During technical comparisons, CJ1W-ETN21 appears alongside Siemens PLC, Omron SMPS 24V 10A and Nx1P2 1040Dt1 so engineers assess signal types, ingress protection, and ambient tolerances accurately.
Omron CJ1W-ETN21 Programmable Logic Controller
The Omron CJ1W-ETN21 Programmable Logic Controller (PLC) Ethernet Unit provides high-speed Ethernet communication for Omron PLC systems supporting data links and FINS/TCP or FINS/UDP protocols. It features a 10Base-T/100Base-TX interface for reliable network connectivity, enabling flexible communication between PLCs, computers, and devices. With support for 64 FINS nodes and 128 UDP nodes, it ensures efficient data transfer and wide system scalability. Designed for IP address configuration through the CX-Programmer or DHCP, it delivers smooth integration into industrial Ethernet networks. Manufactured by Omron, part of the Omron Programmable Logic Controller family, available under the Omron CJ1W Series.
| Brand | Omron |
| Product Type | Programmable Logic Controller |
| Model Number | CJ1W-ETN21 |
| Specification | Value |
|---|---|
| Product name | Ethernet Unit |
| I/O system | CJ I/O Bus |
| Expansion unit type | CPU Bus Unit |
| Communicati ons cable | 100Base-TX |
| Maximum number of Units | 1 |
| Current consumption (5 V) | 0.37 A |
Trusted by automation professionals worldwide, the Omron CJ1W-ETN21 is designed to simplify communication in demanding factory networks. As part of the versatile CJ1W expansion series, this Omron Ethernet Unit brings Ethernet connectivity directly to Omron PLC CJ1W Series, enabling data exchange, monitoring, and system integration with ease. Engineers across manufacturing plants, OEM setups, and process industries rely on it for robust networking where precision and stability are critical. With EEAT-driven design, this model is not just a communication module but a dependable gateway to connected industrial control.
The CJ1W-ETN21 is equipped with a single RJ45 port that supports both 100Base-TX and 10Base-T standards, ensuring compatibility with modern and legacy Ethernet networks. It provides reliable communication using multiple protocols including TCP/IP for general networking, UDP/IP for fast and lightw8 data exchange, FTP for file transfers, SMTP for email alarms, and FINS for seamless integration with Omron controllers. This versatility makes the unit well-suited for industries ranging from packaging and food processing to automotive and electronics, where quick access to production data and remote diagnostics are vital.
From a technical standpoint, the Omron CJ1W-ETN21 Ethernet Unit integrates smoothly into CJ1W PLC racks without requiring major redesigns. The module enables efficient communication between multiple devices, including HMIs, SCADA systems, MES layers, and third-party controllers. Its design ensures stable operation in harsh environments, withstanding factory conditions such as electrical noise, vibration, and temperature fluctuations. Maintenance engineers benefit from its straightforward setup and diagnostic tools that reduce downtime and simplify troubleshooting, allowing faster recovery from communication failures. Dealers, distributors, and wholesalers recognize the value of this unit as a critical networking component that enhances automation scalability.
Another advantage of the ENT21 Omron module is its support for advanced diagnostics and monitoring features. Engineers can review connection status, monitor network loads, and perform health checks without additional devices, streamlining plant maintenance. The Ethernet Unit also supports direct data logging and alarm reporting through email, making it highly practical for industries moving toward digital transformation. This feature-rich design aligns with Industry 4.0 requirements, where seamless communication between devices, systems, and enterprise-level platforms is essential.
In terms of reliability, the Omron CJ1W-ETN21 Programmable Logic Controller (PLC) accessory is built with robust hardware that provides consistent communication even under continuous operation. It is widely used in distributed control systems where scalability and communication integrity are non-negotiable. For small machine builders, the module offers compact installation without compromising performance. For large process plants, it delivers the networking backbone required for uninterrupted production. Engineers trust the Omron CJ1W PLC expansion because it balances ease of integration with long-term dependability.
Common applications include production data acquisition, real-time quality monitoring, energy management, and remote troubleshooting of automated lines. By enabling Ethernet-based integration, the CJ1W ENT21 Omron empowers companies to achieve higher efficiency, reduce downtime, and improve transparency across industrial operations. Its seamless compatibility with the Omron PLC CJ1W-ENT21 family ensures that businesses can scale automation systems without major hardware changes, reducing total cost of ownership.
Engineers searching for models like CJ1W-ENT21, Omron CJ1W-ENT21, Omron PLC CJ1W-ENT21, Omron CJ1W-ENT21 Programmable Logic Controller (PLC), or CJ1W ENT21 Omron often evaluate this Ethernet Unit as the networking solution of choice. With strong adoption among wholesalers, dealers, and distributors, the Omron ENT21 consistently proves itself as a rugged, efficient, and future-ready module. For automation professionals, the ETN21 Omron is not just an add-on β it is an essential component in building connected, reliable, and scalable industrial control systems.
Related Products
