Mounting Boards: Type - I/O Module Mounting Rack; Use With - G4 Digital I/O Modules; Module Capacity - 32; Control - PAMUX B4 Connector; Communication - 2 x 50 Pin PAMUX Bus Header Connectors; Interface Connection - Field: Screw Terminal Strip (#10 AWG Max). Power: Screw Terminals (#10 AWG Max); Voltage - 5VDC; Mounting Type - Plug-in Relay Board; Dimensions - 10.5 x 7.00 x 3.80"(266.7x177.8x96.5mm); Operating Temperature - 0 to 70 deg C (32 to 158 deg F); Manufacturer Series - OPTO 22