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TD 90927GB
Installation Guide
Serial Interface T942SI
2003-02-18/ Ver. C
Installation Guide
Serial Interface T942SI
TD 90927GB
Contents
1 Serial Interface T942SI ............................................................................................ 1
1.1 General .............................................................................................................. 1
2 Board Description .................................................................................................... 2
3 Installation ............................................................................................................... 4
3.1 Mounting .......................................................................................................... 4
3.2 Opening the Housing ......................................................................................... 4
3.3 Mounting together with other Units .................................................................. 5
3.4 Wiring Runs ....................................................................................................... 5
3.5 Addressing ......................................................................................................... 6
3.6 Selection of A or B-Bus ...................................................................................... 7
3.7 Connecting Supply Voltage and Buses ................................................................ 7
4 Connection to External Equipment ....................................................................... 7
4.1 RS232C Communication with External Unit ...................................................... 8
4.2 RS422 Communication ...................................................................................... 9
4.3 Data Link Communication .................................................................................. 9
4.4 RS485 Communication ...................................................................................... 9
4.5 Connecting AUX Inputs and AUX Outputs ....................................................... 10
4.6 Switch SW02 ................................................................................................... 10
5 Installation Test Procedure ................................................................................... 11
6 Circuit Board Replacement ................................................................................... 12
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Installation Guide
Serial Interface T942SI
1
TD 90927GB
Serial Interface T942SI
Figure 1. Serial Interface T942SI.
1.1
General
T942SI is a serial interface that is used to connect external equipment to On Site Paging
System and System 5000. T942SI is designed to communicate with the external unit via an
interface of type RS232C, RS422, or RS485. The interfaces are galvanically isolated for up
to 500 V. All the inputs and outputs have transient protection, and all bus connections are
equipped with chokes for increased EMC protection.
As a complement to this installation guide see also the applicable system installation
document:
• TD 90227GB for system 900 or
• TD 91120GB for system 5000.
Supply voltage:
12.5 V DC ± 10%
Current consumption:
Max 500 mA
Delivery includes:
• T942SI
• Modular system bus cable
Optional equipment that may be required:
• If T942SI is to be used for speech pagings, speech module T941SM must be mounted
on the T942SI circuit board.
• If the external unit is to be connected to 8-pin modular connector J09 on the T942SI
for RS232C communication, adapters can be ordered from ATAB for 9-pin and 25-pin
D-sub connectors. See 4.1 RS232C Communication with External Unit on page 8.
Tools, etc., required:
•
•
•
•
Screwdriver
Cutting pliers
Screws for installation
Multimeter
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Installation Guide
Serial Interface T942SI
TD 90927GB
• Soldering iron and solder
2
Board Description
LEDO1
LEDO4
S02
LEDO5
ICO1
SWO1
IC15
IC14
ICO8
S04
IC32
SWO2
1
8
J04
LEDO2
S06
S07
S05
LEDO3
BAT1
S03
S08
S09
J01
1
J03
J02
6
J09
1
J07
6
1
J08
5
Figure 2. Circuit board T942SI.
Connectors
J01, J02:
J03:
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Modular jacks for connection of system bus cabling.
Supply voltage. Also for connection of A or B-bus via
twisted-pair wiring when modular bus cabling
cannot be used.
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Installation Guide
Serial Interface T942SI
J04:
J07:
J08:
J09:
Jumpers
S02:
S03:
S04:
S05:
S06:
S07:
S08, S09:
Switches
SW01:
SW02:
LEDs
LED01A
LED01B
LED02:
LED03:
LED04:
LED05:
IC-Circuits
IC01:
IC08:
IC14, IC32:
IC15:
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TD 90927GB
Connects speech module T941SM.
Connects AUX Input and AUX Output.
Connects external computer with RS422/RS485
interface.
Modular jack for connection of external computer
with RS232C interface.
Jumper points used for software development.
Jumper points used to connect battery.
Jumper points used for 1 Mbit RAM.
Jumper points used to convert from RS422/RS485 to
RS232C.
Jumper points used for RS485 interface.
Jumper points used for RS422 interface.
Jumper points used to connect to B-bus.
8-section address selector switch.
8-section selector switch used to set various
parameters for hardware tests, etc. Normally all
sections are set to OFF.
Green function indicator.
Red function indicator.
Indicates during paging.
Not used.
Indicates during transmission to external computer.
Indicates during reception from external computer.
Microprocessor, type 80C188EB.
Module key.
4 Mbit FLASH PROMs, program memory.
RAM memory with battery backup. It can be either
1 Mbit or 4 Mbit.
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Installation Guide
Serial Interface T942SI
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TD 90927GB
Installation
3.1
Mounting
T942SI should be placed in a dry environment with a temperature range of 0 to +40ºC.
