USD 393.09
5K-step PLC CPU with 64K-word memory, RS-232C, USB, and 2,560 I/O-point capacity for modular machine control.
CJ2M-CPU11 is a CJ-series CPU unit with 5K-step program capacity, 64K words total memory, 2,560 I/O points maximum, and built-in RS-232C plus USB programming communications. Omron documents it as a compact DIN-rail PLC CPU for modular machine control with up to 3 expansion racks and battery-backed memory. The official Omron lineup also lists the unit as 25K steps and 64K words, with 32K words data memory and 32K words x 1 bank EM; the manufacturer product page identifies the exact CJ2M-CPU11 model and family positioning. ([fa.omron.co.jp](https://www.fa.omron.co.jp/product/item/CJ2M-CPU11/en/))
| Parameter | Value |
|---|---|
| Program capacity | 5K steps |
| Total memory | 64K words |
| Data memory | 32K words |
| Extended memory | 32K words x 1 bank EM |
| Maximum I/O points | 2,560 |
| Maximum expansion racks | 3 |
| Communications | RS-232C, USB |
| Mounting type | DIN rail |
| Operating temperature | 0°C to 55°C |
| Weight | 130.18 g |
Well suited for a small-to-mid machine requiring a 5K-step control program, 2,560-point I/O capacity, and modular rack expansion without adding an external comms module.
Provides enough I/O and program memory for coordinated discrete machine logic in a small footprint.
Fits retrofit cells that must communicate with existing devices over RS-232C while still allowing USB-based setup and maintenance from a programming PC.
Eliminates the need for separate serial gateway hardware in compact retrofit projects.
Appropriate for control panels that need a lightweight CPU with battery backup and up to three expansion racks for incremental I/O growth.
Supports phased machine expansion without replacing the controller core.
