Fail Safe Mains Relay Module Controller With SCI

Model CHQ-MRC2/FS(SCI) is a Single Input/ Output Module, which provides a single, mains-rated relay output for the control of such devices as dampers, access control equipment (e.g. door magnets), extractors or plant and equipment shutdown. The monitored input can be used for local power supply fault monitoring or as a general-purpose input.

The unit is also available as a DIN Rail mountable version; with an integral short-circuit isolator. The CHQ-MRC2/FS(SCI) utilizes simple DIL switches for reliable addressing.

Features and benefits:

• Loop powered with single loop address.
• Provides single mains rated relay contact.
• Provides fail safe relay control (check for control panel compatibility for fail safe operability).
• Provides Relay Contact Rated at 250 V a.c., @ 5 A (resistive) and 48 V d.c., @ 2 A (resistive).
• Provides Auxiliary monitored input.
• Also available as DIN.
• Both models feature an integral SCI.
• Deeper, glanded IP65 backbox available.
• Can be used with CHQ-BACKBOX to comply with BS 7671.
• 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.
• Input EOL resistor 10 kΩ, ±5%, 0.25 W.
• Input threshold level ON=470 Ω, Short cct <50 Ω, Open cct >100 KΩ.