7
ALARM CIRCUIT MODULE INSTRUCTION MANUAL
Wiring recommendations
The SCM-ACM circuits are rated for 500mA each. The table shows the maximum wire run in metres for different wire
gauges and alarm loads.
Front Unit LED Indications
LED Indication
Description
LED Indication
Description
Flashing yellow when a wire break in
the circuit is detected.
Flashing green when the module is
programmed as an unsynchronized bell
output.
Solid green when the module is programmed
to provide a 24v auxiliary output.
Flashing yellow when a short in the
circuit is detected.
Pulses to show communication between the
module and the motherboard.
Specifications
Specification
SCM-ACM
Design Standard
EN54-2
Approval
LPCB (Pending)
Circuit Voltage
29VDC Nominal (19V – 29V)
Circuit Type
Regulated 24V DC. Power limited & Supervised.
Maximum Alarm Circuit Current
2 x 500mA
Maximum Aux 24V Current
2 x 400mA
Maximum RMS current for a single sounder device
350mA
Maximum Line Impedance
3.6Ω total (1.8Ω per core)
Wiring Class
2 x Class B [Power limited & Supervised]
End of Line Resistor
4K7Ω
Recommended cable sizes
18 AWG to 14 AWG (0.8mm
2
to 2.5mm
2
)
Special Applications
24V auxiliary voltage output
Operating Temperature
-5°C (23°F) to 40°C (104°F)
Max Humidity
93% Non-Condensing
Size (mm) (HxWxD)
105mm x 57mm x 47mm
Weight
0.15KG
Compatible Warning Devices
Wire Gauge
125mA Load
250mA Load
500mA Load
18 AWG
765 m
510 m
340 m
16 AWG
1530 m
1020 m
680 m
14 AWG
1869 m
1246 m
831 m
Alarm Circuit Devices
ZXT
Xtratone Conventional Wall Sounder
ZXTB Xtratone Conventional Combined Wall Sounder Beacon
ZRP
Conventional Raptor Sounder
ZRPB Conventional Raptor Sounder Beacon
RECOMMENDED CABLE:
Cable should be BS approved FPL,
FPLR, FPLP or equivalent.
