fee, Rochester
Instrument Systems can provide training programs for your personnel, startup assistance, and additional instruction manuals. Contact the factory for
further information.
TOC-3
Rochester Instrument Systems
TOC-4
AN-3196B Annunciator
RECEIPT & INSTALLATION
SECTION 1 - RECEIPT & INSTALLATION
The Rochester Instrument Systems, Model AN-3196B MicroLarm,
Self-contained, LED, Annunciator is a high-reliability, multi-microcomputer
based, 12-point, monitoring and signaling system. It utilizes microcomputer
technology to monitor field contact conditions. Alarm conditions indicated by
the monitored contacts are displayed by Light Emitting Diodes (LED's). In
addition, the Annunciator can activate audible alarms and auxiliary output
contacts.
C A U T I O N
ELECTRONIC DEVICES CAN BE DAMAGED IF DROPPED
OR IMPACTED. HANDLE WITH CARE.
1.1
RECEIPT
Inspect the shipment when the unit is first received. Check for any
opened or damaged containers. Check the shipment against the Packing
List or Bill of Lading and verify that the shipment includes all containers listed.
NOTE
REPORT ANY SHIPPING DAMAGES OR SHORTAGES
TO THE CARRIER AT THE TIME OF RECEIPT
.
Open each container and check the contents against its respective Packing
List. Inspect each of the components. Look for scratches or dents, loose or
dangling parts, or other obvious damage.
Each annunciator comes assembled as a unit. There are two modules
inside each unit, attached to the front faceplate. Make sure the faceplate
assembly is securely seated in the annunciator enclosure and the knurled
screw toward the bottom of the faceplate is tight. Check the Lamacoid
legend plates, used to label each LED, to make sure they are as specified by
1-1
Rochester Instrument Systems
your order. (Refer to "Appendix B - Order Code Definition" for model
definition.)
Report any damaged, missing, or incorrect items to:
CUSTOMER SERVICE DEPARTMENT
ROCHESTER INSTRUMENT SYSTEMS, INC.
255 North Union Street
Rochester, New York 14605 USA
Telephone: (716)263-7700
Fax: (716)262-4777
ROCHESTER INSTRUMENT SYSTEMS, LTD.
Schooner Court Crossways Business Park
Dartford, Kent
DA2 6QQ, United Kingdom
Telephone: (441) 322 287500
Fax: (441)322 282000
If you anticipate the need to return any or all of the components, save all
packing materials for re-shipment. Refer to the "Procedures for Factory Repair
and Return" in "Appendix E - Repairs and Warranty" for proper procedures
and addresses for returning goods.
1-2
AN-3196B Annunciator
RECEIPT & INSTALLATION
1.2
MOUNTING
The AN-3196B Annunciator is fully self-contained, including an optional
integral power supply. It is designed to be either panel mounted or surface
mounted with the optional surface mounting kit. The unit may also be mounted
in a NEMA Class 4 or Class 12 enclosure where severe environmental
conditions exist.
W A R N I N G
THE BACK OF THE ANNUNCIATOR ASSEMBLY HAS
MANY EXPOSED ELECTRICAL CONTACTS. WHEN
CHOOSING A MOUNTING LOCATION FOR THIS UNIT,
MAKE SURE THESE CONTACTS WILL NOT TOUCH
OTHER ITEMS AND THAT NO ONE WILL BE ABLE TO
ACCIDENTALLY TOUCH THESE CONTACTS WHEN THE
UNIT IS IN SERVICE.
1.2.1 PANEL MOUNTING
When choosing a location for mounting the AN-3196B Annunciator,
consider the physical size and weight of the unit and the environment of the
location as well as the visibility of the LED display. The chassis of the
annunciator measures 3.73" wide by 12.95" high by 5.87" deep (94.74 mm x 329
mm x 149.2 mm).
The unit weighs 9 lbs. (4.08 kg). It is designed to rest on the sill of the
panel cutout. Therefore, the material left, after the cutout is made, must be
strong enough to support the unit's weight without failing. The unit mounts with
panel clamps from the rear of the unit and all connections are made to the
terminal blocks at the rear of the unit. Therefore, the mounting location must
allow full access to the rear of the assembly.
1-3
Rochester Instrument Systems
Figure 1-1 Annunciator Front and Rear Views
1-4
AN-3196B Annunciator
RECEIPT & INSTALLATION
To mount the unit, first mark the cutout dimensions on the panel where
the annunciator is to be mounted. (Refer to Figure 1.2 for specific dimensions.)
Be sure to allow enough room around the cutout for the front mounting bezel to
miss any other components on the panel. Cut out the panel material.
The annunciator is shipped with the panel clamps mounted to the unit.
Remove these panel clamps from the annunciator and position the unit in the
cutout. From the rear of the unit, place the panel clamps into the notches at the
top and bottom of the annunciator. Finger tighten both clamps until the unit is
secured in the panel. Use a screwdriver to finish securing the unit.
Figure 1-2 Panel Mount Dimensions
1-5
Rochester Instrument Systems
1.2.2 WALL MOUNT
When the AN-3196B is to be wall mounted, a separate metal enclosure is
supplied for mounting. Mounting dimensions are 4.00" wide by 15.88" high by
8.90" deep (101.6 mm x 403.4 mm x 226.2 mm). With this enclosure, the
assembly weighs 15 lbs. (6.80 kg).
Determine where the annunciator is to be mounted and mark the location
for the four mounting holes for the enclosure brackets. (Refer to Figure 1.3 for
mounting dimensions for these holes.) The brackets are designed to accept four
#10 screws. If wall anchors are being used, each anchor should be suitable for
at least a 7-1/2 pound load. This will give a mounting-weight Factor of Safety of
2.
Figure 1-3 WALL MOUNT DIMENSIONS
1-6
AN-3196B Annunciator
RECEIPT & INSTALLATION
Insert the screws through the holes in the mounting brackets and fasten
securely to the wall. Remove the panel clamps from the annunciator and
position the unit in the opening in the enclosure. From the rear of the unit, place
the panel clamps into the notches at the top and bottom of the annunciator.
Finger tighten both clamps until the unit is secured in the enclosure. Use a
screwdriver to finish securing the unit.
W A R N I N G
ALL ELECTRICAL WIRING FOR THE ANNUNCIATOR
CONNECTS TO THE EXPOSED CONTACTS ON THE BACK
OF THE UNIT.
PROVISION MUST BE MADE FOR
ACCESS TO THESE TERMINALS TO MAKE THE WIRING
CONNECTIONS. HOWEVER, CARE MUST ALSO BE
TAKEN TO ASSURE THAT NO ONE WILL BE ABLE TO
ACCIDENTALLY TOUCH THE CONTACTS WHEN THE
UNIT IS IN SERVICE.
1-7
Rochester Instrument Systems
1.3
ELECTRICAL CONNECTIONS
All electrical wiring to the annunciator connects to the two terminal blocks
on the back of the unit. Field contact connections are made to Terminal Block
TB1 as shown in Figure 1.4. All other connections are made to Terminal Block
TB2 as shown in Figure 1.5. Refer to "Appendix F - Engineering Drawings"
for the specific wiring connection patterns for this annunciator. Also, refer to
"Section 4 - Sequence Control Module" and "Section 5 - Common Services
Module" for additional information on options and settings which can affect the
wiring connections.
This unit requires a proper ground. A factory installed jumper is provided
from the bottom terminal of Terminal Block TB2 to the chassis ground stud
between TB1 and TB2. Check to make sure this jumper is in place and secured.
Connect electrical ground to the chassis ground stud before applying power to
the annunciator.
W A R N I N G
THIS UNIT MUST BE PROPERLY GROUNDED.
FAILURE TO PROVIDE AND USE A PROPER GROUND
CONNECTION CAN RESULT IN DAMAGE TO THE
ANNUNCIATOR.
1.3.1 TERMINAL BLOCK TB1
Terminal Block TB1 has 18 terminals. 12 of these terminals are labeled 1
through 12 and are the connection points for the return side from each of the 12
possible input points. Each of these input points must be a normally open or
normally closed contact which is activated when the monitored point goes into
alarm.
1-8
AN-3196B Annunciator
RECEIPT & INSTALLATION
Figure 1-4 TB1 Connections
1-9
Rochester Instrument Systems
The Field Contact Voltage (FCV) is supplied by the six terminals labeled
"VA" through "VF" on Terminal Block TB1. This supply may be 24, 48, or 125
VDC. Refer to Figure 1.5 for identification of the proper supply and return
terminals for each of the field contact points.
Note optional Isolated/AC Input configuration, in which an AC or DC
voltage originating in the field is applied to the input terminals, with the
return side connected to "VF (RET)". As a variation of this, six mutually
isolated groups may be set up, having two inputs and one return terminal
each. Standard voltage levels which may be accepted are 120 VAC or
24, 48, or 125 VDC. See "Section 4 - Sequence Control Module" for
details on input circuit set up and operation.
Connect each of the field contacts to the appropriate terminals on
Terminal Block TB1. Refer to "Appendix F - Engineering Drawings" to
determine which device is designed to be monitored by each input point. Verify
that the Legend Plate for each input matches the field contact being connected
to that terminal.
W A R N I N G
IMPROPER LABELING OR CONNECTIONS COULD
RESULT IN DAMAGE TO THE DEVICES BEING
MONITORED DUE TO INCORRECT RESPONSE.
1-10
AN-3196B Annunciator
RECEIPT & INSTALLATION
1.3.2 TERMINAL BLOCK TB2
Terminal Block TB2 is used for all other external connections to the
annunciator. These outputs include Critical and Non-Critical Reflash, Critical
and Non-Critical Alarm Audible, and Ringback Audible. Devices or device inputs
controlled by these outputs connect to Terminals 6 through 15. Terminals 1
through 5 connect to remote push-button switches when these are utilized.
Terminals 16 and 17 connect to the prime supply voltage. Terminal 18 is a
factory ground connection.
