Omron CJ1W-ETN21 Ethernet Communication Unit – TCP/IP, FTP, FINS, 1 Port

The Omron CJ1W-ETN21 is a reliable Ethernet communication unit for CJ-series PLCs, offering support for TCP/IP, UDP/IP, and Omron’s native FINS protocol. With built-in support for FTP and SMTP services, it allows seamless integration of control systems with enterprise-level applications, remote diagnostics, and file transfers.

Designed as a CPU Bus Unit, this module uses a single RJ45 port (10/100Base-TX) and installs directly into the CJ-series rack, making it a powerful and cost-effective networking interface for plant-wide automation systems.

Technical Specifications

Model: CJ1WETN21
Series: CJ1W
Product Type: Ethernet Communication Unit
Mounting Type: DIN rail via CJ-series rack
Dimensions (W × H × D): 31 × 90 × 65 mm
Weight (Unpacked): 100 g
Degree of Protection: IP20
Unit Type: CPU Bus Unit

Communication Interfaces

• Number of Ethernet Ports: 1 × RJ45
• Supported Speeds: 10Base-T / 100Base-TX (auto-sensing)
• Supported Protocols:
  • Ethernet TCP/IP
  • UDP/IP
  • FINS/UDP
  • FINS/TCP
  • FTP (File Transfer Protocol)
  • SMTP (Email Notification)
• Network Interface: IEEE 802.3 compliant
• Maximum Socket Connections: Refer to datasheet
• Transmission Speed: 10/100 Mbps full-duplex

Functional Capabilities

• FINS Routing: Enables remote PLC access and command execution
• Socket Services: Custom communication using TCP or UDP sockets
• FTP Server: Upload/download log files or recipes to/from the PLC
• Email Alerts: SMTP function allows sending event-based messages
• Diagnostics & Monitoring: Supports SNMP for network monitoring
• Configuration Software: CX-Integrator or Sysmac Studio

Mechanical & Installation

• Installation Method: Mounted into CJ-series rack (CPU Bus slot)
• Cooling Method: Natural convection
• Power Supply: Drawn from PLC backplane – no external supply required

Environmental Conditions

• Operating Temperature: 0 to 55°C
• Storage Temperature: –25 to +70°C
• Relative Humidity: 10% to 90% RH (non-condensing)
• Altitude: Up to 2000 m
• Vibration Resistance: Conforms to IEC 60068-2-6
• Shock Resistance: Conforms to IEC 60068-2-27

Applications

Perfect for:

• Remote PLC programming and monitoring via Ethernet
• Factory data collection via FTP to servers or HMIs
• Sending alerts and production reports via email (SMTP)
• Custom TCP/UDP communication to SCADA or PC systems
• Multi-station CJ-series PLC network environments

Key Features & Benefits

✅ Multi-Protocol Support: Ethernet TCP/IP, FTP, SMTP, and Omron FINS.

✅ Industrial-Grade Reliability: 10/100Base-TX Ethernet with auto-negotiation.

✅ Remote Access Ready: Perform programming, file transfers, and diagnostics remotely.

✅ Simple Rack Integration: Plugs directly into CJ CPU Bus Unit slot.

✅ Real-Time Monitoring: Built-in SNMP and socket service tools.

📦 Available from Drive Outlet Megastore

The Omron CJ1W-ETN21 empowers your CJ-series PLC with full Ethernet connectivity, ideal for data-driven control systems and remote operations.

Need help setting up FTP, socket communication, or FINS routing?
Speak with our integration team today.

Omron networking. Drive Outlet simplicity — seamless control over Ethernet.