{"product_id":"omron-cj1w-scu31-v1-cj-series-serial-communications-unit","title":"Omron CJ1W-SCU31-V1 CJ Series Serial Communications Unit","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eEngineered for high-performance integration within industrial control architectures, the \u003cstrong\u003eOmron CJ1W-SCU31-V1\u003c\/strong\u003e functions as a highly versatile \u003cstrong\u003eserial communications module\u003c\/strong\u003e within the CJ-series PLC system. This CPU Bus Unit facilitates seamless, high-speed data exchange between the CPU and external peripheral devices via dual serial interfaces. Equipped with two RS-422A\/485 ports, the unit supports diverse communication protocols including Host Link, protocol macro, NT Link, and loopback testing to accommodate precise industrial networking configurations.\u003c\/p\u003e\n\n\u003cp\u003eWith firmware Unit Ver. 1.2 or later, the \u003cstrong\u003eCJ1W-SCU31-V1\u003c\/strong\u003e extends its capabilities to include Serial Gateway functionality, no-protocol communications, and 1:1 Host Link modes. For Modbus architectures, Unit Ver. 1.3 or later adds native Modbus-RTU slave mode support. The system architecture permits mounting up to 16 CPU Bus Units per CPU Rack or Expansion Rack, allocating 25 CIO words and 20 DM words for consistent cyclic and event-driven data transfer.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDual RS-422A\/485 serial ports optimized for balanced, long-distance communication.\u003c\/li\u003e\n  \u003cli\u003eBroad protocol compatibility featuring Host Link, protocol macro, and NT Link.\u003c\/li\u003e\n  \u003cli\u003eAdvanced connectivity modes including Serial Gateway, no-protocol, and Modbus-RTU slave (dependent on unit version).\u003c\/li\u003e\n  \u003cli\u003eEfficient backplane data exchange using 25 words in the CPU Bus Unit CIO Area.\u003c\/li\u003e\n  \u003cli\u003eDedicated DM Area allocations of 10 words per port for simplified configuration and parameter settings.\u003c\/li\u003e\n  \u003cli\u003eSimple Backup Function allows backing up protocol macro data directly to the CPU Unit's memory card (supported on CJ1-H and CJ1M CPU Units).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSCADA and HMI integration in manufacturing and assembly environments.\u003c\/li\u003e\n  \u003cli\u003eModbus-RTU device monitoring and control in utility and water treatment systems.\u003c\/li\u003e\n  \u003cli\u003eDistributed control networks utilizing protocol macro configurations for proprietary serial devices.\u003c\/li\u003e\n  \u003cli\u003eMaterial handling, warehousing, and process automation lines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003cstrong\u003eCategory\u003c\/strong\u003e\n      \u003cstrong\u003eSpecification Parameter\u003c\/strong\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eManufacturer\u003c\/td\u003e\n      \u003ctd\u003eOmron\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePart Number \/ Model\u003c\/td\u003e\n      \u003ctd\u003eCJ1W-SCU31-V1\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eClassification\u003c\/td\u003e\n      \u003ctd\u003eCPU Bus Unit\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePort 1 Interface\u003c\/td\u003e\n      \u003ctd\u003eRS-422A\/485\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePort 2 Interface\u003c\/td\u003e\n      \u003ctd\u003eRS-422A\/485\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProtocols (Port 1)\u003c\/td\u003e\n      \u003ctd\u003eHost Link, protocol macro, NT Link, loopback test\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProtocols (Port 2)\u003c\/td\u003e\n      \u003ctd\u003eHost Link, protocol macro, NT Link, Serial Gateway, no-protocol, Modbus-RTU slave (Unit Ver. 1.3 or later)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaximum Mountable Units\u003c\/td\u003e\n      \u003ctd\u003eUp to 16 Units per Rack (including other CPU Bus Units)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCIO Area Allocation\u003c\/td\u003e\n      \u003ctd\u003e25 words\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDM Area Allocation\u003c\/td\u003e\n      \u003ctd\u003e20 words (10 words per port)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n      \u003ctd\u003e380 mA (from 5V DC backplane power supply)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eWeight\u003c\/td\u003e\n      \u003ctd\u003e0.11 kg maximum\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eInterface Port\u003c\/th\u003e\n      \u003cth\u003ePhysical Standard\u003c\/th\u003e\n      \u003cth\u003eSupported Connection Modes\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePort 1\u003c\/td\u003e\n      \u003ctd\u003eRS-422A\/485 (2-wire\/4-wire)\u003c\/td\u003e\n      \u003ctd\u003eHost Link, protocol macro, NT Link, loopback test\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePort 2\u003c\/td\u003e\n      \u003ctd\u003eRS-422A\/485 (2-wire\/4-wire)\u003c\/td\u003e\n      \u003ctd\u003eHost Link, protocol macro, NT Link, Serial Gateway, no-protocol, Modbus-RTU slave\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAlways shut off the power supply to the PLC system before mounting or removing the CPU Bus Unit.\u003c\/li\u003e\n  \u003cli\u003eSlide the unit securely into the designated slot on the CJ-series CPU Rack or Expansion Rack, ensuring the locking sliders are fully engaged.\u003c\/li\u003e\n  \u003cli\u003eConfigure terminal block connections and termination resistors according to your RS-422A\/485 network topology specifications.\u003c\/li\u003e\n  \u003cli\u003eIsolate communication cables from high-voltage wiring to minimize electromagnetic interference.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Omron","offers":[{"title":"Default Title","offer_id":53077921890667,"sku":"CJ1W-SCU31-V1","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/cj1w-scu31-v1-n1jevv1chyq.png?v=1775733542","url":"https:\/\/www.plcprotech.com\/pt\/products\/omron-cj1w-scu31-v1-cj-series-serial-communications-unit","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}