The SeaDAC Lite OEM - USB to 4 Isolated Inputs; 4 Form C Relays offers 4 optically isolated inputs and 4 Form C (SPDT) relay outputs for easy control and monitoring via an internal USB connection. The inputs support 5-30VDC with 3500VDC isolation and the Form C relays can switch up to 6A loads at 250VAC and 5A at 60VDC..