Download NC942 / NC942V One Zone Call Controller Instructions

Battery backup enable/disable
(Link PLK2) Available on NC942B controllers only
NC942/NC942B
Link PLK2 enables or disables the call controller’s 500mAHr rechargeable battery
Fit!to
backup facility. Note that this facility is available on NC942B call controllers only.
Enable
battery
When enabled (link PLK2 fitted), the NC942B’s onboard battery backup supply
PLK2
will continue to power the system for approximately 24 hours (standby) plus 15
minutes (alarm running time) in the event of a mains failure. This will be indicated by the
controller’s ‘ON’ LED flashing green approximately once per second.
One Zone
Call Controller
Should the mains supply remain disconnected for a prolonged period of time, the battery
backup facility will automatically shutdown to prevent the batteries from deep discharge.
The default setting for Link PLK2 is link not fitted/battery disabled. This is to conserve battery life and ensure the safety of the controller during storage/transit. Note that the shorting
link required to enable the facility is provided in the controller’s accessory pack.
Sounder and LED test facility
Pressing the controller’s RESET button when link PLK1 is fitted in the Reset (a) position will
make its sounder and alarm LED activate. When released, the LED and sounder will switch off.
!
This equipment must be installed and maintained by a suitably skilled
and technically competent person.
This Call Controller is a piece of Class 2 equipment. However, any metal parts used during
installation (i.e. metal back box) MUST be earthed. The earth termination point on the One
Zone Call Controller is provided for installer convenience only and, as such, should only be
used if an earth connection is not required elsewhere.
BASIC OPERATION
The green power 'ON' indicator indicates that the call controller is powered up.
When a standard call is triggered at any device connected to the controller (see figure 1), the
controller’s sounder will generate a constant tone and its red 'CALLING' LED will illuminate.
The call controller’s relay will also activate and any external equipment connected to the
controller’s relay contacts (see page 3) will operate as configured.
Depending on how Link PLK1 has been configured (see page 3), pressing the controller’s
'RESET' button will (a) reset the call (b) mute the call or (c) have no effect. (Note that standard
calls can also be cancelled at the device that originated the call if it has a reset facility or via
a remote reset point).
If an emergency call is triggered on a device connected to the controller, the call controller’s
sounder will pulse and its red 'CALLING' LED will flash. The controller’s relay will also pulse
and any external equipment connected to the controller’s relay contacts (see page 3) will
operate as configured. Note that emergency calls override standard calls and can only be
reset at the device from which they were generated.
GENERAL
TECHNICAL SPECIFICATION
Mains supply:
Output:
Indicators:
Sounder:
Controls:
IP Rating:
Dimensions:
Voltage: 230V a.c.; Max current: 23mA; Frequency: 50Hz.
Voltage: 12V d.c.; Current: 140mA;
Volt-free relay contacts (NO/C/NC) rated at 30V d.c. @ 1A
Red alarm present LED; Green supply present LED (flashes green on
NC942B model only when battery back up is active)
Active in alarm.
‘RESET’ Button (link selectable for reset, mute or no function).
IP31 when correctly installed.
147 x 87 x 39mm (WxHxD). Mounts on 25mm UK double gang back box.
© 2005. Approved Document No: DNU0942000 Rev 1. We reserve the right to alter product specifications at our
discretion and without prior notice. Errors and omissions excepted. This manual has been carefully checked prior
to publication. However, no responsibility can be accepted by the manufacturer or distributors of this equipment
for any misinterpretation of an instruction or guidance note or for the compliance of the system as a whole.
The NC942 is a one zone call controller with a built-in mains to regulated 12V d.c. 140mA
power supply. Its features include a volume adjustable sounder, a link-selectable mute/reset
button, a Power ‘ON’ LED, an Alarm ‘CALLING’ LED and a volt-free relay output (for optional
interfacing to externally powered beacons, strobes or other ancillary devices). It also features
a Braille text label for ease of use by the visually impaired.
The NC942B call controller includes all of the above plus an additional on-board rechargeable
battery backup facility providing up to 24 hours standby and 15 minutes alarm running time.
Both controllers are fully compatible with our entire range of 800 Series Call System
components, making them ideal for virtually all single zone applications including disabled
persons toilet alarms.
I N S T A L L A T I ON I N S T R U C T I O N S
Approved Document No: DNU0942000 Rev 1 • Page 1 of 4
INSTALLATION
ENGINEER SELECTABLE FUNCTIONS
ALWAYS ENSURE THE MAINS SUPPLY IS ISOLATED BEFORE MAKING ANY CONNECTIONS.
