Description
Integrating programmable logic controllers into enterprise networks requires reliable, high-speed communication interfaces. The Omron CS1W-ETN21 is a robust Ethernet unit designed specifically for the Omron CS-series PLCs. Acting as a CPU Bus Unit, this module provides 100BASE-TX (and 10BASE-T) communication interfaces to seamlessly bridge your industrial automation setup with local area networks, SCADA systems, and high-level industrial software.
With its robust support for various protocols and communication services, the CS1W-ETN21 enables advanced operations such as FINS (Factory Interface Network Service) communications, TCP/IP and UDP/IP socket services, and an integrated FTP server. This versatility allows engineering teams to perform remote programming, diagnostics, and high-capacity data transfers with minimal system overhead.
Features
- Compatible with Omron CS1-series PLC systems as a CPU Bus Unit.
- Supports dual-rate physical connections: 100BASE-TX and 10BASE-T.
- Supports up to 4 Ethernet modules per CPU system (including Expansion Racks) for scalable network architectures.
- Embedded FTP server functionality allows direct file transfers of PLC memory files.
- Enables FINS messaging over both TCP/IP and UDP/IP protocols.
- Comprehensive diagnostic and monitoring capabilities through integrated status LEDs.
Applications
- High-speed manufacturing data collection and factory-floor integration.
- SCADA and HMI communications in automotive, food & beverage, and material handling systems.
- Remote PLC programming, monitoring, and program backup operations.
- Data exchange between disparate distributed control systems over Ethernet networks.
Technical Specifications
| Manufacturer |
Omron |
| Model / Part Number |
CS1W-ETN21 |
| Unit Classification |
CS-series CPU Bus Unit |
| Physical Layer |
100BASE-TX, 10BASE-T |
| Transmission Media |
Category 5 or higher twisted-pair cable (shielded) |
| Maximum Number of Units |
4 units maximum (including Expansion Racks) |
| Current Consumption |
380 mA maximum at 5 V DC |
| Supported Services |
FINS communications (TCP/IP and UDP/IP), FTP server, Socket services, Mail send/receive, DNS client |
| Dimensions (W x H x D) |
35 mm x 130 mm x 101 mm |
Connections and Interfaces
| Interface / Indicator |
Description |
| RJ45 Port |
8-pin modular connector for 100BASE-TX/10BASE-T Ethernet connection |
| RUN LED |
Green indicator showing normal unit operation status |
| ERC LED |
Red indicator signaling an internal unit error or configuration issue |
| ERH LED |
Red indicator signaling an error in CPU Bus Unit communication or setup |
| LNK/ACT LED |
Yellow indicator displaying network link establishment and transmission activity |
Installation Guidelines
- Ensure the PLC rack power supply is completely switched off before inserting or removing the Ethernet unit.
- Securely mount the unit into the assigned CPU Bus Unit slot on the CS1 CPU Rack or Expansion Rack.
- Use high-quality shielded twisted-pair (STP) Category 5 (or higher) cables for 100BASE-TX connections to prevent electromagnetic interference in high-noise environments.
- Properly ground the PLC rack system to the industrial-grade earth ground terminal to stabilize communications and prevent transient voltage damage.
Compliance and Certifications
- CE Compliant
- UL Listed
- cULus Certification