omronSYSMAC CJ-series CJ2M CPU Units, Pulse I/O Modules

Since 2001, CJ1M-series PLCs are in 

control of a wide variety of 

applications worldwide. 

The accumulated experience and 

advancements in technology now 

result in CJ2M; fully compatible, yet 

fully new.

• Increased performance, and increased memory capacity

• Up to 40 I/O unit on any CPU

• Pulse I/O Modules add position control functions to any CPU

• USB for plug-and-play access to the PLC

• All models available with or without Ethernet port

• Choice of serial port plug-in modules

Features

• Five variations in program capacity from 5K steps to 60K steps; scale the CPU to your application needs.

• Faster processors; LD instruction execution time is reduced to 40 ns, floating point trigonometrics in less than 1 μs.

• Optional Pulse I/O Modules can be mounted to enable positioning functions for up to four axes. The module provides high-speed counters, 

interrupt inputs and pulse train/PWM outputs. (CJ2M CPU Units with Unit Version 2.0 or Later) 

• Faster Function Block calls and execution, faster interrupt handling, less overhead time.

• Added execution memory for Function Blocks allows structured, object-oriented programming even in entry-level CPUs.

• General-purpose Ethernet port supports EtherNet/IP tag-based data links, connection to Support Software, communications between PLCs, 

FTP data transfers, and more (CJ2M-CPU3@).

• Standard USB port on all models allows Support Software to connect directly through standard USB cable.

• A Serial Option Module can be mounted to add RS-232C or RS-422A/485 communications ports (CJ2M-CPU3@).

• Compatible with all existing CJ1 power supply-, I/O-, control- and communication units.

Ordering Information

International Standards

• The standards are abbreviated as follows: U: UL, U1: UL (Class I Division 2 Products for Hazardous Locations), C: CSA, UC: cULus, 

UC1: cULus (Class I Division 2 Products for Hazardous Locations), CU: cUL, N: NK, L: Lloyd, and CE: EC Directives.

• Contact your OMRON representative for further details and applicable conditions for these standards.

CJ2M CPU Units (Built-in EtherNet/IP)

Note: Add 0.15A/Unit when using NT-AL001 RS-232C/RS-422A Adapters.

Add 0.04A/Unit when using CJ1W-CIF11 RS-422A Adapters.

Add 0.20A/Unit when using NV3W-M@20L Programmable Terminals.

Serial Communications Option Boards (Only CJ2M-CPU3@)

The serial communications port can be equipped by installing the serial communications option board to the option board slot in front of CPU unit.

Note: It is not possible to use a CP-series Ethernet Option Board (CP1W-CIF41), LCD Option Board (CP1W-DAM01) with a CJ2M CPU Unit.

* The following modes cannot be used: 1:1 NT Link, Serial Gateway converted to Host Link FINS, 1:1 Link Master, and 1:1 Link Slave. 

CJ2M-CPU3@/-CPU1@/-MD21@

Pulse I/O Modules (Only CJ2M CPU Unit with Unit Version 2.0 or Later) 

Optional Pulse I/O Modules can be mounted to enable pulse I/O. Up to two Pulse I/O Modules can be mounted to the left side of a CJ2M CPU Unit

Note: Connectors are not provided with Pulse I/O Modules. Purchase the following Connector, an OMRON Cable with Connectors for Connector 

Terminal Block Conversion Units, or an OMRON Cable with Connectors for Servo Relay Units.

Connecting to Pulse I/O Modules On wiring, refer to Pulse I/O Modules Connector Wiring Methods

External Interface

CJ2M-CPU3@ (CJ2M with Built-in EtherNet/IP)

A CJ2M-CPU3@ provides two communications ports for external interfaces: a peripheral (USB) port and an EtherNet/IP port.

The Pulse I/O functions of the CJ2M can be used by mounting a Pulse I/O Module. Up to two Pulse I/O Modules can be connected to the left side 

of a CJ2M CPU Unit. 

Serial ports can be added by mounting a Serial Communications Option Board (sold separately) in an option slot. 

CJ2M-CPU1@

A CJ2M-CPU1@ provides two communications ports for external interfaces: a peripheral (USB) port and a serial port.

The Pulse I/O of the CJ2M can be used by mounting a Pulse I/O Module. Up to two Pulse I/O Modules can be connected to the left side of a CJ2M 

CPU Unit.