The Hochiki CHQ-DSC2/M(SCI) is a marine-approved analogue addressable dual sounder controller for the Hochiki ESP protocol. It provides two sounder outputs that can be driven separately, each fully monitored for faults, plus a monitored input for local power supply fault monitoring or general use. It has an integral short-circuit isolator, needs a 24 V DC auxiliary supply and is addressed with DIL switches.
Key features
- Single loop address
- Two independent sounder circuits, each monitored for open and short circuit
- Auxiliary monitored input
- Each alarm circuit fused
- Outputs driven continuously or with synchronised pulsed drive
- "Smart-Fix" housing; deeper glanded IP65 back box (CHQ-BACKBOX) available
- Integral short-circuit isolator (SCI)
- Can be used with CHQ-BACKBOX to comply with BS 7671
- Approved to MED, DNV and IEC 60092-504 requirements
- DNV Module B (type examination) and Module E (product quality assurance)
Technical specifications
- Ordering code: CHQ-DSC2/M(SCI)
- Operating voltage: 17-41 V DC
- Quiescent current: 350 µA typ. (add 200 µA per active sounder line)
- Current consumption: 22 mA ±20% (polling)
- Current in short circuit: 8 mA
- Maximum short-circuit current (loop): 1 A
- External supply: 20-28.8 V DC (24 V DC nominal)
- Current per bell circuit: 8 mA sounder on, 6 mA sounder fault
- Sounder output: 1 A per line max., fused at 1.25 A
- Maximum sounder line capacitance: 0.3 µF per line
- Sounder end-of-line resistor: 1 kΩ ±5%, 2 W
- Input end-of-line resistor: 10 kΩ ±5%, 0.25 W
- Input thresholds: ON 470 Ω, short circuit <50 Ω, open circuit >100 kΩ
- Operating temperature: -10 °C to +50 °C
- Storage temperature: -30 °C to +60 °C
- Weight: 360 g (add 235 g with CHQ-BACKBOX)
- Dimensions: 157 x 127 x 35 mm module with lid (79 mm deep with CHQ-BACKBOX)
- Colour / material: white ABS module and back box; semi-opaque black ABS lid as standard
- Approvals: DNV rules for classification (ships); IMO FSS Code chapter 9; location classes temperature B, humidity A, vibration A, EMC B
