FSR IT-R4S Relay Module

The FSR IT-R4S Relay Module is ideal for projection screen control, relay remote control, speaker muting or any environment where RS-232 control of switching via the 4 internal single-pole, double-throw relays is desired. "Daisy chain" capability allows connection of the IT-R4S with additional modules to control other RS-232 devices. It is powered by a 12 VDC power supply (purchased separately).