Omron CJ1M-CPU13-ETN CPU Unit with Built-in Ethernet for CJ-Series PLCs

The Omron CJ1M-CPU13-ETN is a compact CPU unit for the SYSMAC CJ-series programmable logic controllers, featuring integrated Ethernet functionality for seamless network integration. This CPU unit combines the processing power of the CJ1M platform with built-in Ethernet communications, eliminating the need for a separate Ethernet unit in many applications. The CJ1M-CPU13-ETN is designed for small to medium automation applications requiring network connectivity, machine control, and flexible I/O configuration, making it suitable for packaging machinery, material handling systems, and assembly equipment requiring network connectivity.

Key Specifications

• Model: CJ1M-CPU13-ETN V4.0 CPU Unit

• Product Series: SYSMAC CJ-series CJ1M CPU Units

• I/O Capacity: 640 points maximum

• Program Capacity: 20K steps (20,000 steps)

• Data Memory: 32K words (DM: 32K words, EM: 32K words × 1 bank)

• LD Instruction Execution Time: 0.1 μs

• Ethernet Function: Built-in (100BASE-TX, 10BASE-T)

• Function Block Support: Yes

• Expansion Racks: Up to 2 expansion racks maximum

• Maximum Units on CPU Rack: 10 units

• Maximum Units on Expansion Racks: 10 units per rack

• Current Consumption (5V): 0.82A

• Operating Temperature: 0°C to 55°C

Built-in Ethernet Functionality

The CJ1M-CPU13-ETN incorporates integrated Ethernet functionality, providing the main features of the CJ1W-ETN21 Ethernet Unit directly on the CPU. The built-in Ethernet supports 100BASE-TX and 10BASE-T physical layers, offering compatibility with both fast Ethernet and standard Ethernet networks. The CPU supports FINS communications service for seamless data exchange with other Omron PLCs and devices across the network. The Ethernet function allows connection of up to 254 nodes in a FINS network, providing scalability for expanding automation systems. The built-in FTP server enables file transfer for program backups, data logging, and recipe management.

Enhanced Processing Capacity

The CJ1M-CPU13-ETN provides expanded processing capacity compared to lower-end CJ1M models. With 20K steps of program memory and 32K words of data memory, the CPU supports more complex control applications requiring larger programs and more extensive data storage. The function block support enables structured, reusable programming for complex control logic, reducing development time and improving code maintainability. The LD instruction execution time of 0.1 μs ensures fast scan times even for moderately complex programs, supporting responsive machine control.

I/O Configuration and Expansion

The CJ1M-CPU13-ETN supports a maximum of 640 I/O points, suitable for medium-scale machine control applications with substantial I/O requirements. The CPU can accommodate up to 10 units on the CPU rack, with expansion capabilities of up to 2 expansion racks, each supporting up to 10 units. This configuration allows users to mix basic I/O modules, special I/O units, and CPU bus units to create custom I/O configurations. The expansion capability provides scalability for applications that may grow over time, protecting the initial investment in the CPU.

Function Block Programming Support

The CJ1M-CPU13-ETN includes function block programming support, enabling structured, reusable code for complex control applications. Function blocks encapsulate control logic into reusable components, simplifying program development, reducing coding errors, and improving code maintainability. This structured programming approach is particularly valuable for applications with repetitive control patterns, such as multi-zone temperature control, multi-axis positioning, and modular machine control. The function block support bridges the gap between traditional PLC programming and modern software engineering practices.

SYSMAC CJ-series Platform

The CJ1M-CPU13-ETN is built on the SYSMAC CJ-series platform, Omron's modular PLC system designed for machine automation applications. The CJ-series offers a wide range of CPU units, I/O modules, communication units, and special function modules, allowing users to configure controllers precisely for their application requirements. The platform supports various I/O configurations from small standalone machines to larger systems with distributed I/O. The common programming environment across the CJ-series simplifies engineering and training, reducing the learning curve for new projects.

The CJ1M low-end models (CJ1M-CPU11(-ETN)/CPU21) have different specifications for overhead processing time, pulse start time, number of subroutines, number of jumps, number of scheduled interrupts, and number of PWM outputs than the higher-end CJ1M models including the CJ1M-CPU13-ETN. The CJ1M-CPU13-ETN offers enhanced capabilities for more demanding applications.

Serial Communication Port

The CPU includes a built-in RS-232C serial port for connection to programming devices, HMIs, and other serial equipment. The serial port supports Host Link protocol for communication with host computers and other Omron devices. A D-SUB 9-pin male connector is provided for serial connection. The serial port can be used for program upload/download, data exchange with HMIs, and connection to barcode readers, printers, and other serial peripherals. An optional NT-AL001 RS-232C/RS-422A adapter can be used for extended distance communication.

Data Memory Architecture

The CPU provides 32K words of total data memory, organized as 32K words of DM (Data Memory) and 32K words of EM (Extended Memory) across 1 bank. This data memory capacity supports storage of process variables, recipe data, production counters, and other information required for control applications. The memory architecture supports efficient data handling for applications requiring data logging, recipe management, and process variable storage. The battery-backed memory retains critical data during power interruptions, eliminating the need for reprogramming after power cycles.

Industrial Applications

The Omron CJ1M-CPU13-ETN CPU unit is deployed across a wide range of industrial automation applications requiring network connectivity. In packaging machinery, it controls filling machines, sealing equipment, and labeling applicators with Ethernet connectivity for production reporting. In material handling, it manages conveyor systems, sortation equipment, and palletizers with network communication to supervisory systems. In assembly equipment, it coordinates part feeding, assembly operations, and quality testing with remote monitoring capabilities. The CPU's built-in Ethernet makes it particularly suitable for OEM machinery where network connectivity is required for production data collection and remote diagnostics.

Conclusion

The Omron CJ1M-CPU13-ETN CPU unit provides built-in Ethernet functionality with 20K steps program memory, 32K words data memory, and support for 640 I/O points. Its enhanced processing capacity, function block support, and built-in networking make it a practical solution for medium-scale machine automation applications requiring network connectivity.