Omron CJ1M-CPU11-ETN – CJ1M PLC CPU Unit with Built-in Ethernet
The Omron CJ1M-CPU11-ETN is a CPU unit from Omron’s CJ1M series of modular PLCs, with built-in Ethernet. It combines the functions of the standard CJ1M-CPU11 with those of an Ethernet unit in one module, saving a slot on the rack and the cost of a separate communication unit.
The CJ1M-CPU11 is the entry-level CPU of the CJ1M range, with 5K steps of program memory, 32K words of data memory and up to 160 I/O points. It is suited to small and medium machines that need a modular PLC with networking. It also has an RS-232C port for HMIs and serial devices. Many machines built in the 2000s and 2010s still run on CJ1M CPUs, so a like-for-like replacement is the fastest way to restore a machine without reprogramming or changing the network setup.
Key Technical Data – Omron CJ1M-CPU11-ETN
- Series: Omron CJ1M (CJ-series)
- Product type: PLC CPU unit with built-in Ethernet
- Program capacity: 5K steps
- Data memory: 32K words
- Max. I/O points: 160
- Communication: Ethernet (built-in), RS-232C
- Programming languages: Ladder, SFC, ST, mnemonic
- Lifecycle: Discontinued (last shipment June 2021; repairs until March 2028)
Replacement Options
- CJ1M-CPU11-ETN: same reference, no program or network changes (this item)
- CJ2M-CPU31 + CP1W-CIF01: Omron’s official replacement (CJ2M with built-in Ethernet, plus an RS-232C option board)
- CJ2M-CPU11 + CJ1W-ETN21: Omron’s recommended replacement when the CJ1M’s web function is used
Note that Omron has also announced the discontinuation of the CJ2M-CPU3□ (end of June 2027), with the new CJ3M series as its successor. Our sales team can help you choose between a direct replacement and an upgrade.
Typical Applications
- Small and medium machines with modular PLC control
- Machines networked over Ethernet to HMIs, SCADA or other PLCs
- Direct replacement of failed CJ1M CPUs on existing machines
Buy Omron CJ1M-CPU11-ETN from Atlantech Drives
- Fast sourcing of obsolete PLCs, shipped worldwide
- 12-month warranty
- Senior commercial advice on replacement options and lead time
- Quick, no-obligation quotes: get a quote today
