ASCII Controlled Relay W/ Serial Loop IT-R4S

FSR's ASCII Controlled Relay W/ Serial Loop provides RS-232 relay control for AV and automation systems that need dependable device switching from a serial command structure. The IT-R4S uses four internal SPDT relays controlled by a simple ASCII protocol, and multiple modules can be daisy chained to expand relay control across larger systems. The serial loop output can pass RS-232 commands to other controlled devices, making it useful for screen control, shade control, equipment power sequencing, room automation, and other relay-based AV applications. One compatible power supply can support up to five IT-R4 or IT-R4S modules, helping reduce wiring complexity in control systems.

Below is a typical application diagram showing how useful these modules really are: