8 (AC or DC) OPTO-22 Solid State Relay Channels (Connected to Port’s A; B or C of the Host DAQ PC Card’s PIO or DIO circuitry). For use with PC-43A1/2/3/4 & PC-43D using a 10way 1:1 ribbon cable, as well as other DAQ PC-Cards using a custom made cable. High quality screw terminals for easy field wiring. There are four 3.2mm diameter holes for mounting or a DIN-RAIL Mounting Base may be fitted (recommended for quick hassle free installations). Dimensions: 107.5(W) x 108.5(L) x 28(H) mm