CPU at a glance
The CJ1G-CPU45H is a discontinued Omron PLC CPU from the Series CJ1 family. It offers 128K Words of program/data memory and supports expansion up to 40 modules across 3 racks. Communication is via a single RS-232C port; no Ethernet on this CPU. Programming and configuration are handled through the CX-One software suite. The unit includes a battery backup for retained memory and mounts on a DIN rail.
Lifecycle and sourcing reality
The CJ1G-CPU45H is officially discontinued. There is no direct Omron successor listed in the evidence. Sourcing is limited to surplus, broker, or secondary-market channels. Expect to submit an RFQ for availability and pricing; lead times and condition vary by lot. No compliance documentation (RoHS, REACH, UL, IEC) is provided in the evidence for this part.
Panel fit and wiring note
The CJ1G-CPU45H shares the same physical footprint and DIN rail mounting as the CJ1G-CPU44H. It drops into a panel wired for the CJ1G-CPU44H without rewiring — same backplane, same power supply, same I/O rack layout. The RS-232C port pinout is identical across the CJ1G-CPU4xH series. Weight is 11 lbs (5 kg).