Hochiki ESP Intelligent Marine Approved Dual Input Module with SCI (CHQ-DIM2/M(SCI))

The Hochiki CHQ-DIM2/M(SCI) is a marine-approved analogue addressable dual input module for the Hochiki ESP protocol. It interfaces volt-free inputs such as door contacts, sprinkler flow switches and plant equipment to the ESP loop, and has an integral short-circuit isolator. Used with the CHQ-BACKBOX, the IP rating increases to IP65.

Key features

• Approved to MED by DNV
• Loop powered, single loop address
• Two independent inputs for monitoring volt-free contacts
• Each input configurable for normally open or normally closed contacts
• Integral short-circuit isolator (SCI)
• Can be used with CHQ-BACKBOX to comply with BS 7671
• SIL2-approved variant available

Technical specifications

• Ordering code: CHQ-DIM2/M(SCI)
• Operating voltage: 17-41 V DC
• Quiescent current: 280 µA (typ.); add 85 µA per input for normally closed monitoring
• Current consumption: 22 mA ±20% (polling); 4.3 mA (both inputs active)
• Current in short circuit: 8 mA
• Maximum short-circuit current (loop): 1 A
• Input line resistance: ON threshold <50 Ω, OFF threshold >100 kΩ
• Operating temperature: -10 °C to +50 °C
• Storage temperature: -30 °C to +60 °C
• Maximum humidity: 95% RH non-condensing (at 40 °C)
• Weight: 327 g (add 235 g with lid and back box)
• 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