CJ1W-DRM21 Omron PLC I/O Module for use with CJ Series, 31 x 90 x 78.7 mm. The Omron programmable logic controller(PLC) I/O DeviceNet module is a communication interface, which supports communication between input and output units and the PLC with the help of the DeviceNet protocol. This PLC is for use with CJ series. Its voltage rating ranges between 11VDC and 25VDC. It is equipped with settings and monitor functions aimed at improving both, design and start-up efficiency.