Dimensions (H x W x D)
275 x 130 x 60 mm
56,5
112
9
9
275
188,5
65
130
Figure 3. Mounting dimensions in mm.
Note: To facilitate service after the unit is installed, we recommend a free space of about
150 mm below and 50 mm above the unit.
3.2
Opening the Housing
Use a screwdriver or similar to release the cover by applying a light pressure to the two
snap catches (1) and remove the cover (2).
2
1
1
Figure 4. Realising the cover.
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Installation Guide
Serial Interface T942SI
3.3
TD 90927GB
Mounting together with other Units
1
1
Figure 5. Mounting with other units.
3.4
1
Remove upper and lower covers. The lower rectangular covers are used to fasten
units to each other (1).
2
Fasten the output module with three screws, see 3.1 Mounting on page 4.
Wiring Runs
The plastic partition (shaded in the illustration) is scored to facilitate breaking at
convenient intervals.
1
1
2
3
4
1
5
6
2
Slots
Figure 6. Wiring of modular or twisted pair cabling, (1) and (2).
1
Use pliers to break off a suitable section.
2
Run the wiring out through the partition.
3
Use the slots at the opening to secure the wiring with cable straps.
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Installation Guide
Serial Interface T942SI
TD 90927GB
Wiring can be run four ways for connection with other units:
4
4
1
3
3
2
2
1
Figure 7. Four ways of wiring runs.
•
•
•
•
3.5
Remove the rectangular covers and run the cabling out through the side (1).
Break off sections at short side of case and run the cabling downwards (2).
Run the cabling through the round holes at the bottom of the case (3).
Remove the circular covers at the top of the side case (4).
Addressing
Select the proper address by setting address selector switch SW01 (see the document
System Installation, under Addressing). The address must not be 00 nor the same as any
other system unit.
OFF
ON
1
SW01
8
Figure 8. Addressing on T942SI.
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Installation Guide
Serial Interface T942SI
3.6
TD 90927GB
Selection of A or B-Bus
R092 S08
R093 S09
Figure 9. Position of the 0 ohm resistors and jumpering points.
A-bus is normally used (always used in CTS 900).
To use B-bus:
• Remove the 0 ohm resistors R092, R093 from the circuit board and solder together
jumper points S08 and S09. See figure 9.
3.7
Connecting Supply Voltage and Buses
J03
Supply voltage in
Supply voltage out
A or B-bus
1
2
3
4
5
6
+12V
GND
BUS 1
BUS 2
Figure 10. Connector J03.
1
Connect the supply voltage to screw 1 and 2 of screw connector J03. (See also the
document System Installation, under Power Supply.)
2
Connect modular bus cabling to J01 and J02, and/or A or B-bus to
J03 screw 5 and 6.
Note: The data lines are polarized. Use only twisted-pairs for two-wire connections!
4
Connection to External Equipment
The external unit is to be connected to J09 on the T942SI for RS232C communication, or
to J08 for RS422/RS485 communication.
Note: The T942SI is configured for RS232C communication at delivery from the factory.
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Installation Guide
Serial Interface T942SI
4.1
TD 90927GB
RS232C Communication with External Unit
Connect the external unit to the 8-pin modular connector J09 on the T942SI according to
the applicable drawing below.
9-pin female
D-sub connector
1
Connects
RX 2
directly
TX 3
to external
DTR 4
unit with
GND 5
RS232C
6
Interface
7
CTS 8
9
T942SI
J09
1
2
3
4
5
6
7
8
(not used)
TX
RX
CTRL IN
CTRL OUT
(not used)
GND
(not used)
Figure 11. Connection to a 9-pin female D-sub connector.
Note: Modems with 25-pin D-sub connectors, the RTS and CTS signals must be
jumpered - i.e. pin 4 to 5.
25-pin male
D-sub connector
TX
RX
RTS
CTS
Connects
via modem
to external
unit with
RS232C
GND
Interface
DCD
1
2
3
4
5
6
7
8
T942SI
J09
1
2
3
4
5
6
7
8
(not used)
TX
RX
CTRL IN
CTRL OUT
(not used)
GND
(not used)
DTR 20
25
Figure 12. Connection to a 25-pin male D-sub connector.
Adapters with the correct connections can be ordered from ATAB for both the 9-pin and
25-pin D-sub connectors.
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Installation Guide
Serial Interface T942SI
4.2
TD 90927GB
RS422 Communication
S04
S06
S07
S05
R065
S06
S07
S05
R065
S03
S08
S09
1
J01
J02
J03
6
1
J09
J08
J07
J07
J09
6
1
J08
5
Figure 13. Resistor R065 and soldering points S05-S07.