Voltage to power external devices or device inputs may be supplied from
an external power source, or from the internal annunciator 24 VDC source. The
internal 24 VDC source is capable of providing 0.15 Amps. and is brought out to
TB2-4 (+24V) and TB2-14 (24V RET) for customer connections. TB2-4 is used
to power external push-button switches. The relay contacts are rated for 5A at
24 VDC/120 VAC, 3A, 240 VAC, or 0.1A at 125 VDC maximum.
Figure 1-5 CONNECTIONS FOR TERMINAL BLOCK TB2
The Critical and Non-Critical Reflash outputs can each be connected as
normally open or normally closed (see Figure 1.6).
1-11
Rochester Instrument Systems
Figure 1-6 CONNECTIONS FOR REFLASH OUTPUTS
The Critical/Non-Critical Alarm Audible and the Non-Critical/ Ringback Audible
are factory set as normally open or normally closed if specified by the Customer
Order Specifications. If not specified, these contacts are shipped as normally
open. The contacts can be changed as required (see Figure 1.7).
Figure 1-7 AUDIBLE DEVICE CONNECTIONS
1-12
AN-3196B Annunciator
RECEIPT & INSTALLATION
Connect each of the outputs to their proper terminals. Refer to "Appendix F Engineering Drawings" for the correct terminal connections for this
annunciator. Also, see "Section 5 - Common Services Module" for a
complete description of the output options and how they can be altered.
The annunciator is supplied with an integral, membrane switch pad for
push-button switch control. However, there are occasions when it is desirable to
have the push-button switches at a location which is remote from the
annunciator unit. When this is necessary, the remote push-button switches are
connected to the terminals on Terminal Block TB2 as shown in Figure 1.8.
There are five possible supply voltages to the AN-3196B annunciator:
120 VAC, 240 VAC, 24 VDC, 48 VDC, and 125 VDC. Each annunciator is
designed for a specific prime supply voltage and different internal modifications
must be made for each prime supply voltage. When 24 VDC supply voltage is
used, this supply voltage is used directly within the unit.
When 125 VDC or 48 VDC supply voltage is used, an invertor power
supply produces the proper internal voltage. When 120 VAC or 240 VAC supply
voltage is used, two transformers, connected in parallel or series, provide the
proper internal voltage.
Using a different prime supply voltage will cause damage to the unit. If a
change in prime supply voltages is desired, the annunciator should be returned
to the factory for alterations. Refer to the Customer Order Specifications and
"Appendix F - Engineering Drawings" for the design voltage of this unit.
Connect the proper prime supply voltage to Terminals 16 and 17. If the
prime supply voltage is 24, 48, or 125 VDC, make sure the positive side is
connected to Terminal 16. It is also important to note that, when the prime
supply voltage is 24 VDC, only non-isolated 24 VDC is available for the Field
Contact Voltage. For power sources other than 24 VDC, the Field Contact
Voltage is isolated from the prime power and may be either 24 VDC or 125 VDC.
1-13
Rochester Instrument Systems
Figure 1-8 REMOTE PUSH-BUTTON SWITCH CONNECTIONS
1-14
AN-3196B Annunciator
SYSTEM DESCRIPTION
SECTION 2 - SYSTEM DESCRIPTION
The Rochester Instrument Systems, Model AN-3196B Annunciator is a
multi-microcomputer based system used to centrally monitor up to twelve field
conditions. The operations are based on proprietary microcomputers which are
incorporated into two modules. These modules provide the interface for the
inputs, determine the sequence of operations, and generate various output
signals.
The AN-3196B Annunciator will monitor conditions from any device which
can actuate a contact or produce a voltage (24/48/120/125: DC or AC). A few
typical applications would include monitoring pressure sensing devices, flow,
temperature, door contacts, vibration sensors, relay contact closure, levels, limit
switches, speed, and process sequences. The full list of possible uses is
unlimited.
2.1
GENERAL
The following is an abbreviated general description of the AN-3196B
Annunciator. For complete details on this specific unit, refer to the Customer
Order Specifications and to "Appendix B - Order Code Definition and
Specifications".
INPUTS:
May be in any one of the following configurations:
a)
1 to 12 sets of dry contacts; each may be normally open or
normally closed. One Field Contact Voltage terminal is provided
for every two input terminals.
b)
1 to 12 voltage inputs (individual inputs may have voltage normally
present or absent). One terminal provided for common voltage
return.
c)
Same as (b), but inputs may be distributed across six mutually
isolated groups of two inputs each, having one voltage return each.
Note: The current required for each input is approximately 1.5 mA.
2-1
Rochester Instrument Systems
OUTPUTS:
a)
1 LED indicator per input point.
b)
Relay contacts for Critical/Non-Critical Audible Outputs,
Critical/Non-Critical Reflash Outputs, and Ringback Output.
c)
Optional remote mounted audible devices.
CONTROLS:
a)
Integral Membrane Switch Pad with "T" (Test), "A" (Acknowledge),
"S" (Silence), and "R" (Reset) push-button switches.
b)
Internal switches and solder-in jumpers.
2-2
AN-3196B Annunciator
SYSTEM DESCRIPTION
2.2
SEQUENCE CONTROL MODULE
Inputs are provided to the Sequence Control Module (SCM) in the form of
voltages which are switched on or off in the field, according to the status of the
devices switching them. The SCM monitors and detects changes in the status of
each input by sensing presence or loss of the corresponding voltage. The
microcomputer in the module responds by storing status information in its
memory, sending certain alarm status information to the Common Services
Module by way of the Feedback Bus, and activating the proper LED (Light
Emitting Diode) according to the specified sequence.
Each Annunciator can monitor up to twelve inputs. Switches on the
module allow the user to select each input as having normally open or normally
closed contacts (voltage normally present or absent). Switches also allow the
user to define each input as Critical or Non-Critical.
Each individual input may also be configured to respond as a First-Out
Alarm. If a process has several monitored points, it may be important to know
which point in the process caused the problem, even though several other points
may have subsequently gone into alarm. Configuring each of these points as
First-Out Alarms allows you to know which point went into alarm first. This
First-Out Alarm will have a different display than the other alarmed points.
2-3
Rochester Instrument Systems
2.3
COMMON SERVICES MODULE
The microcomputer of the Common Services Module (CSM) can be
considered the Central Processing Unit (CPU) for the Annunciator. Information
is received from the Sequence Control Module and the system push-button
switches. In response, signals are sent back to the Sequence Control Module
and to various output devices.
The push-button switches are the operator's means of controlling the
Annunciator System. Four push-button switches are used as operator inputs to
the system. The push-button switches are the "T" (Test), "S" (Silence), "A"
(Acknowledge), and "R" (Reset) push-button switches. If remote push-button
switches are used, they are connected to the Common Services Module using
Terminals 1 through 5 on Terminal Block TB2.
The Test push-button switch simultaneously simulates alarm inputs on all
input points. All points should display on alarm when this push-button switch is
pushed. In addition, all points configured for First-Out Alarm should be displayed
as First Alarms. After the Test push-button switch has been pressed, the other
annunciator push-button switches are used to test the balance of the system
operation.
The Silence push-button switch is used to turn off all audible alarms. It
does not affect the status of the visual display. It does not reset the alarm status
memory.
The Acknowledge push-button switch signals the operator's recognition
of a new alarm. It causes a transition in the visual display from the Alarmed to
the Acknowledged state and will silence any active audible alarm.
The Reset push-button switch causes the display to return to the Normal
state from an Acknowledged state in manual reset sequences. If the unit has a
Ringback Sequence, the push-button switch is used to acknowledge the
automatic Return-to-Normal state. (A Ringback sequence is one in which
another audible alarm sounds, accompanied by another visual display, when the
system returns to normal.)
The Common Services Module also controls various output relays. There
are four relays available and six possible output types. The Annunciator System
can have up to two audible alarms from the three types available: Critical
Audible, Non-Critical Audible, and Ringback Audible. The two audible alarms
can have different devices so the type of alarm can be determined by the sound.
The system also has two Reflash Relays for driving remote Annunciators.
One of these is used for Critical-designated points and one for Non-Critical
points. In place of either of the Reflash outputs, the system could be set up with
a Power Monitor. This circuit would indicate if there is a loss of logic power.
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AN-3196B Annunciator
SYSTEM DESCRIPTION
Options are factory set based on the order specifications. Refer to
"Section 5 - Common Services Module" for detailed information on these
options. Refer to the Customer Order Specifications and "Appendix F Engineering Drawings" for details on your system.
The Common Services Module also supplies information to the Sequence
Control Module by way of the Serial Data Bus. This consists of the flash rates,
push-button switch status and the First-Out Blocking Bit. (First-Out Blocking
prevents Subsequent Alarms from displaying in the same manner as the First
Alarm.)
DIP switch assemblies on the Common Services Module select various
options for the Annunciator. These options include Optional Flash Rate,
Automatic Silence, Push-button Switch Interlock, and Pulsed Audible Alarm
options. The selections affect all twelve inputs.
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2.4
SYSTEM BUS
The System Bus is carried between the Common Services Module and
the Sequence Control Module by means of a flat ribbon cable. The bus provides
a unified means of interconnecting the two modules so that synchronization of
related functions may be accomplished. The wire assignments of the bus are
listed in Table 2.1 below:
Table 2-1 SYSTEM BUS WIRE ASSIGNMENTS
PIN NO.
DESCRIPTION
5
SERIAL DATA OUT
4
1,15
6
3,7,14
2,10-13,14
8
9
RESET
+5V
FEEDBACK DATA
SPARE (UNUSED)
LOGIC COMMON
FIELD CONTACT VOLTAGE SUPPLY
FIELD CONTACT VOLTAGE RETURN
The two data buses -- Serial Data and Feedback Data -- provide
continuous control and status information throughout the system. They are
logic-level buses. They switch back and forth from a logic low level (near 0V) to
a logic high level (near +5V). Each bus provides a repetitive sequence of data
bits, each of which is essentially a high or low level on the bus, for a specific
period of time. Therefore, an oscilloscope is required to monitor these buses.
