Simplex 2190-9173 2-Point I/O ModuleThe Simplex 2190 9173 2 Point I O Module allows a Simplex MAPNET II communication channel to monitor an input contact closure and control an output relay from a single compact module. Module power is supplied from the MAPNET II communications channel, eliminating the need for separate power wiring. This device uses two addresses on the MAPNET II channel and consumes two device loads of power. This product is for use with 4100, 4120, or 4020 series