{"product_id":"mitsubishi-electric-qj71gp21s-sx-melsec-q-series-cc-link-ie-controller-network-unit","title":"Mitsubishi Electric QJ71GP21S-SX MELSEC Q Series CC-Link IE Controller Network Unit","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eTo establish deterministic, high-speed backbone communications within a MELSEC Q Series control architecture, the \u003cstrong\u003eMitsubishi Electric QJ71GP21S-SX\u003c\/strong\u003e CC-Link IE Controller Network Unit serves as a high-performance fiber-optic interface. Operating on a gigabit transmission line, this module coordinates high-volume data exchanges using a token ring method across a dual-loop path topology. Designed with a dedicated external power supply terminal, the \u003cstrong\u003eQJ71GP21S-SX\u003c\/strong\u003e ensures network loop integrity is fully maintained even if individual PLC base units are de-energized, preventing ring segmentation in critical manufacturing plants.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1 Gbps Transmission Speed:\u003c\/strong\u003e Utilizes high-bandwidth gigabit Ethernet physical layers to execute high-speed, cyclic transmissions across the industrial network.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRedundant Dual-Loop Path:\u003c\/strong\u003e Employs a double-loop optical fiber configuration that executes auto-loopback routing instantly upon cable damage or station power failures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExternal Power Supply Support:\u003c\/strong\u003e Accepts DC 24V auxiliary power to keep communication circuits operational independently of the host PLC backplane status.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Station Configuration:\u003c\/strong\u003e Connects up to 120 normal stations when coupled with Universal QCPU management units, extending control across plant environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLarge Link Capacity:\u003c\/strong\u003e Accommodates up to 32K points for link relays (LB) and 128K points for link registers (LW) in extended transmission mode.\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: 1rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomotive Assembly Plants:\u003c\/strong\u003e High-speed synchronization of multi-axis assembly bays and welding robots across wide shop floors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater and Wastewater Treatment:\u003c\/strong\u003e Long-distance network loops connecting isolated pumping substations up to 550 meters apart without repeater stations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePaper \u0026amp; Pulp Manufacturing:\u003c\/strong\u003e High-throughput, noise-immune optical communication lines routing real-time process control data through high-interference processing zones.\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    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2b6cb0;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eSpecification Value\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: 0.75rem; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eMitsubishi Electric\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eModel Reference\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eQJ71GP21S-SX\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eNetwork Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eCC-Link IE Controller Network\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eCommunication Speed\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e1 Gbps\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eTransmission Path Format\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eDouble loop (Token ring method)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eMaximum Stations\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e120 stations (with Universal QCPU management station)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eOptical Fiber Spec\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eGraded-index (GI) multi-mode optical fiber (1000BASE-SX)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eConnector Interface\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eDuplex LC type connector\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eLaser Safety Class\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eClass 1 (JIS C 6802, IEC 60825-1)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eMaximum Loop Length\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e66,000 meters (with 120 units connected)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eInter-Station Distance\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eMax. 550 meters\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eExternal Power Input\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eDC 20.4 V to 31.2 V (Current consumption: 0.28 A)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eInternal DC 5V Consumption\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0.90 A\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eOccupied I\/O Points\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e48 points (2 slots required: 16 empty points + 32 intelligent points)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eDevice Dimensions\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e98 mm (H) x 55.2 mm (W) x 90 mm (D)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eNet Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0.28 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e1.30 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 #2b6cb0;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eConnector \/ Terminal\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003ePhysical Form\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold;\"\u003eFunctional 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: 0.75rem; font-weight: bold;\"\u003ePORT 1\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eDuplex LC Optical Interface\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003ePrimary network transmit\/receive fiber-optic connection (Channel 1)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003ePORT 2\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eDuplex LC Optical Interface\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eSecondary network transmit\/receive fiber-optic connection (Channel 2)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003e24VDC Terminal Block\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eScrew-clamp connection\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eExternal power input (DC 20.4V to 31.2V) to power loop transceiver during PLC down-time\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\n\u003ch4\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe \"S\" suffix identifies this model as having external power supply capabilities. While it maintains backward code compatibility with the standard QJ71GP21-SX unit in GX Works2 or GX Developer programming environments, replacing a standard unit with the \u003cstrong\u003eQJ71GP21S-SX\u003c\/strong\u003e requires external DC 24V field wiring to leverage its loop backup protection function. Always verify your current configuration utility parameters when shifting between high-performance and universal QCPU backplanes, as maximum node counts scale from 64 to 120.\u003c\/p\u003e\n\n\u003ch4\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eMulti-mode GI fibers must conform strictly to 1000BASE-SX specifications. Inserting standard telecom single-mode fibers will cause immediate transmitter saturation or high optical attenuation faults. Ensure the bend radius of the optical fiber runs inside enclosures does not drop below the manufacturer's specified limit to avoid micro-bending losses, which directly generate network-level link-loss anomalies and token drops.\u003c\/p\u003e\n\n\u003ch4\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eBefore powering up the system, use a calibrated optical power meter to confirm fiber run losses are well within the 1000BASE-SX link budget. Ensure that Port 1 Out is cross-patched to Port 2 In on downstream nodes as per standard dual-loop layouts. When configuring redundant tracks, the external auxiliary DC supply must be powered through a dedicated class 2 power source with clean grounding to prevent industrial noise and transient surges from interfering with the gigabit transceivers.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem; color: #9b2c2c;\"\u003e\n  \u003cstrong\u003eCRITICAL WARNING:\u003c\/strong\u003e Disconnect all primary rack power and the DC 24V auxiliary external power source prior to physical installation or module extraction. Failure to fully de-energize circuits may lead to transient arc discharges, hardware failure of the internal bus transceivers, or erratic signals on adjacent MELSEC Q modules.\n\u003c\/div\u003e\n\n\u003col style=\"padding-left: 0; list-style-type: none; margin-bottom: 1.5rem;\"\u003e\n  \u003cli style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0; margin-right: 0.75rem;\"\u003e1\u003c\/span\u003e\n    \u003cspan style=\"color: #2d3748;\"\u003eAlign the bottom-fixing lug of the QJ71GP21S-SX module with the corresponding slot on the MELSEC Q base unit.\u003c\/span\u003e\n  \u003c\/li\u003e\n  \u003cli style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0; margin-right: 0.75rem;\"\u003e2\u003c\/span\u003e\n    \u003cspan style=\"color: #2d3748;\"\u003eSecurely push the top part of the module into the backplane connector until it clicks, and tighten the top mounting screw to the specified torque.\u003c\/span\u003e\n  \u003c\/li\u003e\n  \u003cli style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0; margin-right: 0.75rem;\"\u003e3\u003c\/span\u003e\n    \u003cspan style=\"color: #2d3748;\"\u003eConnect the external DC 24V auxiliary power lines to the dedicated auxiliary input terminal block, ensuring correct polarity.\u003c\/span\u003e\n  \u003c\/li\u003e\n  \u003cli style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0; margin-right: 0.75rem;\"\u003e4\u003c\/span\u003e\n    \u003cspan style=\"color: #2d3748;\"\u003eRemove protective dust caps and insert the Duplex LC multi-mode optical fiber connectors into Port 1 and Port 2.\u003c\/span\u003e\n  \u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Mitsubishi Electric","offers":[{"title":"Default Title","offer_id":53102125482347,"sku":"QJ71GP21S-SX","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/QJ71GP21S-SX-jf2bw1gxnjb.png?v=1776138011","url":"https:\/\/www.plcprotech.com\/ru\/products\/mitsubishi-electric-qj71gp21s-sx-melsec-q-series-cc-link-ie-controller-network-unit","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}