CHQ-MRC2/FS DIN(SCI) Fail Safe Mains Relay DIN Module with SCICHQ MRC2 FS DIN(SCI) Fail Safe Mains Relay DIN Module with SCI Model CHQ MRC2 FS DIN(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 DIN Rail mountable with an