Hochiki ESP Intelligent Marine Approved Single Zone Monitor with SCI (CHQ-SZM2/M(SCI))

The Hochiki CHQ-SZM2/M(SCI) is a marine-approved analogue addressable single zone monitor for the Hochiki ESP protocol. It lets up to six conventional detectors (or up to three DRD-EM flame detectors) be connected to an ESP analogue addressable loop, and has an integral short-circuit isolator. Addressing is set with DIL switches. The zone has no line continuity options, so call points should be wired at the start of the zone.

Key features

• Loop powered, single loop address
• Supports up to 6 conventional detectors, or up to 3 DRD-EM flame detectors
• Remote LED output
• Fully monitored for short- and open-circuit faults
• Integral short-circuit isolator (SCI)
• Can be used with CHQ-BACKBOX (IP65) to comply with BS 7671
• SIL2 variant available
• 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-SZM2/M(SCI)
• Operating voltage: 17-41 V DC
• Quiescent current: 260 µA
• Current consumption: 22 mA +20% (polling)
• Current in short circuit: 8 mA
• Maximum short-circuit current (loop): 1 A
• End-of-line device: TE-RH-E (polarity conscious)
• Zone voltage: 15.3-17.1 V
• Maximum zone resistance: 50 Ω
• Maximum zone capacitance: 0.3 µF
• Detectors per zone: SLG, SLK, SLR, SIF, SIH, SIJ, DCC, DCD, DFJ 6 max.; DRD-E 3 max.; DCA, DFB, DFE and CCP-E no limit
• Operating temperature: -10 °C to +50 °C
• Storage temperature: -30 °C to +60 °C
• Maximum humidity: 95% RH non-condensing (at 40 °C)
• Weight: 328 g (add 235 g with CHQ-BACKBOX)
• Dimensions: 157 x 127 x 35 mm with lid (79 mm deep with lid and back box)
• Approvals: DNV rules for classification (ships); IMO FSS Code chapter 9; location classes temperature B, humidity A, vibration A, EMC B