{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"QJ71GP21-SX","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"QJ71GP21-SX","canonicalUrl":"https://aoctrl.com/mitsubishi/QJ71GP21-SX","factsUrl":"https://aoctrl.com/api/mcp/products/QJ71GP21-SX","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi QJ71GP21-SX CC-Link IE Controller Network Unit, 1 Gbps optical fiber ring, 16 K points LW (128 K extended), 0.85 A at 5 VDC, Class 1 laser.","salesMarkdown":"## 1 Gbps deterministic ring for Q-series backplane The QJ71GP21-SX is a CC-Link IE Controller Network Unit that fits a Q-series PLC rack, giving the controller a 1 Gbps deterministic fiber-optic ring for motion and I/O coordination across up to 120 stations. It uses the token-ring method over a double-loop topology, which means a single fiber break self-heals and the network keeps running — the ring reverses direction and the link stays up. The physical layer is 1000 BASE-SX over multimode GI fiber with a double LC connector, giving a 550 m maximum inter-station distance and a total extension of 66 km with 120 units in the ring. ## Link data capacity and station count Each station can map up to 16 K points of LB (link relay) data in standard mode, expandable to 128 K points in extended mode — that is 256 K bytes of shared bit data per station when you need it. The per-station LX (link input) and LY (link output) each hold 8 K points (1 Kbyte), so the cyclic data exchange covers 32 I/O points of occupied intelligence on the backplane. Up to 239 networks are addressable, with 32 groups maximum per network, and the transient transmission payload tops out at 1920 bytes for parameter or diagnostic data outside the cyclic exchange. ## Panel integration and power budget The module draws 0.85 A from the 5 VDC backplane rail — a Q-series power supply needs to budget this alongside the CPU and other special-function modules in the rack. It is a Class 1 laser product per JIS C 6802 and IEC 60825-1, so no special eye-safety precautions are needed during installation or maintenance — the fiber output is inherently safe under normal use. Typical lead time runs 1–10 working days for stock-holding distributors; volume or project-level pricing is confirmed at RFQ time.","metaTitle":"Mitsubishi QJ71GP21-SX CC-Link IE Controller Network Unit","metaDescription":"Mitsubishi QJ71GP21-SX CC-Link IE Controller Network Unit. 1 Gbps optical fiber ring, 16K LW points (128K extended). Mature lifecycle, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC Communication Modules"],"specifications":{"LW":"16 K points (16384 points, 2 K bytes), extended mode: 128 K points (131072 points, 256 K bytes)","LX":"8K points (8192 points, 1 Kbyte)","LY":"8K points (8192 points, 1 Kbyte)","title":"QJ71GP21-SX","Weight":"0.18 Kg","Product No":"QJ71GP21-SX","description":"Mitsubishi CC-Link IE Controller Network Module","Product type":"CC-Link IE Controller Network Unit QJ71GP21-SX","Shipping Weight":"1.5 Kg","lifecycle_stage":"mature","Communication cable":"Optical fiber cable that meets 1000 BASE-SX standards: multimode optical fiber (GI)","Communication speed":"1 Gbps","Estimated Lead Time":"Usually ships in 1 - 10 working days.","Applicable connector":"Double LC type connector","Communication method":"Token ring method","Maximum number of groups":"32","Total extension distance":"66000 m (when 120 units are connected)","Transmission path format":"Double loop","Maximum number of networks":"239","External dimensions (HxWxD)":"9.8cm x 2.74cm x 9cm","Maximum Inter-Station Distance":"550 m","Number of occupied I / O points":"32 points (I / O assignment : 32 points of intelligence)","Transient transmission capacity":"Maximum 1920 bytes","Maximum link points per station LB":"16 K points (16384 points, 2 K bytes), extended mode: 32 K points (32768 points, 4 K bytes)","DC 5 V Internal current consumption":"0.85 A","Laser class (JIS C 6802, IEC 60825-1)":"Class 1 laser products","Maximum number of links per network LB":"32 K points (32768 points, 4 K bytes)","Maximum number of connected stations When the management station is the universal model QCPU":"120 (management station: 1 unit, normal station: 119 units) When the management station is a high performance model QCPU: 64 units (management station: 1 unit, normal station: 63 units)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$144.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/08d5690a9370f54eb657a539b45b4cb0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the link data capacity of the QJ71GP21-SX?","answer":"The LB (link relay) capacity is 16 K points (16384 points, 2 K bytes) in standard mode, expandable to 128 K points (131072 points, 256 K bytes) in extended mode. LX and LY each hold 8 K points (8192 points, 1 Kbyte)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/QJ71GP21-SX","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/mitsubishi/QJ71GP21-SX when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}