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Part of the Omron CJ-Series PLCs series — see the full model table, lifecycle status and replacement parts.

Omron CJ1M-CPU12 — front face of the CJ1M-series 10K-step CPU showing the LED status indicators, the CJ1M-CPU12 type label, the peripheral port on the left, the RS-232C port on the right and the CompactFlash card slot under the front cover flap

Omron CJ1M-CPU12 — 10K-Step CPU, 320 I/O

SKU: CJ1M-CPU12

USD 135.00

Omron CJ1M-CPU12 10K-step CPU, 320 I/O, RS-232C + peripheral port, CX-Programmer. In stock, China shipping.

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Product Overview

The Omron CJ1M-CPU12 is a CJ1M-family 10K-step CPU unit for the CJ-series modular PLC rack, manufactured by Omron Corporation. Hengyixin Automation stocks this controller in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports.

The CPU runs 10 Ksteps of program memory with 32 Kwords of DM data memory and no Extended Memory banks. Maximum local I/O is 320 points across up to 10 CJ-series I/O modules on the CPU rack only — no expansion-rack support. LD instruction time is 100 ns; MOV is 0.3 us. The front face carries one peripheral port, one RS-232C port, and a CompactFlash slot for backup and project transfer.

The peripheral port connects to CX-Programmer via a CS1W-CN226 or CS1W-CN626 cable. The RS-232C port runs Host Link, NT Link, no-protocol, and Modbus-RTU. Power comes from a CJ1W-PA202 (AC) or CJ1W-PD022 (DC) supply on the same rack. For the same family with built-in I/O, pick the CJ1M-CPU21.

Key Features

  • CJ1M-series 10K-step CPU, 320 local I/O points max, 10 CJ-series I/O modules on one CPU rack, no expansion rack
  • 32 Kwords DM data memory, LD 100 ns / MOV 0.3 us, up to 1,024 subroutines and 2 scheduled interrupts
  • Built-in peripheral port for CX-Programmer and built-in RS-232C for Host Link / NT Link / Modbus-RTU
  • CompactFlash card slot for backup, logging, project transfer, DIN-rail mount on the CJ1W-PA202 / CJ1W-PD022 supply
  • SKU: CJ1M-CPU12
  • Series: Omron CJ-series modular PLC, CJ1M CPU family
  • I/O: 320 points

Best-Fit Applications

  • Sequencer for a small packaging machine with up to 10 I/O modules on one local rack and 320 I/O points total
  • Distributed auxiliary control cabinet on a wastewater-treatment skid that uses the Modbus-RTU port to poll a few inverters
  • Spare replacement on a legacy CJ1M rack where the existing CPU has reached end of life and the same 10K-step / 320 I/O footprint is required

Buying Checklist

  • Pick the CJ1M-CPU12 for a CJ1M-series 10K-step CPU on a single local rack with up to 320 I/O points and built-in RS-232C.
  • Pick the CJ1M-CPU21 instead when the cabinet needs built-in pulse I/O on the same CJ1M form factor.
  • Pick the CJ1W-PA202 / CJ1W-PD022 power supply to match this CPU on the same CJ-series rack.

Technical Specifications

Manufacturer Omron Corporation (Japan)
Series Omron CJ-series modular PLC, CJ1M CPU family
Model / SKU CJ1M-CPU12
Program Capacity 10 Ksteps
Data Memory 32 Kwords DM (no Extended Memory banks)
Local I/O 320 points max on one CPU rack, no expansion-rack support
Modules per Rack Up to 10 CJ-series I/O modules on the CPU rack
Instruction Speed LD 100 ns (0.1 us), MOV 0.3 us, system overhead 0.5 ms
Built-in Ports 1 peripheral port (CS1W-CN226 / CN626 cable) + 1 RS-232C (Host Link, NT Link, no-protocol, Modbus-RTU)
Subroutines / Interrupts 1,024 subroutine / jump levels, 2 scheduled interrupts
Option Card CompactFlash card slot for backup, logging, project transfer
Programming / Power CX-Programmer (CX-One suite); 24 VDC supply from CJ1W-PD022 or 100-240 VAC from CJ1W-PA202 on the same rack

FAQ for CJ1M-CPU12

What is the Omron CJ1M-CPU12 used for?
It is the CJ1M-family 10K-step CPU unit for a CJ-series modular PLC rack. It runs a 10 Kstep program with 32 Kwords of DM memory, drives up to 320 local I/O points across 10 I/O modules, and connects to CX-Programmer via the peripheral port and to HMIs / drives via the RS-232C port.
CJ1M-CPU12 vs CJ1M-CPU11 - what is the difference?
The CJ1M-CPU12 has 320 I/O and 10 Ksteps. The CJ1M-CPU11 has 160 I/O and 5 Ksteps on the same CJ1M form factor. Pick the CPU12 for larger local I/O counts and the CPU11 for the smallest panel builds.
Does the CJ1M-CPU12 support expansion racks?
No. The CJ1M-CPU12 supports a single local CPU rack only, with up to 10 CJ-series I/O modules. For expansion-rack support, pick a CJ1H or CJ2-series CPU.
How do I connect CX-Programmer to the CJ1M-CPU12?
Use the peripheral port on the front face with a CS1W-CN226 USB-to-peripheral cable or a CS1W-CN626 RS-232C-to-peripheral cable. Set DIP switch 5 ON to force toolbus on the RS-232C port, or OFF to use the user-defined serial parameters from the PLC Setup.
Does the CJ1M-CPU12 have built-in pulse outputs?
No. The CJ1M-CPU12 has no built-in pulse I/O or positioning outputs. Motion tasks require a separate CJ1W-NC position-control module on the same rack. The CJ1M-CPU21 / CPU22 / CPU23 add built-in pulse I/O on the same form factor.

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