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AN-3196B Annunciator
SYSTEM DESCRIPTION
2.4.1 SERIAL DATA BUS
The Serial Data (SERD) output from the Common Services Module is a bit
stream consisting of information to control flash rates, push-button switch status,
First-Out blocking bus, and synchronization of all microcomputers in the
AN-3196B Annunciator. Figure 2.1 gives a schematic representation of the
Serial Data bit stream and its relation to the Feedback line.
Figure 2-1 SERIAL DATA AND FEEDBACK BIT ASSIGNMENTS
The Serial Data Bus is positive logic. A high electrical level (+5V) is a
logic "On" or "1". A low electrical level (0V) is a logic "Off" or "0". Each bit lasts
for 1.6 milliseconds (ms). The entire series repeats every 26 ms.
The first bit is "Frame Sync" and is always "On" (1). The second bit is a
space which is always "Off" (0). Next are the push-button switch bits: Test,
Acknowledge, Silence, Reset, and First-Out Reset. If a push-button switch is
activated, its corresponding bit will be "On" (1). If the push-button switch is not
activated, its corresponding bit will be "Off" (0).
The next bit, after First-Out Reset, is First-Out Blocking. This is a retransmission to the Sequence Control Module's microcomputers of the First-Out
Blocking bit on the Feedback Data bus. This bit is turned on by one of the
microcomputers when an input which is designated as a First-Out input goes into
alarm. It will force all other points set for First-Out sequence into Subsequent
Alarm mode instead of First Alarm mode.
The last two bits are the two Flash Sync bits (Flash 1 and Flash 2). They
are each set by the DIP switch positions on the Common Services Module to be
either a fast or slow flash rate. After a point has gone into alarm, the sequence
selected for that point will put the corresponding LED under control of one of
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these two flash rates. When the corresponding bit is "On", the LED will be on.
When the bit is "Off", the LED will be off.
2.4.2 FEEDBACK DATA BUS
The Feedback data bus is controlled by the Sequence Control Module. It
is "read" by the Common Services Module. The Feedback Data Bus is negative
logic. A low electrical level (0V) is a logic "On" or "1". A high electrical level
(+5V) is a logic "Off" or "0".
Any of the Sequence Control Module's microcomputers may force a bit
"On" (0V), but only "On". They may not force a bit "Off". This prevents a conflict
from some microcomputers trying to force a bit "Off" while others are trying to
force the bit "On". If the bit is not being forced "On", it will be held "Off" by a
biasing resistor.
The Feedback Data is synchronized with the Serial Data so that the timing
relationship will always be the same between the two. As with the Serial Data,
each bit lasts for 1.6 milliseconds (ms). The entire series repeats every 26 ms.
The first Feedback bit begins midway through the Test bit time frame of
the Serial Data. This is the Critical Audible bit. It goes "On" whenever a point
which has been designated as Critical goes into alarm. A Silence or
Acknowledge command will reset this bit.
The Alarm Audible bit operates the same way for inputs designated as
Non-Critical. The Ringback Audible bit is driven "On" upon a return-to-normal
conditions for Ringback sequences. This is reset by the Silence or Reset pushbutton switches. The audible bits control the audible devices through the
Common Services Module. The Common Services Module exercises some
intermediate control such as defeating the Alarm Audible while a Critical Audible
is in progress.
The audible bits are followed by the point-on-alarm bits for Non-Critical
and Critical points. These bits control the Reflash Relays on the Common
Services Module. Next is the First-Out blocking bit which is activated whenever
the first point of a First-Out group goes into alarm. This is retransmitted back to
the Sequence Control Modules on the Serial Data Bus.
The First-Out blocking bit is followed by a marker bit which is always "On".
Another pulse occurs toward the end of the cycle. This is a very short duration
timing reference pulse.
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AN-3196B Annunciator
CONTROLS & OPERATION
SECTION 3 - CONTROLS & OPERATION
The AN-3196B Annunciator is microcomputer based. As such,
sequencing is controlled by the microcomputers in the various modules. Options
may be selected at the time of purchase or set up during installation or servicing.
This makes the Visual Annunciator extremely easy to apply to various operating
requirements.
3.1
PUSH-BUTTON SWITCHES
The controls for the Visual Annunciator
consist of four push-button switches. These
are integrally mounted in the annunciator on
the annunciator faceplate, but may be
connected in parallel with additional remotelylocated push-button switches. The pads on
the annunciator are labeled with the first letter
of the switch label as indicated in Figure 3.1.
The push-button switches serve the following
functions (note possible exceptions under
"Optional Variations"):
Figure 3-1 ANNUNCIATOR
KEYPAD
T (TEST):
Press this push-button switch to momentarily simulate
abnormal process conditions on all alarm points. All
LED's will illuminate. All inputs configured as
First-Out alarms will illuminate with the First-Out
display. If some points have been designated
Critical, the Critical Audible will come on and remain
on following release of the Test push-button switch.
The Non-Critical Audible will be on only while the Test
push-button switch is depressed. If no Critical points
have been designated, the Non-Critical Audible will
come on and remain on after the Test push-button
switch is released.
S (SILENCE):
Pressing this push-button switch causes a sequence
transition which turns off all audible alarms. This
push-button switch does not affect the visual
indication or acknowledge the alarm.
A (ACKNOWLEDGE):
Press this push-button switch to acknowledge an
alarm. The displays will change indicating that the
operator is aware of the alarm condition.
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R (RESET):
Press this push-button switch to return the display to
its normal state after the alarm conditions have been
corrected. Where Ringback sequences are present,
this push-button switch silences the Ringback Alarm.
It also resets First-Out status so that a point which
came on alarm in the First Alarm mode will change to
Subsequent Alarm mode. This allows a new alarm to
again be displayed in First Alarm mode.
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AN-3196B Annunciator
CONTROLS & OPERATION
3.2
STANDARD OPERATIONS
When the Visual Annunciator detects a change in an input signal, it will
indicate an alarm on the display. There are four possible forms of visual display
illumination: steady, slow flash, fast flash and intermittent flash. Each of these
will have a particular significance which is user definable according to the
sequence selection. The operator should become familiar with each form of
illumination and what it means.
In addition to the visual display, an audible alarm may sound. This
audible alarm could have one of two sounds depending on whether the input has
been designated as a Critical or Non-Critical Alarm. The operator should
become familiar with the difference in sound between the two types of alarms.
After the audible alarm has been silenced, the actuation of another input
will cause the audible alarm to sound again. In this way, the Annunciator can
continue to monitor the other inputs and warn of changing conditions, even if the
first condition is not yet corrected.
Upon hearing an audible alarm, check the Visual Annunciator to
determine the cause of the alarm. Silence the audible alarm and take whatever
steps necessary to begin corrective action. If a First-Out signal is indicated, note
which display is so indicated and which additional points, if any, are in
Subsequent Alarm mode. Press the Reset push-button switch to change the
First Alarm display to a Subsequent Alarm display. If additional inputs are
actuated, the first of these will again show the First Alarm display.
After corrective action has begun, press the Acknowledge push-button
switch to change the alarm to the Acknowledged mode. The display will change
but will still be illuminated until the condition returns to normal.
When the inputs have returned to normal, press the Reset push-button
switch (required for manual reset sequences). The Visual Display illumination
will go out. If any input is still in an alarm state when the Reset push-button
switch is pressed, its display illumination will not go out.
The annunciator can have a Critical Reflash and a Non-Critical Reflash
output. The Reflash output will be open if there are no points on alarm in the
system. The first point on alarm will cause the Reflash Relay to close.
After silencing or acknowledging the alarm, any subsequent alarm will
cause the Reflash Relay contact to open for approximately 0.5 seconds and then
close again. The system must be silenced or acknowledged after each alarm.
After all points have returned to normal, the relay contact will open and remain
open until another alarm occurs.
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3.3
OPTIONAL VARIATIONS
There are several options which can be selected which will affect the
operating procedures for the Visual Annunciator. These options are part of the
ISA sequences which can be chosen from DIP switch assembly S4 on the
Sequence Control Module. (Refer to "Section 4 - Sequence Control Module"
and "Appendix F - Engineering Drawings" for further details on the specific
switches involved.) The following discussion indicates the changes to the
standard operations caused by these options:
3.3.1 PUSH-BUTTON SWITCH INTERLOCK
This option prevents the Annunciator from recognizing the Acknowledge
push-button switch input unless it is preceded by actuation of the Silence
push-button switch. When this option is chosen, the only allowable sequence of
push-button switches is Silence, Acknowledge, and Reset (if used). A new alarm
will re-initialize the push-button switch sequence.
3.3.2 AUTO SILENCE
This option allows for the automatic silencing of any audible alarm. After
approximately 30 seconds, the audible alarms will cease. The LED Display is
not affected. A new input actuation will cause the audible alarms to sound again.
3.3.3 NON-FIRST-OUT OPTIONS
For those ISA Sequences which do not utilize a First-Out response,
Switch positions 9 through 11 of S1 through S3 on the Sequence Control Module
provide additional options. These options include defeating the audible
response for alarm and ringback, steady display instead of flashing, and
disabling the Acknowledge function. These options can be individually selected
for each group of four inputs. Refer to Section 4.1 for details on selecting these
options.
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AN-3196B Annunciator
CONTROLS & OPERATION
3.4
TEST PROCEDURES
Start the system test procedure by pressing the Test push-button switch.
An abnormal process condition is simultaneously simulated on all inputs. All
points will be displayed on alarm. In addition, all points having a First-Out
configuration will be displayed as First Alarms.
Press each of the other push-button switches to complete the test
sequence. Observe the visual displays and audible alarms to determine if there
are any LED or circuit failures.
Hold the Test push-button switch down to cause all audible alarms,
except Ringback, to sound. Only the highest priority alarm will continue to sound
when the Test push-button switch is released. The Ringback audible alarm, if
used, is activated by depression of the Acknowledge push-button switch
following the release of the Test push-button switch.
