CJ2M-CPU12 SYSMAC CJ2M CPU Unit 10K Steps RS-232C USB | Omron

The Original New Omron CJ2M-CPU12 is a compact CPU unit for the SYSMAC CJ series programmable logic controller (PLC) platform, designed for basic machine automation and OEM control systems requiring serial communication. With a program capacity of 10K steps, 32K words of data memory, and 32K words × 1 bank of extended memory (EM), this CPU delivers reliable performance for small to medium-scale automation applications. The integrated USB programming port simplifies connectivity, while the built-in RS-232C serial port enables direct communication with HMIs, barcode readers, and other serial devices. Up to 2,560 I/O points and three expansion racks allow scalable system expansion for packaging machinery, material handling, and general factory automation.

⚠️ Important Product Status Note:

This product is scheduled for end of production on March 31, 2028. This product remains available for maintaining existing installations while supplies last. For new designs, please consider the recommended replacement options.

Core Engineering Highlights:
10K steps program capacity (+20K steps function block memory) | 32K words data memory + 32K words × 1 bank EM | 0.04 μs LD instruction execution time | Built-in RS-232C serial port | USB programming port | 2,560 max I/O points / 40 units | 3 expansion racks max | 85–264 V AC or 24 V DC power supply (external) | 31 × 90 × 84.5 mm | 130 g weight

Key Features:

• Original New Omron CJ2M-CPU12 CPU unit

• 10K steps program capacity with 0.04 μs LD instruction execution time

• 32K words data memory (DM) plus 32K words × 1 bank extended memory (EM)

• Built-in RS-232C serial port for direct connection to serial devices

• Integrated USB programming port for fast, direct PC connection

• Supports up to 2,560 I/O points and 40 units with 3 expansion racks max

• Compatible with all existing CJ1 power supply, I/O, control, and communication units for easy migration

• Supports CJ-series I/O bus architecture

• DIN rail mounting for control cabinet installation

• Real-time clock with battery backup

• CX-Programmer (CX-One) programming software support

• CE, UL, CSA, NK, DNV, BV, LR, KR, ABS certified

• RoHS compliant

Applications:

• Small to medium machine automation and control systems

• Packaging machinery and OEM equipment

• Material handling and conveyor systems

• Factory automation and production line control

• Process monitoring and data acquisition

• Systems requiring RS-232C serial communication for HMIs, barcode readers, or printers

Technical Specifications:

System Compatibility:

• Compatible with SYSMAC CJ series I/O units, Special I/O Units, and CPU Bus Units

• Uses CJ-series I/O bus

• Mounts on CPU rack (CJ1W-BC series) with CJ1W-PA or CJ1W-PD series power supply

• Supports CJ1W-IC101 I/O control unit for multi-rack configurations

• Option board slot compatible with CP1W-CIF01 (RS-232C), CP1W-CIF11/CIF12-V1 (RS-422A/485)

• Programming software: CX-Programmer (CX-One) / Sysmac Studio

• Direct replacement for CJ1M-CPU12

Related Products:

• CJ1W-PA205R – Power supply unit, 100-240 V AC, 25 W, with RUN output

• CJ1W-PA202 – Power supply unit, 100-240 V AC, 14 W

• CJ1W-PD025 – Power supply unit, 24 V DC, 25 W

• CJ1W-PD022 – Power supply unit, 24 V DC, 19.6 W

• CJ1W-IC101 – Expansion I/O control unit, connects to right side of CPU

• CJ1W-II101 – Expansion I/O interface unit, up to 3 expansion racks

• CP1W-CIF01 – RS-232C option board for serial communication

• CP1W-CIF11 – RS-422A/485 option board (non-isolated)

• CP1W-CIF12-V1 – RS-422A/485 option board (isolated, 500 m max)

• CJ2M-MD211 – Pulse I/O module for CJ2M (NPN)

• CJ2M-MD212 – Pulse I/O module for CJ2M (PNP)

• CJ1W-ID211 – 16-point DC input unit

• CJ1W-OD212 – 16-point PNP transistor output unit

• CJ1W-OC211 – 16-point relay output unit

• CS1W-CIF31 – USB to RS-232C converter cable

• CP1W-CN221 – USB programming cable, 1.8 m

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Omron and SYSMAC are trademarks of Omron Corporation.