SJ1W-EIP21

Overview of Omron SJ1W-EIP21

The Omron SJ1W-EIP21 is an EtherNet/IP unit designed for the CJ-series PLCs, enabling high-speed, high-capacity network communications for industrial automation. With support for 100Base-TX Ethernet, it connects CJ1 and CJ2 series PLCs to EtherNet/IP networks, allowing up to 256 node connections and handling large volumes of tag data link communications.

Key Features of Omron SJ1W-EIP21

• EtherNet/IP Communication: Supports high-speed Industrial Ethernet with 10/100Base-TX and auto-negotiation for network flexibility and reliability.[web:513][web:514]
• Tag Data Link Capacity: Can handle over 180,000 words of tag data link, facilitating seamless data sharing between devices and PLCs.[web:513]
• Node Connectivity: Enables connection to up to 256 nodes over 256 connections per unit, supporting large-scale network integration.[web:513][web:514]
• Data Refresh Cycle: Adjustable packet interval from 0.5 ms to 10,000 ms, allowing customization of data refresh rates per connection.[web:513]
• Protocol Support: Includes FINS/UDP, FINS/TCP, SNMP, FTP, SNTP for diverse industrial communication needs.[web:514]
• Diagnostics and Monitoring: Comprehensive network status monitoring and error diagnostics through integrated tools.[web:513]
• Physical Specs: Compact dimensions of 31 × 90 × 65 mm (W × H × D) and lightweight at 94 g for easy mounting on CPU or expansion racks.[web:513][web:514]
• Compatibility: Compatible with NJ-series, CJ-series (CJ1, CJ2), CP1H, and NSJ series PLCs for versatile application.[web:514]
• Power Consumption: Consumes up to 0.41 A at 5 V DC.

Technical Specs of Omron SJ1W-EIP21

Model	SJ1W-EIP21
Communication Speed	10/100Base-TX Ethernet
Max Nodes Connected	256
Max Connections per Unit	256
Tag Data Link Capacity	184,832 words
Packet Interval Range	0.5 to 10,000 ms
Supported Protocols	FINS/UDP, FINS/TCP, SNMP, FTP, SNTP
Power Supply	5 V DC
Current Consumption	0.41 A max.
Dimensions (W×H×D)	31 × 90 × 65 mm
Weight	94 g
Compatible PLCs	CJ1, CJ2, NJ-series, CP1H, NSJ series

Applications / Use Case

The SJ1W-EIP21 enables seamless integration of Omron CJ-series PLCs into EtherNet/IP industrial networks, ideal for factory automation, process control, and systems requiring extensive networked I/O communication and diagnostics.

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Verification Links:
https://edata.omron.com.au/eData/Networks/EIP/CJ1W-EIP21_DS.pdf
https://www.omron-ap.com/products/family/1995/specification.html
https://www.mouser.com/catalog/specsheets/omron_cj1w-eip21_ds_e_7_1_csm1781.pdf