W A R N I N G
THE TEST SEQUENCE MUST BE MANUALLY COMPLETED
TO ALLOW VISUAL DISPLAY AND AUDIBLE ALARMS
FOR ACTUAL ALARMS. DEPENDING ON THE SEQUENCE
CONFIGURATION SELECTED, THE OPERATOR MUST
ACTUATE THE ACKNOWLEDGE AND/OR RESET
PUSH-BUTTON SWITCHES.
During test sequence operations, Reflash Relay outputs will reflect only
actual alarm conditions. If an actual alarm occurs during the test sequence, the
display, audible alarm and First-Out order information is stored. As soon as the
test sequence is completed, the alarm condition will be initiated, even if the input
has returned to normal in the mean time. However, the Reflash signal for the
actual alarm will respond immediately, since it is not affected by the test
sequence operations.
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AN-3196B Annunciator
SEQUENCE CONTROL MODULE
SECTION 4 - SEQUENCE CONTROL MODULE
W A R N I N G
STATIC ELECTRICITY IS ALWAYS PRESENT ON YOUR
BODY AND CLOTHING. THEREFORE, YOU MUST
EXERCISE CARE WHEN HANDLING STATIC SENSITIVE
ELECTRONIC ASSEMBLIES AND DEVICES. IMPROPER
HANDLING CAN CAUSE AN EXCESSIVE
ELECTROSTATIC DISCHARGE (ESD) WHICH CAN
DAMAGE OR DESTROY INTEGRATED CIRCUITS,
SEMICONDUCTORS, OR OTHER STATIC SENSITIVE
DEVICES. FOR FURTHER DETAILS AND DISCUSSION
ON ESD AND APPROPRIATE HANDLING TECHNIQUES,
SEE THE APPENDIX ON ESD.
The inputs are provided to the Annunciator as the presence or absence of
a voltage at each input terminal. The Sequence Control Module acts as the
interface between the inputs and the balance of the Annunciator. It monitors the
inputs and causes a response corresponding to a specified sequence.
When the condition of a field contact changes from normal to alarm for
more than 30 milliseconds, the corresponding microcomputer recognizes it as a
valid contact status change. The microcomputer stores this information in
Sequence Control Memory. It then processes the data in accordance with the
selected ISA Sequence settings and other information supplied by the Common
Services Module.
The corresponding Annunciator LED (Light Emitting Diode) is activated.
Other related outputs may also be activated, depending on the options selected.
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4.1
DIP SWITCHES
Figure 4-1 DIP SWITCH FUNCTIONS
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AN-3196B Annunciator
SEQUENCE CONTROL MODULE
The voltage provided to each input terminal may be normally present
(Contact Normally Closed), or normally absent (Contact Normally Open). In
addition, the signal being monitored by each input may be considered as Critical
or Non-Critical. (There can be one audible alarm for Non-Critical inputs and a
second, different sounding, audible alarm for Critical inputs.) The input may also
be designated as part of a First-Out grouping.
There is an 8-position DIP (Dual In-line Package) switch assembly (S4)
and three 12-position DIP switch assemblies (S1, S2, and S3) on the Sequence
Control Module. Switch assembly S4 controls the ISA Sequence for the all
twelve inputs of the annunciator. Switch positions 1 through 6 on S4 are used to
select any of the possible ISA Sequences as shown in the chart in Figure 4.1.
The attributes of each of these sequences is shown in "Appendix A - ISA
Sequence Charts".
Input type selections are controlled by switch assemblies S1 (inputs 1
through 4), S2 (inputs 5 through 8), and S3 (inputs 9 through 12). Each switch
assembly controls the choice of normally open or normally closed, Critical or
Non-Critical, and First-Out or Non-First-Out for the four related inputs. Refer to
"APPENDIX F - SCM SCHEMATIC & ASSEMBLY DRAWING" for switch
assembly locations. Refer to “SECTION 6 - MAINTENANCE” for removal of
modules from the chassis and switch access.
Switch positions 1 through 4 on S1 control the choice of normally open
(NO) or normally closed (NC) for inputs 1 through 4 respectively. Switch
positions 5 through 8 on S1 control the choice of Critical or Non-Critical for inputs
1 through 4 respectively. Switch positions 9 through 12 on S1 control the choice
of First-Out or Non-First-Out for inputs 1 through 4 respectively.
Switch positions 1 through 4 on S2 control the choice of normally open
(NO) or normally closed (NC) for inputs 5 through 8 respectively. Switch
positions 5 through 8 on S2 control the choice of Critical or Non-Critical for inputs
5 through 8 respectively. Switch positions 9 through 12 on S2 control the choice
of First-Out or Non-First-Out for inputs 5 through 8 respectively.
Switch positions 1 through 4 on S3 control the choice of normally open
(NO) or normally closed (NC) for inputs 9 through 12 respectively. Switch
positions 5 through 8 on S3 control the choice of Critical or Non-Critical for inputs
9 through 12 respectively. Switch positions 9 through 12 on S3 control the
choice of First-Out or Non-First-Out for inputs 9 through 12 respectively.
Determine the conditions required for each input and set the DIP switch
positions accordingly. For example, if the input contact for Point #1 will be
normally open (voltage absent), set DIP switch position 1 on S1 to "OFF". If it is
a Critical alarm, set DIP switch position 5 on S1 to "ON". If it is part of a FirstOut grouping, set DIP switch position 9 on S1 to "ON".
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For those ISA Sequences which do not utilize a First-Out response (A, A4,
M, R, and R12), switch positions 9 through 11 on S1, S2, and S3 serve
secondary functions.
1.
Turn switch position 9 on S1, S2, or S3 to "ON" to
defeat the Audible Alarms and Ringback Alarms for
the four inputs controlled by that switch during both
alarm and test conditions. The Critical audible alarm
still functions normally.
2.
Turn switch position 10 on S1, S2, or S3 to "ON" to
cause the LED's for the inputs controlled by that
switch to come on steady instead of flashing.
3.
Turn switch position 11 on S1, S2, or S3 to "ON" to
disable the Acknowledge function for the inputs
controlled by that switch. The Acknowledge pushbutton switch will neither silence the audible alarm
nor affect the visual output until after the input returns
to normal. The Silence push-button switch will
silence the audible alarm.
Study "Appendix A - ISA Sequence Charts" to determine what output
and control functions will best suit your needs. Set switch positions 1 through 6
on S4 to obtain the desired ISA Sequence. Set switch positions 9 through 11 on
S1, S2, and S3 to configure each set of four inputs for any optional features
desired (Non-First-Out sequences only). Remember that the choices made on
the Common Services Module will also affect the outputs.
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AN-3196B Annunciator
SEQUENCE CONTROL MODULE
4.2
TECHNICAL DATA
The Sequence Control Module is built around three Motorola
microprocessors (Z1, Z2, and Z3). (Refer to "Appendix F - Engineering
Drawings".) These are Motorola Part Number MC68HC05C4P. Each
microprocessor serves an identical function for each of three groups of four
inputs to the annunciator. The balance of this discussion uses the first group
(with Z1) as an example. However, the other two groups are essentially identical.
Refer to the schematic diagrams for the corresponding component numbers in
these other groups.
Z1 is an 8-bit CMOS device with 31 bi-directional Input/Output (I/O) ports
in four groups (PA0 through PA7, PB0 through PB7, PC0 through PC7, and PD0
through PD5 and PD7), as well as several special-purpose ports. Z1 contains an
embedded program which assigns specific functions to each port and governs
the responses at the outputs to the combination of signals present at the inputs.
Z1 operates on +5 VDC and requires an average current of 2
milliamperes (2 mA) for internal processes. The +5 VDC is derived from 24V
system power. (Refer to Common Services Module Schematic and Assembly
Drawing in "Appendix F - Engineering Drawings" and to Section 5.2.)
Capacitor C1 absorbs electrical transients and is, by design, located close
to Z1. +5V is applied to pin Z1-40. The common connection (5V return) is pin
Z1-20.
Z1 has an internal clock oscillator. The frequency of the oscillator is
determined by the value of resistor R1. This value is selected to generate a
clock frequency of 1.2 MHZ. This wave form, when viewed on an oscilloscope at
pin Z1-38, has a period of 0.833 microseconds.
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Z1 has an internal reset function which enables it to automatically clear all
registers and begin processing in an orderly fashion when power is applied. The
reset signal at pin Z1-1 enables an external reset to be applied. The line over
"RESET" on the schematic means that this signal is low (0V) in the active state
and high (+5V) in the passive state. A common reset signal is directed to the
Sequence Control Module from the Common Services Module.
The Serial Data signal from the Common Services Module is connected to
the Interrupt Request (IRQ) input port Z1-2. Feedback Data is provided at port
PB0 (Z1-12), used here as an output port. It is inverted by Z4 and "OR" gated
with Feedback Data from Z2 and Z3.
The input wiring is connected to rear terminals which are part of the TB1
connector. This (like TB2) is a terminal block on the outside of the unit, and a
printed circuit board edge connector on the inside. Thus it provides direct
connection from rear terminals TB1- 1-18 to SCM pins J4- 1-18 (refer to SCM
Schematic & Assembly Drawing in Appendix F).
TB1- 1-12 (J4- 1,2,4,5,7,8,10,11,13,14,16,17) are field contact inputs.
TB1- VA-VF (J4- 3,6,9,12,15,18) are either voltage supply or voltage return
terminals, or are unused. In the standard configuration of Field Contact Voltage
(FCV) supplied to dry field contacts, these terminals provide the FCV
connections (one FCV terminal for every two field contact pairs). In the
Isolated/AC input version (input voltage sourced from field) for one group, TB1VF (J4-18) is used as the common return connection, and TB1- VA-VE (J43,6,9,12,15) are unused. In the Isolated/AC input version for six groups, TB1VA-VF (J4-3,6,9,12,15,18) provide one return connection each for the six groups
of two inputs each.
