The IA-3302-2 Relay & Isolated Inputs Module is a scalable, flexible and low cost solution for PC based control. It can be controlled remotely by any standard PC, using the simple RS-232 protocol. The module includes 2 opto-isolated digital inputs to protect your PC from external equipment and 2 relay outputs for connecting up to 115VAC/30VDC. The module can be mounted on a din-rail for easy installation. 4 indicator LEDs are located at top of the IA-3302, indicating the isolated inputs and relay status.