Omron CJ2M-CPU12 PLC CPU Unit

USD 521.33

Compact PLC CPU with 10K-step program memory, 64K-word data memory, RS-232C, USB, and up to 2,560 I/O points.

SKU Omron-CJ2M-CPU12 Category
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Omron CJ2M-CPU12 PLC CPU Unit

Model Identifier CJ2M-CPU12
Official Part Number CJ2M-CPU12
GTIN Standard NA

Technical Overview

Compact CJ2M-series PLC CPU unit with 10K-step program capacity, 64K-word data memory, RS-232C serial communication, USB programming, and support for up to 2,560 I/O points across 3 expansion racks. Official Omron documentation and distributor listings identify it as a CPU module for CJ-series automation systems. The unit is designed for modular machine control where a small CPU footprint and expansion capability are required.

Key Features

  • 10K-step program capacity
  • 64K-word data memory
  • 32K-word EM bank support
  • Up to 2,560 local I/O points
  • Up to 3 expansion racks
  • Built-in RS-232C serial port
  • Built-in USB programming port
  • Compact modular CJ-series form factor

10K-step CPU with RS-232C and USB, expandable to 2,560 I/O points.

Technical Specification Matrix

ParameterValue
Program capacity10K steps
Data memory capacity64K words
EM bank capacity32K words x 1 bank
Maximum local I/O points2560
Maximum expansion racks3
Maximum expansion units40 units
Built-in communication portsRS-232C, USB
Basic instruction speed40 ns
System overhead time160 µs
Connector type9-pin D-Sub male
Product height (unpacked)90 mm
Product width (unpacked)31 mm
Product depth (unpacked)84.5 mm
Product weight (unpacked)130 g

Industrial Applications

1. Compact machine control for small assembly lines

The 10K-step CPU, 2,560-point I/O capacity, and 3-rack expansion support make it suitable for compact multi-station machines that need deterministic control with moderate I/O scaling.

Problem Solved

Provides a small-footprint controller for machines that outgrow micro PLCs but do not need a large high-end CPU.

10K steps2560 I/O3 expansion racksmodular PLC

2. Serially connected OEM equipment

Built-in RS-232C and USB ports support commissioning, legacy device integration, and service access in OEM equipment that still depends on serial peripherals.

Problem Solved

Eliminates the need for a separate serial gateway when integrating legacy instruments or terminals.

RS-232CUSB programming portlegacy serial integration

3. Panel-dense retrofit automation projects

Its compact 90 mm × 31 mm × 84.5 mm body and 130 g mass are well suited to retrofit panels where cabinet space is constrained but reliable PLC control is still required.

Problem Solved

Allows replacement of older controllers in tight enclosures without redesigning the panel layout.

compact PLC90 mm height31 mm width84.5 mm depth130 g
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