The SCM is set up for any one of the above three configurations,
according to the installation or omission of four solder-in jumpers in each of six
jumper arrays (one for every two inputs). These are JPA1, JPB1, JPC1, and
JPD1 for the first two inputs, through JPA6, JPB6, JPC6, and JPD6 for the last
two inputs.
In the following discussion of input processing circuitry, the components
associated with Input 1 are used as an example. For standard input
configuration (dry contacts), JPB1 and JPC1 are installed; JPA1 and JPD1 are
omitted. FCV is brought onto the SCM through ribbon cable connection J1-8.
Capacitor C6, connected to chassis ground, provides suppression of electrical
transients which may be brought in from the field wiring. FCV, from the SCM, is
connected to FCV supply terminal TB1- VA (J4-3) via JPC1. FCV Return is
brought onto the SCM through J1-9, and routed to the input circuitry through
JPB1, providing the return path.
For Isolated/AC input configuration (one group), JPA1 is installed, while
the other jumpers are omitted. This provides a return path to common return
terminal TB1- VF (J4-18), which is connected to the field voltage return side.
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AN-3196B Annunciator
SEQUENCE CONTROL MODULE
For Isolated/AC input configuration (six groups), JPD1 is installed, while
the other jumpers are omitted. This provides a return path to return terminal
TB1- VA (J4-3), which is connected to the field voltage return side for the first
two inputs.
The input voltage applied to TB1-1 (J4-1) produces a current through
Resistors R1A and R1B, Diode Bridge BR1, and Resistors R1C and R1D.
Resistor R1E acts as a shunt to prevent any spurious potential voltage from
building up and triggering an alarm while the true input voltage is absent. With
Resistors R1A, R1B, R1C, and R1D in place, the correct level of current will be
generated from an input voltage of 24V. Removing R1D sets up the circuit for
48V, while removing both R1D and R1A sets up the circuit for 125V.
Diode Bridge BR1 rectifies the current, so that the circuit may be activated
by AC, as well as DC of either polarity. The current then passes through
Resistor R1F, and through the Light Emitting Diode (LED) input of Optical
Coupler OC1. OC1 provides electrical isolation between the input circuitry and
the logic circuitry. It also facilitates isolation between inputs in the six group
configuration.
Current passing through this LED causes light to be emitted from it, which
activates the photo transistor output. This in turn switches +5V through R1H,
producing a high, or logic `1' level at input port PC0 of Z1. R1H in conjunction
with Capacitor C1A also provides an RC time constant of approximately 30
milliseconds. This serves as a filter, suppressing transients which may be
entering from the field wiring. R1G serves as a pull-down resistor, to maintain a
low, or logic `0' level at PC0 while OC1 is turned off. Ports PC1-PC3 similarly
monitor the status of the other three inputs.
Ports PB2 through PB7, PC6, PC7, PD0 through PD5, and PD7 are used
as inputs to monitor DIP switch status. The DIP switches select program
sequences and operating modes (refer to notes and tables on
Schematic/Assembly drawing). When a switch is open, the input is held high by
a 100K pull-up resistor. When the switch is closed, the input is forced low, to
Common. Strobe signals STRB1 AND STRB2 from PC4 and PC5, in conjunction
with diodes CR1C-CR4C and CR1D-CR4D, multiplex Data from eight DIP
switches (S1-1 through S1-8) onto four input ports (PD0 through PD3).
Ports PA0 through PA3, used as outputs, control FET's Q1A through
Q4A, which drive LED's LED1A through LED 4A respectively. Series resistors
R1J through R4J limit the +5V derived LED current to approximately 2
milliamperes.
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4.3
SPECIAL APPLICATIONS
There are several special applications possible with the Sequence Control
Module. These require modification to the module itself. Such modifications
should only be performed by knowledgeable personnel following proper
procedures for static protection.
4.3.1 CONTACT SHARING
At times it is necessary to share an input contact for the annunciator with
another device such as an event recorder. Due to internal connections in the
Sequence Control Module, it is possible to have voltages from the module feed
back to the other device. To prevent such an occurrence, it is necessary to
replace the bridge rectifiers with blocking diodes.
After removing bridge rectifiers BR1-12, install blocking diodes CR1A
through CR12A and return jumpers JR1-12 as shown on SCHEMATIC &
ASSEMBLY DRAWING IN APPENDIX F. The diodes are type 1N4004.
4.3.2 ALARM RESPONSE TIME
The Sequence Control Modules are factory set with an alarm response
time (pulse capture) of 30 milliseconds. This response time will prevent false
alarms due to transient electrical signals. This time can be decreased for a
faster alarm response time. Before doing this, however, you should consider the
possible consequences of false alarms.
In addition, it is possible to select optional response times of up to 30
seconds. Either type of change (faster or slower) to the response time requires
a modification to the Sequence Control Module. Refer to the tables on the
Schematic & Assembly Drawing in "Appendix F - Engineering Drawings" for
specific part numbers and part values and for diode polarities for each of the
possible options.
For a response time of from 70 milliseconds to 700 milliseconds, change
capacitors C1A through C12A to the appropriate valued capacitor. For a
response time greater than 1 second, change capacitors C1A through C12A to
the appropriate valued capacitor, change resistors R1H through R12H to 200K
ohm resistors, and install diodes CR1B through CR12B on the Sequence Control
Module. (See SCHEMATIC & ASSEMBLY DRAWING IN APPENDIX F for
location, type, and orientation of each component.)
4-8
AN-3196B Annunciator
SEQUENCE CONTROL MODULE
4.3.3 HOST SYSTEM INPUTS
The inputs to the AN-3196B Annunciator can be driven from a host
system instead of from field contacts. To drive the inputs from open-collector
transistor outputs on the host system, remove JPB1-6 and JPC1-6, and install
JPA1-6. Connect +24V from TB2 to VF(RET) on TB1. Refer to SCHEMATIC &
ASSEMBLY DRAWING in "Appendix F - Engineering Drawings" for specific
part locations.
To drive the inputs from 5V logic level outputs (CMOS or TTL) on the host
system, remove R(1-12)A, R(1-12)B, and
C(1-12)A. Add a wire jumper from the J4(1-12) side feedthru pad of R(1-12)A to
the unused feed thru pad connected to OC(1-12)-4. Refer to SCHEMATIC &
ASSEMBLY DRAWING in "Appendix F - Engineering Drawings" for specific
part locations.
4-9
Rochester Instrument Systems
4-10
AN-3196B Annunciator
COMMON SERVICES MODULE
SECTION 5 - COMMON SERVICES MODULE
W A R N I N G
STATIC ELECTRICITY IS ALWAYS PRESENT ON YOUR
BODY AND CLOTHING. THEREFORE, YOU MUST
EXERCISE CARE WHEN HANDLING STATIC SENSITIVE
ELECTRONIC ASSEMBLIES AND DEVICES. IMPROPER
HANDLING CAN CAUSE AN EXCESSIVE ELECTROSTATIC
DISCHARGE (ESD) WHICH CAN DAMAGE OR DESTROY
INTEGRATED CIRCUITS, SEMICONDUCTORS, OR OTHER
STATIC SENSITIVE DEVICES. FOR FURTHER DETAILS
AND DISCUSSION ON ESD AND APPROPRIATE HANDLING
TECHNIQUES, SEE THE APPENDIX ON ESD.
The Common Services Module (CSM) receives information from the
Sequence Control Module and the system push-button switches. In response,
signals are sent back to the Sequence Control Module and to various output
devices.
When one of the inputs goes into alarm, the Sequence Control Module
sends information to the Common Services Module along the Feedback wire of
the System Bus. The microcomputer on the Common Services Module receives
this data and generates the appropriate control signals to activate the selected
options. The LED will flash in synchronization with the selected flash rate (1 or
2) on the Serial Data Bus. If the point on alarm is the first point in a First-Out
group, the Common Services Module will send a First-Out blocking bit back to
the Sequence Control Module along the Serial Data wire of the System Bus.
At the same time, the Common Services Module sends information to the
appropriate output relay. The type of alarm (or possibly no audible alarm) is
determined by the options chosen on the Common Services Module as well as
by the sequence information received from the Sequence Control Module.
5-1
Rochester Instrument Systems
5.1
OPTIONS
There are seven switch-selectable options for the Common Services
Module. An 8-switch, Dual In-line Package (DIP) switch assembly (S1) on the
Common Services Module controls the options. Refer to SCHEMATIC &
ASSEMBLY DRAWING in "Appendix X" for the location of switch assembly S1.
The model number of the Common Services Module is AN-3187. This
model number can have various suffixes which indicate selected options. The
option selections and the corresponding suffixes are shown in the table below.
The standard configuration -- no suffixes --is switch positions 1 to 7 "OFF".
Switch position 8 is not used. The suffix is used when a switch is chosen to be in
the non-standard ("ON") setting.
Table 5-1
SWITCH
1
2
3
COMMON SERVICES MODULE OPTIONS DIP SWITCH 1
4
ON
FLASH 1 SLOW
FLASH 2 FAST
AUDIBLE ALARM SILENCED
AUTOMATICALLY AFTER 30 SEC.
PUSH BUTTON INTERLOCK
5
AUDIBLE ALARM PULSED
6
RINGBACK AUDIBLE ALARM PULSED
7
RINGBACK AUDIBLE OUTPUT USED AS
COMMON CONTACT OUT
SPARE
8
OFF
FLASH 1 FAST
FLASH 2 SLOW
NO AUTOMATIC SILENCE
SUFFIX
F1
F2
AS
NO PUSH BUTTON
INTERLOCK
AUDIBLE ALARM
CONTINUOUS
RINGBACK AUDIBLE
ALARM CONTINUOUS
RINGBACK AUDIBLE
ALARM NORMAL
INT
We recommend that you keep a record of changes to the selections on
the Common Services Module. This will assist you if it becomes necessary to
replace the module.
The options available from the switch positions on S1 provide flexibility to
allow the user to customize and change the system to meet changing needs.
