Hochiki Fail Safe Analogue Mains Relay Controller
£46.00 (inc VAT: £55.20)
Summary
The Hochiki CHQ-MRC2/FS(SCI) is a loop-powered, single input/output module designed for use within Hochiki’s ESP intelligent fire detection systems. It provides a single, mains-rated relay output for the control of ancillary building systems, including dampers, door magnets, extractor fans, and plant or equipment shutdown. Addressing is achieved via simple DIL switches for reliable and straightforward commissioning.
The module features fail safe relay operation, meaning the relay defaults to a defined safe state in the event of a loop or power fault — subject to control panel compatibility. The auxiliary monitored input can be configured for local power supply fault monitoring or used as a general-purpose input, adding flexibility to system design.
The CHQ-MRC2/FS(SCI) is available as a standard wall-mount module or as a DIN rail-mountable version (CHQ-MRC2/FSDIN(SCI)). Both variants feature an integral short-circuit isolator (SCI). A deeper, glanded IP65 backbox is available for installations requiring additional environmental protection, and the module can be used with the CHQ-BACKBOX to comply with BS 7671.
Features
- Loop powered with single loop address
- Provides a single mains-rated relay contact
- Fail safe relay control (check control panel compatibility for fail safe operability)
- Relay contact rated at 250 VAC @ 5 A (resistive) and 48 VDC @ 2 A (resistive)
- Auxiliary monitored input for power supply fault monitoring or general-purpose use
- Integral short-circuit isolator (SCI) on both module and DIN variants
- Also available as a DIN rail-mountable version (CHQ-MRC2/FSDIN(SCI))
- DIL switch addressing for reliable configuration
- Deeper, glanded IP65 backbox available
- Compatible with CHQ-BACKBOX for BS 7671 compliance
- White ABS housing as standard; semi-opaque black ABS lid (white lid version CHQ-LID(WHT) also available)
FAQs
What is the CHQ-MRC2/FS(SCI) used for?
The CHQ-MRC2/FS(SCI) is a single input/output module that provides a mains-rated relay output for controlling ancillary systems within a fire detection installation. Typical applications include releasing or holding door magnets, shutting down plant and equipment, controlling dampers, and switching extractor fans. It is designed for use within Hochiki’s ESP analogue addressable fire detection systems.
What does “fail safe” mean in the context of this module?
Fail safe relay operation means the relay defaults to a predetermined safe state if the loop or power supply fails, rather than remaining in its last active state. This is important in life safety applications where a predictable response to a fault condition is required. Fail safe operability is subject to compatibility with the connected fire alarm control panel — check panel documentation before specifying.
What is the relay contact rating?
The relay contact is rated at 250 VAC @ 5 A (resistive load) and 48 VDC @ 2 A (resistive load). For mains AC switching, the connected control panel must be compliant with the Low Voltage Directive for SELV circuits. No fuses are fitted to the device, so the relay output circuit must be protected by a suitable over-current protection device.
What is the auxiliary monitored input used for?
The auxiliary monitored input can be used to monitor a local power supply for faults, or it can be configured as a general-purpose input to bring an external signal into the fire detection system. This adds flexibility where additional monitoring is required alongside the relay output function.
Is a DIN rail version available?
Yes. The CHQ-MRC2/FSDIN(SCI) is a DIN rail-mountable version of the same module, offering identical functionality in a compact green ABS format suitable for installation within a panel or cabinet. Both the standard and DIN versions feature an integral short-circuit isolator.
Can the module be used in damp or outdoor-adjacent environments?
A deeper, glanded IP65-rated backbox is available for installations where additional environmental protection is required. The module itself has a maximum humidity rating of 95% RH non-condensing at 40°C, and an operating temperature range of -10°C to +50°C.
Specifications
- Ordering Code (Module): CHQ-MRC2/FS(SCI)
- Ordering Code (DIN Module): CHQ-MRC2/FSDIN(SCI)
- Operating Voltage: 17–41 VDC
- Low Power Mode (0.75s): 100 µA
- Quiescent Current (Typical): 300 µA
- Current Consumption: 22 mA ±20% (polling)
- Current In Short Circuit: 8 mA
- Maximum Short Circuit Current: 1 A
- Relay Contact Rating: 250 VAC max, 5 A (resistive load); 48 VDC max, 2 A (resistive load)
- Input EOL Resistor: 10 kΩ, ±5%, 0.25 W
- Input Threshold Level: ON = 470 Ω, Short circuit <50 Ω, Open circuit >100 kΩ
- Storage Temperature Range: -30°C to +60°C
- Operating Temperature Range: -10°C to +50°C
- Maximum Humidity: 95% RH non-condensing (at 40°C)
- Weight (Module): 360 g (add 235 g when using CHQ-BACKBOX)
- Weight (DIN Module): 145 g
- Dimensions (Module With Lid): L157 x H127 x D35 mm (L157 x H127 x D79 mm with CHQ-BACKBOX)
- Dimensions (DIN Module): L119 x H108 x D24 mm
- Colour/Material (Module): White ABS body and CHQ-BACKBOX; semi-opaque black ABS lid (white lid CHQ-LID(WHT) also available)
- Colour/Material (DIN Module): Green ABS
Downloads
- Datasheet (Adobe PDF)
Additional information
| Weight | 1 kg |
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