The 16 channels relay output / photo isolator input adapter provides relay output functions. The relay output part provides 16 relays to drive 16 different output channels. Each relay channel can be used to control ON/ OFF of external devices, to drive external high power relays, to activate alarms... etc.

The photo isolator input part provides 16 photo couple digital input channels, which allow the input signals to be completely floated and prevent the ground loop.