Any changes to these switch positions affect all of the inputs. You must also
consider the ISA Sequences chosen for the Annunciator when making changes
to these switches.
5.1.1 FLASH RATE
5-2
PA
PR
CC
AN-3196B Annunciator
COMMON SERVICES MODULE
When an input goes into an alarm state, the LED associated with that
input comes on as a flashing indicator. The rate of flash is determined by the
selected ISA Sequence and the setting of switch positions 1 and 2 on S1 on the
Common Services Module. Most ISA Sequences look at the position of switch
position 1 when the sequence refers to fast flash and at the position of switch
position 2 when the sequence refers to slow flash. (The exception to this is
Sequence F3A which does just the opposite.)
By changing the positions of switch positions 1 and 2 on S1, you can
reverse the normal flash rates as shown in the ISA Sequence Charts or you can
have both flash rates the same. (For Non-First-Out Sequences, the lamps can
be made to come on steady instead of flashing. Refer to "Section 4 Sequence Control Module".)
5.1.2 AUDIBLE AND RINGBACK ALARM CONTROL
Switch position 3 on S1 controls the Automatic Alarm Silencing option.
The Annunciator can be set to automatically silence the audible alarms after
approximately 30 seconds or it can be set to remain sounding until the Reset or
Acknowledge push-button switch is pressed. This switch affects both the
Audible Alarm and the Ringback Alarm.
Either the Audible Alarm or the Ringback Alarm can be pulsed instead of
being a steady signal. This is especially useful when the same audible device is
being used for both alarms and you wish to be able to differentiate the two types
of alarms. In that case, one of the two can be pulsed and the other left steady.
Switch positions 5 and 6 on S1 determine whether the alarms will be pulsed or
steady. (For Non-First-Out Sequences, the alarms can be caused to not sound
at all. Refer to "Section 4 - Sequence Control Module".)
5.1.3 PUSH-BUTTON SWITCH INTERLOCK
Switch position 4 on S1 allows the option of preventing the Annunciator
from recognizing the Acknowledge push-button switch input unless it is preceded
by actuation of the Silence push-button switch. When switch position 4 is "ON",
the only allowable sequence of push-button switches is Silence, Acknowledge,
and Reset (if used). A new alarm will re-initialize the push-button switch
sequence.
5-3
Rochester Instrument Systems
5.1.4 OPTIONAL RELAY CONTACT USE
Switch position 7 on S1 allows you to use the Non-critical/ Ringback
Audible output as a Common Contact Follower instead. In this mode, the relay
(K2) will be activated whenever any point is in the alarm mode, regardless of
sequence status. Jumper JPC is removed and jumper JPD is installed. Since
the Ringback port is used for this function, the Ringback function is not
simultaneously available.
5-4
AN-3196B Annunciator
COMMON SERVICES MODULE
5.2
POWER SUPPLY CONNECTIONS
The Common Services Module has turret-type solder terminals, E1
through E11, which are used to make power connections. (Refer to
SCHEMATIC & ASSEMBLY DRAWING in "Appendix F -Engineering Drawings".
Earth ground is connected to the ground stud on the rear of the
enclosure. From there it is factory jumpered to Terminal Block TB2, and
connected internally to E9. From E9, it may be wired to transformer shield
connections on AC power options.
Prime supply power is connected to TB2-16 (L for AC, + for DC) and
TB2-17 (N for AC, - for DC). TB2-16 is connected internally to E3 through fuse
F2. TB2-17 is connected internally to E4. If prime supply power is 24 V, E3 and
E4 may be wired directly to E6 and E5 for operating power, and to E1 and E2 for
Field Contact Voltage.
The 24 V operating power is rectified by diode bridge CR7 through CR10
and protected by fuse F1. This supply then branches off through CR5 and CR6.
After CR5, it is filtered by C19. It then provides internal 24 VDC power to the
relays and to the 5V regulator Z2. Z2 supplies +5V logic power which is filtered
by C23. After CR6, the supply is filtered by C21 and C22 and provides 24 VDC
output to power the push-button switches and audible devices.
The Field Contact Voltage input from E1 and E2 is rectified by diode
bridge CR11 through CR14 and protected by fuse F3. This supply is then
filtered by C24 and provides excitation voltage to the field contacts being
monitored. R16 bleeds the charge off of C24 when power is removed. It also
prevents C24 from charging up to too high a value from voltage spikes.
If prime power is other than 24 V, an interposing power supply or
transformer device is required to generate 24 V for system power and optional
24 VDC Field Contact Voltage, and to generate 125 VDC for optional 125 VDC
Field Contact Voltage. Device input is connected to E3 and E4. Typical
connections are shown in "SCHEMATIC & ASSEMBLY DRAWING IN
APPENDIX F )
For AC prime supply power, two transformers are wired together. The
individual primaries are wired in parallel for 120 VAC and in series for 240 VAC.
With 240 VAC prime power, the primary series connections are made to E7 and
E8. For 48 or 125 VDC prime power, a model AN-3195B invertor-type power
supply is used.
Output connections from the optional transformers or power supplies are
made to E6 and E5 (24 V) and to E10 and E11 (48/125 V). For 24 VDC Field
Contact Voltage, E1 and E2 are wired to E6 and E5. For 48/125 VDC Field
Contact Voltage, E1 and E2 are wired to E10 and E11.
5-5
Rochester Instrument Systems
5.3
TECHNICAL DATA
The heart of the Common Services Module is a Motorola microprocessor,
Z1. This is Motorola part number MC68HC05C4P. It is an 8-bit CMOS device
with 31 bi-directional Input/Output (I/O) ports in four groups (PA0 through PA7,
PB0 through PB7, PC0 through PC7, and PD0 through PD5, and PD7) plus
several special purpose ports. Z1 contains an embedded program which
assigns specific functions to each port. It governs each output response to the
combination of signals present at all of the inputs.
Z1 runs on +5V and requires an average current of 2 milliamperes (Ma).
The +5V is regulated by Z2 from system 24V. Capacitor C23 acts as a filter. It
absorbs surges, noise spikes and other types of interference which would
otherwise cause voltage transients on the 5V supply. Capacitor C10 provides
additional noise suppression in the vicinity of the microcomputer. +5V (VDD) is
applied to Z1-40. The Common (5V return) connection is to Z1-20.
Z1 uses a crystal-controlled clock circuit. Its frequency is determined by
the value of crystal Y1. This value is selected to generate a clock frequency of
1.000 Megahertz (MHz). This wave form, monitored at Z1-38 and viewed on an
oscilloscope, would have a period of 1.000 microseconds.
Z1 has an internal Reset function which enables it to automatically clear
all registers and begin processing in an orderly fashion when power is applied.
The Reset signal at Z1-1 enables a manual external reset to be applied. The
line over "RESET" on the schematic means that this signal is low (0V) in the
active state and high (+5V) in the inactive state. The circuitry connected to this
pin is designed to force a Reset condition if the 24V supply falls below an
acceptable level.
Feedback Data signal (from the Sequence Control Module) is connected
to the Interrupt Request (IRQ) input port at Z1-2. A Pull-up resistor holds this
line high (+5V) when it is not being forced low externally. The push-button
switch wiring is connected to J1-1 through J1-3, and J1-5.
Functional outputs of the Common Services Module include the relay
control outputs provided at Ports PC1 through PC5 and the Serial Data output
(PC0). The relay control outputs are, respectively, Critical Audible, Non-Critical
(Alarm) Audible, Ringback Audible, Alarm Reflash, and Critical Reflash.
5-6
AN-3196B Annunciator
COMMON SERVICES MODULE
5.4
OUTPUT RELAYS
The Common Services Module controls various output relays. The
Annunciator System can have one or two audible alarms of three available
types: Critical, Non-Critical, and Ringback. Each of the audible alarms can have
a different device so that the type of alarm can be determined by the sound.
The standard module uses relay K1 for the Critical Audible Alarm and
relay K2 for the Non-Critical Audible Alarm. To use the first relay for the NonCritical Audible Alarm, remove jumper JPA and install jumper JPB. To use the
second relay for the Ringback Alarm, remove jumper JPC and install jumper
JPD. NOTE: IF JUMPER JPB IS INSTALLED, JUMPER JPC MUST BE
REMOVED. The second relay can also be used as a Common Contact Follower
(refer to Section 5.1.4).
The system can also have up to two Reflash Relays for driving remote
Annunciators. Relay K3 is used for Non-Critical Reflash and relay K4 is used for
Critical Reflash.
In place of either of the Reflash circuits, the system could be set up with a
Power Monitor output. This circuit would indicate if there is a loss of logic power.
Remove both jumpers JPI and JPJ to use relay K3 as the power monitor.
Remove both jumpers JPK and JPL to use relay K4 as the power monitor.
(Refer to Appendix F, D-1074-337, sheet 4 of 4, for the location of these jumpers
and resistors.)
5-7
Rochester Instrument Systems
5.5
CONFIGURATION CHANGES
The standard module configuration is to have the contacts for all relays
normally open. To change the configuration of relay outputs K1 and K2 from
normally open to normally closed, it is necessary to change some of the jumpers
on the Common Services Module. These changes are also affected by whether
the module has normally energized or normally de-energized relays. (Refer to
"SCHEMATIC & ASSEMBLY DRAWING IN APPENDIX F" for the location of
these jumpers.)
The standard factory configuration is to have all relays normally deenergized. To have normally energized relays, it is necessary to install
transistors Q9 through Q12 for relays K1 through K4 respectively, and to change
jumpers on the Common Services Module. Refer to the SCHEMATIC &
ASSEMBLY DRAWING in "Appendix F - Engineering Drawings" for part
locations. TABLE 5.2 shows which jumpers should be in place (IN) on the
module and which jumpers should be removed (OUT) for each of the possible
choices.