Figure 2 : Rear view of the NC942/NC942B Call Controller
The call controller should be sited internally on a standard UK double gang back box (minimum
depth 25mm) in an area where it is readily accessible by the person(s) designated to use it. The
area should be clean and dry and the ambient light and sound levels should allow the status of
the indicators and internal sounder to be seen and heard. Any likelihood of tampering or
vandalism should also be taken into account.
Reset
Volume
VR1
CONN2
Figure 1 : Example NC942/NC942B Call Controller Wiring
NEGATIVE
Three cores of four
core stranded burglar
alarm cable
Mute
PLK1
L
RECHARGEABLE
BATTERY BACKUP
SUPPLY COVER
N
NC942B
MODEL ONLY
SIGNAL
CONN3
RLY1
Fit to
Enable
PLK2 battery
+VE
SIGNAL
-VE
NO
C
NC
POSITIVE
Spr Sig -Ve
Sig -Ve +Ve
RESET
ON
F
U
S
E
Sig -Ve
CALL
Reset button operation
ALERT
Call
Call
NC942/NC942B
Call Controller
1mm2
T&E
RESET
CALLING
RESET
3A Switch
Fused Spur
+Ve
NC806CS Overdoor
Light c/w Sounder
Call
NC809DBB Reset
NC802DEB-1/2
NC807C
Ceiling Pull Point c/w Sounder Emergency Call Point
A maximum of five 800 Series devices (ceiling pulls, call points, overdoor lights,
reset points, etc.), can typically be connected to the call controller. Always refer
to the installation instructions supplied with each device before installation
Mains wiring
The general requirement for the mains supply to the call controller is fixed wiring, using three
core cable of not less than 1mm2. This should be fed from an isolating switched fused spur,
fused at 3A, which is marked appropriately and secure from unauthorised operation.
Live and neutral should be connected to the controller’s L and N terminals
respectively. If a plastic back box is used, make the earth connection to the
terminal marked
at connector block CONN2. If a metal back box is used,
the earth connection must be made to back box’s earth bonding point.
All external wiring brought into the unit must be adequately insulated with
PVC or Neoprene.
(Link PLK1)
Link PLK1 allows the call controller’s on-board RESET button to be set up to:-
CONN2
L
N
(a) Reset the system
In this position, pressing the controller’s RESET button when a standard call is
active will return the controller to its normal state.
(b) Mute the system
In this position, pressing the controller’s RESET button when a standard call is
active will mute the controller’s on-board sounder.
(c) Have no effect
In this position (no link fitted), pressing the controller’s RESET button when a
standard call is active will have no effect.
!
Reset!!!!!!!!!!!!!!!Mute
Reset!!!!!!!!!!!!!!!Mute
Reset!!!!!!!!!!!!!!!Mute
Many authorities insist that a call system’s reset function is carried out at ‘point of source’
(i.e. in the room in which the call was made). This is to ensure that the person who raised
the alarm is visited. As such, the default setting for Link PLK1 is link not fitted/no effect.
Volume control
(Potentiometer VR1)
All mains wiring should be provided in accordance with the current edition of the IEE Wiring
Regs (BS 7671) or in accordance with the relevant national wiring rules.
Potentiometer VR1 can be used to adjust the level of the call controller’s on-board
sounder. Turning the control clockwise with a terminal screwdriver will increase
the volume, turning it anti-clockwise will decrease it.
Extra low voltage (ELV) wiring
On-board volt-free relay operation
Four core stranded burglar alarm cable is ideal for the extra low voltage wiring on most installations.
The call controller includes an on-board volt-free relay with normally open (NO),
normally closed (NC) and common (C) contacts. The relay contacts are rated at
30Vd.c. @ 1A and can be used to switch optional externally powered devices such
as sounders, strobes or the extra low voltage coils of mains controlling relays.
All extra low voltage wiring must be carefully planned before starting the job. Always segregate
extra low voltage wiring from the mains wiring.
In the event of a short circuit on the extra low voltage wiring, an internal self-resetting fuse will
temporarily isolate the system until the fault is cleared. The Call Controller is also protected by a
non-serviceable thermal fuse in its transformer winding which will blow if there is a serious
malfunction. If this happens, return the controller for repair.
Approved Document No: DNU0942000 Rev 1 • Page 2 of 4
(no!link!fitted)
Volume
(RLY1)
CONN3
C
1 -Ve +Ve
NC
-Ve SIG +Ve
NO
NC C NO
When no calls are on the system, the normally closed contact is made. When an alarm signal
is present, the relay switches and the normally open contact is made. Muting the system will
have no effect on the relay’s operation.
Approved Document No: DNU0942000 Rev 1 • Page 3 of 4