1
Disable the RS232C interface by removing 0 ohm resistor R065.
2
Solder together jumper points S07.
3
Connect the external unit to J08.
J08
to exernal unit
using RS422
communication
Rb
Ra
Tb
Ta
1
2
3
4
5
Tb
Ta
Rb
Ra
GND
Figure 14. Connection of external unit to J08 using RS422 connection.
Note: If the RS232C interface is to be used in the future it can be restored by soldering
together jumper points S05.
4.3
Data Link Communication
1
Connect the external unit according to figure 14 on page 9, RS422
Communication.
After start-up, if function indicator, LED01 flashes green at a slow intervals, the connection
of the Data Link is incorrect.
4.4
RS485 Communication
1
Disable the RS232C interface by removing 0 ohm resistor R065. See figure 13 on
page 9.
2
Solder together jumper points S06. See figure 13 on page 9.
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Installation Guide
Serial Interface T942SI
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TD 90927GB
Connect the external unit to J08.
J08
to exernal unit
using RS485
communication
Rb/Tb
Ra/Ta
1
2
3
4
5
Tb
Ta
Rb
Ra
GND
Figure 15. Connection of external unit to J08 using RS485 connection.
Note: If the RS232C interface is to be used in the future it can be restored by soldering
together jumper points S05. See figure 13 on page 9.
4.5
Connecting AUX Inputs and AUX Outputs
Two digital inputs and two digital outputs can be connected via J07. The output signals
are dimensioned for 100 mA at max 12 V.
J07
1
2
3
4
5
6
External +12 V
IN1
IN2
OUT 1
OUT 2
External 0 Vdc
Figure 16. Connector J07.
Galvanic isolation of the inputs and outputs is provided by using a separate power supply.
When galvanic isolation is not needed, supply voltage can be taken from the T942SI circuit
board by connecting J07:1 to J03:3 and J07:6 to J03:4.
4.6
Switch SW02
Normally all 8 sections of SW02 are set to OFF.
When the setting of any section is changed, the Central Unit must be restarted to make
the change effective.
Switch settings to hexadecimal values between 80H and FFH are reserved for hardware
testing.
Section 1:
Section 2:
Section 3:
Section 4:
Section 5:
Section 6:
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Used to sent module information to the Central Logger of the WinBK.
ON = Send
OFF = Do not Send
Not used, must be set to OFF.
Not used, must be set to OFF.
Not used, must be set to OFF.
Used to set the module in programmable mode. Used only by PSP2
protocol.
ON = Programmable Mode;
OFF = Normal (Operational) Mode.
Not used, must be set to OFF.
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Installation Guide
Serial Interface T942SI
Section 7:
Section 8:
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TD 90927GB
Not used, must be set to OFF.
Not used, must be set to OFF.
Installation Test Procedure
1
Check that SW01 is set to the correct address and SW02 is set for desired
parameters, and that module key IC08 is installed.
2
Energize all the units in the On Site Paging System. Function indicator LED01 on
T942SI should light red for about 1 second and then go over to a flashing orange.
If it continues to indicate with a steady red check that supply voltage is
12.5 V DC ± 10%.
Flashing indicates a fault as follows:
Colour
red
red
red
green
ON
100 ms
800 ms
1s
100 ms
OFF
800 ms
100 ms
1s
800 ms
Fault
Incorrect software license
Parameter fault
Watchdog reset
No Data-link connection
Function indicator
Figure 17. Function indicator.
3
If the T942SI is connected to a central unit the indicator should show a steady
green indication within 90 seconds.
If the indicator continues to blink orange, check:
• Polarity
• Connections on the T942SI circuit board.
• T942SI is properly addressed.
If everything seems to be OK but the function indicator still blinks, the fault is probably
located outside the T942SI module. Check the other system units according to the
document System Installation or contact your dealer.
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Installation Guide
Serial Interface T942SI
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TD 90927GB
Replace the cover.
When all other units are installed perform the system test described in the applicable
System Installation document: TD 90227GB for system 900 or TD 91120GB for system
5000.
6
Circuit Board Replacement
1
Deenergize the unit.
2
Remove the cover.
3
Lift off the screw connectors from the circuit board.
4
Press the four holding clips to release the circuit board (1) and release the circuit
board (2), (3). The heat sink is mounted on the circuit board and is replaced
simultaneously.
3
2
1
1
1
1
Figure 18. Removing the circuit board.
5
Install the new circuit board in the case and make sure the board clicks into
position.
6
Set all switches and jumpers as they were on the old circuit board and replace the
connectors.
7
Remove the module key from the old circuit board and install it on the new circuit
board.
8
Reinstall the applicable software.
9
Check installation according to 5 Installation Test Procedure on page 11.
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