TABLE 5.2 COMMON SERVICES MODULE RELAY JUMPERS
Contact Condition
Relay
DeEnergized
energized
K1
K2
K3
K4
Input Jumper and
Transistor
Configuration
Output Jumper
Configuration
In
Jumper
Out
Jumper In
Jumper
Out
NO
NC
JPF & Q9
JPE
JPN
JPM
NC
NO
JPF & Q9
JPE
JPM
JPN
NO
NC
JPH &Q10
JPG
JPP
JPO
NC
NO
JPH &Q10
JPG
JPO
JPP
NO
NC
JPJ & Q11
JPI
Selected on TB2
NC
NO
JPJ &Q11
JPI
Selected on TB2
NO
NC
JPL &Q12
JPK
Selected on TB2
NC
NO
JPL &Q12
JPK
Selected on TB2
5-8
AN-3196B Annunciator
MAINTENANCE
SECTION 6 - MAINTENANCE
W A R N I N G
STATIC ELECTRICITY IS ALWAYS PRESENT ON YOUR
BODY AND CLOTHING. THEREFORE, YOU MUST
EXERCISE CARE WHEN HANDLING STATIC SENSITIVE
ELECTRONIC ASSEMBLIES AND DEVICES. IMPROPER
HANDLING CAN CAUSE AN EXCESSIVE ELECTROSTATIC
DISCHARGE (ESD) WHICH CAN DAMAGE OR DESTROY
INTEGRATED CIRCUITS, SEMICONDUCTORS, OR OTHER
STATIC SENSITIVE DEVICES. FOR FURTHER DETAILS
AND DISCUSSION ON ESD AND APPROPRIATE HANDLING
TECHNIQUES, SEE THE APPENDIX ON ESD.
The Annunciator should be tested at least once a month following the
Test Procedures in the "Section 3 - Controls & Operation". Identify any
problems which occur. Many problems can be associated with one of the
modules and can usually be resolved by replacing the module.
It is common to begin suspecting component failures or problems with a
module whenever there is a problem with an annunciator. However, annunciator
problems are frequently the result of other, simpler conditions.
Check all screw terminals on Terminal Blocks TB1 and TB2 to make sure
that all wires are in place and that all connections are tight. Make sure that the
prime power source is working correctly and that the supply voltage is reaching
the terminal blocks. Make sure that all wires to the field contacts have continuity
(are not broken or short circuited).
Check all terminal connections every six months. If there is any amount
of vibration in the vicinity of the annunciator, they should be checked more
frequently.
To remove both the Sequence Control Module and the Common Services
Module, release the captive thumbscrew at the bottom of the front panel. If your
unit has the Modbus Serial Data Option, disconnect the 9-pin data cable on the
rear of the annunciator. Alternately pull at the top and bottom of the bezel to
loosen the assembly from the rear edge-grip connectors and slide the entire
assembly forward. To replace the modules, make sure the Sequence Control
6-1
Rochester Instrument Systems
Module (left side as viewed facing the enclosure) is aligned with the slides in the
enclosure. Slide the unit straight into the enclosure. Both cards must line up
with their respective edge connectors. Press the modules firmly into the edge
connectors and tighten the screw. Replace the Modbus connector on the rear, if
equipped.
CAUTION
The AN-3196B plug-in assembly is NOT
interchangeable with the earlier model AN-3196
plug-in module assemblies. Therefore, do not
attempt to service or repair any AN-3196 type
installation by exchanging plug in module
assemblies unless the model number suffixes
match each other and match the suffix on the
housing serial number tag. Even if the suffixes
match extra caution must be used to verify that
the assemblies are identical in the areas of
prime power, FCV and dip-switch settings.
6-2
AN-3196B Annunciator
MAINTENANCE
6.1
TROUBLE SHOOTING
The following chart lists some specific problems which may be
encountered along with the probable solution.
SYMPTOM
PROBABLE SOLUTION
LED's turn on when input is on alarm, but
no flash and no audible alarm.
There is no serial data to the Sequence
Control Module. The Common Services
Module may not be properly seated in the
cell or may be malfunctioning or the
ribbon cable may not be properly
connected.
LED's flash properly, but no audible
alarm or Reflash output on Test or Alarm.
The Common Services Module is not
responding to Feedback Data. Replace
the Common Services Module.
Audible alarm works on test, but not on
real alarm. Critical audible alarm and
Reflash outputs may be continuously
activated.
The Sequence Control Module is holding
the Feedback Bus in abnormal state.
Replace the Sequence Control Module.
One or more push-button switches do not
operate properly.
Verify that the push-button switches are
normally open by measuring +24 VDC
across the push-button switch input
terminals. If the push-button switch is
open, use a clip lead to simulate a pushbutton switch at the annunciator pushbutton switch terminal to determine if the
problem is in the Common Services
Module or in the push-button switch or
push-button switch wiring.
NOTE: MANY START-UP PROBLEMS
CAN BE TRACED TO IMPROPER
WIRING OF FIELD MOUNTED PUSHBUTTON SWITCHES. DOUBLE CHECK
ALL CONNECTIONS.
Test operates properly, but no field inputs
operate.
Field Contact Voltage is not getting to the
field contacts.
Check Field Contact
Voltage power and distribution wiring.
6-3
Rochester Instrument Systems
Nothing works.
Check all power supply voltages. Check
power distribution wiring.
6-4
AN-3196B Annunciator
ORDER CODE
Labeling:
Black lamacoid legend plates with white lettering for
each point, plus one for unit identification (see
engraving information)
AN-3196B Specifications
Input Signals:
NO or NC contacts, switch selectable
Output:
A. LED indicator per point
B. Audible and Reflash Output Relay
Contacts rated at:
5A @ 24 VDC/120 VAC, 3 A @ 240 VAC, or
0.1 A @125 VDC
C. Optional remote mounted audible devices
D. 24 VDC @ 0.15 A available for driving audible
device
Isolation: 1700 VDC
Surge Withstand Capability (SWC):
Test conforms to ANSI C37.90.1-1989 (Oscillatory)
and IEC 801-4 Level 2.
Weight: 9lbs. (4.09 kg) Panel Mount 53 lbs.
(24 kg) in NEMA Enclosure
Ambient Temperature Range:
32EF to 140EF (0EC to 60EC)
Legend Plate
Engraving Sizes
Relative Humidity:
0% to 95% (non-condensing)
Letter Size
Power Source and Requirements:
A. 120 VAC: 120 VAC ± 10%, 50-60Hz at
100 mA maximum
B. 240 VAC: 240 VAC ± 10%, 50-60Hz at 50 mA
maximum
C. 125 VDC: 105 VDC to 140 VDC at 100 mA
maximum
D. 24 VDC: 20 VDC to 28 VDC at 400 mA
maximum
E. 48 VDC: 44 VDC to 52 VDC at 250 mA
maximum
Terminals:
Screw Barrier type
12 AWG wire maximum
Controls:
Internal Test, Acknowledge, Silence and Reset
pushbuttons
Field Contact Voltage:
A. Isolated, internally supplied 125 VDC or 24
VDC for 48 VDC, 125 VDC, 120/240 VAC
Prime Power
B. Non-isolated, internally supplied 24 VDC for
24 VDC prime power or 48 VDC prime power
C. Isolated externally supplied 125 VDC, 48 VDC,
24 VDC, 120 VAC
Enclosures:
General purpose standard panel or surface mount
enclosures. Optional NEMA 4/12 wall mount
enclosures.
B-1
1/8"(3.2mm)
5/32"
3/16
1/4
Other sizes available upon
request
Maximum #
of Lines
Maximum # of
Characters
Per Line
3
3
2
1
22
18
14
11
Rochester Instrument Systems
AN-3196B Ordering
The AN-3196B is supplied in the following versions, stocked and immediately available from the RiS
factory. Individual model numbers are defined by the following fill-in items:
AN-3196B -
1
Sequence
2
3
4
Prime
Field Contact
Audible
Power
Voltage
Options
1. Sequence
A
F2M-1
Optional:
Auto Reset
Manual Reset First-Out with no
subsequent alarm flashing and
silence push-button.
A4, R, M, R12, FFAM2, F3A, F1A,
F2A
2. Prime Power
F
24 VDC
E
48 VDC
C
125 VDC
B
120 VAC
A
240 VAC
5
Reflash
-
6
Enclosure
-
7
Engraving
4. Audible Options
*SNS Sonalert Steady Tone
Remote Mount
*SNP Sonalert Pulsing
Remote Mount
HAC 120 VAC Remote Horn
HDC
24 VDC Remote Horn
HDH 125 VDC Remote Horn
NR
Not Required
*Not integrally mounted in NEMA 4/12
5. Reflash Option
AR
MR
Automatic Reflash
Manual Reflash (Standard)
3. Field Contact Voltage
6. Enclosure
Internally Supplied:
D
125 VDC
X
24 VDC
T
48 VDC
PM
SM
4WM
12WM
Customer Supplied:
D/C
125 VDC Isolated
X/C
24 VDC Isolated
T/C
48 VDC Isolated
Y/C
120 VAC Isolated
Panel Mount
Surface Mount
Wall mount, NEMA 4
Wall mount, NEMA 12
7. Engraving Point Legends
Y
N
B-2
Engraving provided by Rochester
(Legends supplied by user)
Engraving not required with order
(Blank tags provided)
AN-3196B Annunciator
SPARE PARTS
SPARE PARTS
The MicroLarm AN-3196B Visual Annunciator is frequently used to monitor critical
operations. We strongly recommend that you stock sufficient spare parts to prevent
interruption to this monitoring function. The following lists give minimum
recommended quantities.
N O T I C E
ALWAYS PROVIDE THE ANNUNCIATOR SERIAL NUMBER
WHEN ORDERING SPARE PARTS TO MAKE SURE THAT
YOU RECEIVE THE CORRECT PARTS.
DESCRIPTION
RIS PART #
QUAN
FOR PRIME
POWER
1/10 Amp Fuse (slo-blo)
0620-310
3
All
1/4 Amp Fuse (slo-blo)
0620-451
3
All
½ Amp Fuse (slo-blo)
0620-450
3
24VDC, 48VDC
½ Amp Fuse
0620-451
3
125VDC, 120VAC
Lamacoid Tags
1036-106
As Req'd.
