{"product_id":"omron-cj1w-eip21-cj-series-ethernet-ip-unit","title":"Omron CJ1W-EIP21 CJ Series EtherNet\/IP Unit","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eFacilitating high-speed industrial Ethernet communications within modular control architectures, the \u003cstrong\u003eOmron CJ1W-EIP21\u003c\/strong\u003e functions as a CPU Bus Unit designed to interface PLC controllers directly with industrial EtherNet\/IP networks. This unit enables both high-speed \u003cstrong\u003etag data links\u003c\/strong\u003e (implicit messaging) for real-time I\/O control and \u003cstrong\u003emessage communications\u003c\/strong\u003e (explicit messaging) for explicit data exchange. Integrating seamlessly onto either local CPU racks or expansion racks, it bridges logical plant-floor control layers with supervisory SCADA, MES, or enterprise database environments without requiring dedicated external gateways.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003eSupport for implicit (cyclic) tag data links and explicit CIP message communications.\u003c\/li\u003e\n  \u003cli\u003eFlexible installation across NJ-series systems, CJ-series platforms, and CP1H micro-controllers.\u003c\/li\u003e\n  \u003cli\u003eDynamic IP address configuration options including BOOTP and rotary node address switches.\u003c\/li\u003e\n  \u003cli\u003eSimultaneous multi-protocol handling including EtherNet\/IP, FTP client\/server, and FINS TCP\/IP communications.\u003c\/li\u003e\n  \u003cli\u003eComprehensive diagnostics via built-in LED indicators and system status variables in the PLC memory map.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003eDistributed I\/O integration and control across multi-rack PLC topologies.\u003c\/li\u003e\n  \u003cli\u003ePeer-to-peer processor interlocking in high-speed manufacturing assembly lines.\u003c\/li\u003e\n  \u003cli\u003eSCADA, HMI, and MES system interfacing for real-time performance tracking and data acquisition.\u003c\/li\u003e\n  \u003cli\u003eMotion and variable frequency drive orchestration via Ethernet-based control loops.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold; width: 40%;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eOmron Industrial Automation\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eCJ1W-EIP21\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eUnit Classification\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eCJ-series CPU Bus Unit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eSupported Platforms\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eNJ-series, CJ-series, CP1H-series PLCs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003ePhysical Mounting Locations\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eCPU Rack, Expansion Rack\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eMaximum Units per System\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eNJ System: 4 max | CJ\/NSJ System: 8 max | CP1H System: 2 max\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eMedia Access Control (MAC)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eCSMA\/CD\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eModulation Method\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eBaseband\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eTransmission Topology\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eStar formation (via switching hubs)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eBaud Rate\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e100 Mbit\/s (100Base-TX)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eMaximum Segment Distance\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e100 meters (node to network switch\/hub)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eInternal Current Consumption\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e410 mA maximum at 5 V DC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eDimensions (H x W x D)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e90 mm x 31 mm x 65 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eUnit Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e0.094 kg (94 g)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003e1.5 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #e2e8f0; text-align: left;\"\u003e\n        \u003cth style=\"padding: 10px; font-weight: bold;\"\u003eInterface Component\u003c\/th\u003e\n        \u003cth style=\"padding: 10px; font-weight: bold;\"\u003eDescription \/ Pin Assignment\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eRJ45 Connector\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eStandard 8-pin modular connector for 100Base-TX Ethernet cable (Category 5\/5e shielded twisted pair recommended).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eRotary Switches\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eTwo hex decimal rotary switches (x16 and x1) located on the front panel to configure the hardware node IP address suffix.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 10px; font-weight: bold;\"\u003eLED Indicators\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px;\"\u003eRUN (Green), ERC (Red), ERH (Red), MS (Green\/Red), NS (Green\/Red), LNK\/ACT (Yellow).\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eBased on industrial commissioning logs, the configuration and management of the CJ1W-EIP21 require precise adherence to network bandwidth constraints and configuration rules.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe CJ1W-EIP21 can directly replace older CJ1W-ETN21 Ethernet modules in legacy network topographies, though configuration steps differ. When migrating to an NJ-series controller platform, the unit's maximum allowable instances drop from 8 units (CJ-series limit) to 4 units due to increased backplane bandwidth demands. Ensure the unit's firmware matches the Sysmac Studio or CX-Programmer library version to avoid catalog mismatch faults during upload.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eA common real-world failure mode occurs when Tag Data Link (implicit messaging) connections saturate the unit's maximum packet processing rate (PPS). Keep track of your packet limits using the Network Configurator tool. If the cumulative packet-per-second limit is exceeded, cyclic communications may time out, throwing an 'ERH' (EtherNet\/IP Unit Error) status. To alleviate this, adjust the Requested Packet Interval (RPI) configurations upward for non-critical monitoring nodes.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eTo minimize high-frequency electrostatic interference on plant-floor environments, you must use double-shielded STP Cat 5e (or better) cabling. Clamp the shield securely to the rack's functional ground bar. When utilizing the rotary switches on the front bezel to set the IP address, note that the default hardware setting reads the node address as part of the Class C IP scheme (e.g., 192.168.250.X). If custom routing or non-standard subnets are required, set the rotary switches to '00' to enable software-configured IP parameters via CX-Programmer.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 15px; margin-bottom: 1.5rem; color: #9b2c2c;\"\u003e\n  \u003cstrong\u003eCRITICAL WARNING:\u003c\/strong\u003e Hazardous voltage levels can cause severe electrical shock or equipment damage. Prior to installing, removing, or wiring any CPU Bus Unit, completely de-energize the entire rack power supply. Wait at least 5 minutes to allow residual bus charge to fully bleed off before physically decoupling any module.\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 12px; font-size: 14px;\"\u003e1\u003c\/div\u003e\n  \u003cp style=\"color: #2d3748; margin: 0;\"\u003eAlign the top hook of the CJ1W-EIP21 module into the mounting slot of the CJ\/NJ-series backplane.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 12px; font-size: 14px;\"\u003e2\u003c\/div\u003e\n  \u003cp style=\"color: #2d3748; margin: 0;\"\u003ePivot the unit downward until the bottom connector snaps securely into the bus socket on the backplane.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 12px; font-size: 14px;\"\u003e3\u003c\/div\u003e\n  \u003cp style=\"color: #2d3748; margin: 0;\"\u003eTighten the upper and lower mounting screws to secure the chassis. Ensure they are tightened to the recommended torque of 0.4 N-m.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 12px; font-size: 14px;\"\u003e4\u003c\/div\u003e\n  \u003cp style=\"color: #2d3748; margin: 0;\"\u003eInsert the RJ45 Ethernet patch cord until the locking tab clicks cleanly into place. Ensure proper strain relief is applied to prevent physical pull on the port.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Omron","offers":[{"title":"Default Title","offer_id":53077909012843,"sku":"CJ1W-EIP21","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/cj1w-eip21-qos20vpxso1.png?v=1775733507","url":"https:\/\/www.plcprotech.com\/de\/products\/omron-cj1w-eip21-cj-series-ethernet-ip-unit","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}