Features – Single Loop Address – Each Alarm Circuit Fused at 1 amp – Two Independent Sounder Circuits, each Fully Monitored for Open and Short Circuit Faults – Auxiliary Monitored Input – Outputs can be Driven Continuously or Synchronised Pulsed Sounder Drive – “Smart-Fix” Housing System for flexibility – Available as DIN-Rail version – Both versions available with or without integral SCI

Model CHQ-DSC is a Dual Sounder Controller, which has been designed to provide two sounder outputs (that can be driven separately) with full fault monitoring. The monitored input can be used for local power supply fault monitoring or as a general-purpose input. The unit utilises simple DIL switches for reliable addressing. A back box is also available (CHQ-BACKBOX) which, when used in conjunction with the CHQ-DSC, increases the IP rating to IP65.

Specification
Order codes *1 CHQ-DSC (module)
CHQ-DSC (module with SCI)
CHQ-DSC/DIN (DIN module)
CHQ-DSC/DIN (DIN module with SCI)
Operating voltage 17 – 41 Vd.c.
Low power mode 200A*2
Quiescent current (typ)*3 290A*2
Current consumption 22mA  20 % (polling)
Current in short-circuit 8mA (CHQ-DSC/DIN)
Maximum short-circuit current (Loop) 1A (CHQ-DSC/DIN
External supply voltage 20-28.8 Vd.c. (24Vd.d. nominal)
Current consumption (per Bell circuit) Sounder On – 8 mA, Sounder Fault – 6 mA
Sounder output current 1A/line (max) fused @ 1.25A
Sounder line capacitance 0.3F/line max/line
Sounder E.O.L resistor 1k, 5%, 2W
Input E.O.L resistor 10k, 5%, 0.25W
Input threshold levels ON=470, short cct< 50, open cct>100K,
Weights & Dimensions

CHQ-DSC : 354g;CHQ-DSC : 360g – L=157mm x W=127mm x D=35mm (Module plus Lid) D=79m (CHQ Module plus Lid plus CHQ-BACKBOX) (add 235g to module weight when using CHQ-BACKBOX)

CHQ-DSC/DIN : 140g;CHQ-DSC/DIN : 145g – L=119mm x W=108mm x D=24mm
Colour and enclosure material CHQ Module & CHQ-BACKBOX White ABS, DIN Module Green ABS, Module Lid Semi-Opaque Black ABS as standard, white version available (CHQ-LID) *1 Fire alarm control panel compatibility required for these products. *2 SCI versions will take additional current (50A). *3 Add 200A per Active Sounder Line.