All
Microcomputer IC (SCM)
1070-412
3
All
Microcomputer IC (CSM)
1070-416
3
All
NOTE:
If the Annunciating System is being used in critical Applications, it
is strongly recommended that you maintain one complete unit as a
spare.
C-1
Rochester Instrument Systems
APPENDIX A
ISA SEQUENCE CHARTS
Rochester Instrument Systems
ISA SEQUENCE CHARTS
The Annunciator Sequence Designations and associated diagrams in this appendix
are published in ISA Standard S18:1 “Annunciator Sequence and Specification”. They
are presented here to aid in defining the operational characteristics of particular
annunciator sequences.
Each of these charts presents a particular sequence as designated by the associated
sequence letter. The charts show the conditions of four process elements: Process,
State, Visual and Audible.
PROCESS: The Process (P), or status of field contacts, may be either Abnormal or
Normal.
STATE:
The State (S) of annunciation may be Normal Alarm, First Alarm or a
group Subsequent Alarm of the group First Silenced, Silenced,
Acknowledged or Ringback.
VISUAL:
The Visual (V) aspects of the annunciation may be On, Off, Flashing,
Slow Flashing, Fast Flashing, or Intermittent Fast Flashing.
AUDIBLE:
The status of the Audible (A) condition may be Audible (on) or Silent
(off). There are also additional Audible conditions defined for Alarm
Audible (AA) and Ringback Audible (RA).
In the Annunciator Sequence Charts, there is a block for each possible annunciator
state. The annunciator may change from one State to another if the Event indicated
by the arrow occurs. The events are either a Process change or operator action on a
push button such as Silence, Acknowledge or Reset.
P
S
V
A
P ro c e ss
S e q u e n ce
V isu a l
A u d ib le
LEG EN D
LAM P OFF
LA M P
F L A S H IN G
LAMP ON
HORN OFF
HORN ON
Rochester Instrument Systems
Option
Function
Description
1
Silence Pushbutton
A separate pushbutton to allow silencing the
audible device without affecting visual
displays.
2
Interlock Pushbutton
An interlock requiring operation of the
pushbuttons in sequence of SILENCE,
ACKNOWLEDGE, RESET.
4
No Lock-In
The lock-in feature is deleted. Momentary
alarms return to the normal sequence state
without operation of the ACKNOWLEDGE
pushbutton.
6
No Audible
The audible device is deleted.
7
Automatic Silence
A time delay device to silence the alarm
audible device after a set time of 30 seconds,
without affecting the visual displays.
8
Common Ringback
A common audible device to call attention to
both the alarm and ringback sequence
states.
10
No Ringback Audible
The ringback audible device is deleted.
11
Common Ringback
Visual
The same type flashing indication is used to
indicate both the alarm and ringback
sequence states.
12
Automatic Momentary
Ringback
Ringback sequence momentary alarms go to
the ringback state without operation of the
ACKNOWLEDGE pushbutton.
APPENDIX B
ORDER CODE DEFINITION
and SPECIFICATIONS
Rochester Instrument Systems
APPENDIX C
SPARE PARTS
Rochester Instrument Systems
APPENDIX D
ELECTROSTATIC DISCHARGE
Rochester Instrument Systems
ELECTROSTATIC DISCHARGE
D.1 INTRODUCTION
We are all familiar with static electricity. It is the charge we build up when we walk
across a rug. It is possible to build up as much as a 25,000 volt charge on your body
or clothing. When this static electricity discharges from your body to a conductive
object or surface, such as may occur when touching a computer keyboard, the
discharge is referred to as an Electrostatic Discharge (ESD).
If this discharge occurs over a very short period of time, as it typically does,
exceptionally high currents, and therefore power (wafts) can be produced. For
example, if there is a 200 millijoule charge on your body and it discharges in 100
microseconds, a 2000 watt surge is produced. A 2000 waft surge is more than
sufficient to destroy most semiconductor junctions in transistors, diodes, or integrated
circuits.
In many cases, a device subjected to an Electrostatic Discharge is only damaged
initially. It does not actually fail until sometime later. That is, it is a time delayed failure.
As a result, it is not unusual for there to be repeated failure of the same device. That
is, the device can be mishandled during installation, leading to a time delayed failure.
A few weeks or months later the device again fails and is replaced, and potentially
again mishandled. This process can then repeat.
The time delay until failure can be a few days or several months, depending on how
severely the part was damaged by the Electrostatic Discharge. Studies have been
made on the failure mechanism of electronic devices. These studies have shown that
Electrostatic Discharge was the root cause of device failures in as many as 50% of the
cases.
Because you do not see or feel an Electrostatic Discharge, does not mean that one
has not occurred. For most people, a discharge has to be in the range of 2000 to 3000
volts before they even become aware of it. Voltage levels much lower than this can
destroy most electronic devices.
Rochester Instrument Systems
D.2 PREVENTION TECHNIQUES
There are two basic approaches to preventing electronic devices and assemblies from
being damaged by Electrostatic Discharge. The first is to prevent any buildup of static
electricity. This eliminates the source of Electrostatic Discharge.
The second approach is to prevent an Electrostatic Discharge from occurring. Any
static charge present is bled off in a safe, controlled manner.
There are a number of steps that can be taken to prevent the buildup of static
electricity. They all involve the basic principle that a grounded, conductive surface will
not build up a static charge. Any charge present will bleed off to ground.
Since static charges are normally limited to very small amounts of energy, typically
less than a joule, a surface does not have to be highly conductive to effectively bleed
off any charge. For instance, in electronic factories, service centers, and other
facilities which regularly handle electronic devices and assemblies, static build up is
prevented by such techniques as using conductive paint on floors, benches and
cabinets. Conductive carpeting, bins made of conductive plastic, conductive mats, and
grounded metal work benches are also used.
In semiconductor factories and similar areas where the potential for Electrostatic
Discharge damage to devices is extremely high, employees are issued conductive
clothing. When personnel actually handle assemblies and devices, they wear
conductive ground straps on their wrist and/or heel to ground themselves. The key
factor is to prevent any static electricity from building up. If there is no static, there will
be no Electrostatic Discharge.
In a field situation, electronic assemblies and electronic devices ideally should be
handled only at appropriate repair stations, such as a grounded metal bench, with a
grounded conductive floor mat. Therefore, if a printed circuit board or some other
electronic assembly needs to be repaired, it should ideally be removed from a
machine or instrument and taken to a repair station to be worked on.
The device should be transported in a conductive bag or bin and; when making
repairs or handling parts or assemblies, service personnel should wear a wrist and/or
heel ground strap. Spare parts and assemblies should be stored in conductive bags or
conductive bins and should only be handled when at an appropriate repair station.
Even taking care to prevent the buildup of static electricity does not assure that there
never will be a dangerous static charge present. If a static charge is present, the goal
is to prevent a large, rapid discharge from occurring or, if it does occur, to make it
occur where it will do no damage. The ideal way to prevent a destructive discharge
from occurring is to discharge any static present through a large impedance.
Repair personnel should ground themselves through a wrist and/or heel strap. Their
tools should be grounded through a conductive mat before touching any potentially
static sensitive assemblies or devices. Conductive mats and heel and wrist straps
have megohms of impedance, and therefore any charge present is bled off in a
controlled manner through this large impedance.
When this is not possible or practical, personnel can minimize the probability of doing
damage to electronic parts by first touching a water pipe, the chassis or enclosure of
an electronic assembly, or some other ground point. However, this approach will likely
result in the charge being rapidly discharged. This can produce a high energy
magnetic pulse which, in turn, could produce potentially damaging eddy currents in
printed circuit board traces.
It is always best to discharge any charge present through a large impedance. When
handling printed circuit boards or other electronic assemblies, personnel should try to
avoid touching circuit traces or devices with their bare hands or fingers. That is, hold
the board by its edges. If at all possible, a board should be removed for repair and be
put into a conductive bag or bin and then taken to an appropriate repair station to be
worked on.
Do not forget that tools can also carry a static charge. Use only grounded soldering
irons. Touch tools to ground before touching an electronic assembly or device. Store
tools in a conductive tool carrier (metal or conductive plastic), and then ground the
carrier before using any tools.
Rochester Instrument Systems
D.3
SUMMARY OF ESD GUIDELINES
1. Prevent static buildup by using conductive paints, carpeting, mats and metal
surfaces. Use appropriate grounding techniques, including wrist and heel straps for
personnel.
2. Store or transport electronic devices, parts or assemblies in conductive bags or
bins.
3. Only perform repairs at an appropriate repair station.
4. When handling electronic assemblies or printed circuit boards, try to avoid
touching traces on the printed circuit board or static sensitive devices.
5. Remember that tools are a source of static electricity. Only use grounded soldering
irons. Ground tools before using them to bleed off any charge buildup.
6. Discharge yourself before touching or handling any electronic assembly or device.
This can be done by touching a good ground point before touching any electronic
devices or assemblies. Preferably, discharge any static charge through a high
impedance such as a wrist or heel strap.
APPENDIX E
REPAIRS AND WARRANTY
Rochester Instrument Systems
APPENDIX F - ENGINEERING DRAWINGS
TABLE OF CONTENTS
DRAWING
DESCRIPTION
A-1052-675
EQUIVALENT COMPONENT REFERENCE GUIDE
C-1072-210
AN-3196B POWER SUPPLY SCHEMATIC / ASSEMBLY
D-1074-342
AN-3188B SEQUENCE MODULE SCHEMATIC
D-1074-337
AN-3187B CSM SCHEMATIC / ASSEMBLY
D-1072-029
AN-3196B ASSEMBLY DRAWING
D-1072-030
AN-3196B CUSTOMER ACCESORIES DRAWING
D-1072-216
AN-3196B PANEL-MOUNT MOUNTING AND OUTLINE
D-1047-623
AN-3196B SURFACE-MOUNT MOUNTING AND OUTLINE