{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VW3AP3721","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"VW3AP3721","canonicalUrl":"https://aoctrl.com/schneider/VW3AP3721","factsUrl":"https://aoctrl.com/api/mcp/products/VW3AP3721","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Altivar, communication module VW3AP3721, MD-Link EtherNet/IP Modbus TCP, 10/100 Mbps, 2 x RJ45 connectors, daisy chain topology, embedded HTTP server.","salesMarkdown":"The Schneider Electric VW3AP3721 is a communication module for the Altivar drive family, adding MD-Link, EtherNet/IP, and Modbus TCP connectivity via two RJ45 ports at 10/100 Mbps. It uses a daisy chain topology, so drives connect in a line rather than a star — useful for saving switch ports on a machine cell but means a single cable fault can drop the whole chain. An embedded HTTP server serves drive diagnostics, energy monitoring, and configuration widgets through a browser — no extra software needed for basic setup. This card mounts inside the Altivar drive enclosure — it cannot be ordered alone; it ships only as part of a standard drive package. The two RJ45 connectors support auto-MDIX, so straight or crossover cables work without a hub. Protocol support includes EtherNet/IP adapter, Modbus TCP server, and ODVA AC Drive / CiA 402 profiles — covers most PLC integration scenarios. ## Communication services and diagnostics The module runs an SNMP agent for network monitoring, FTP for file transfer, SNTP for time sync, and RSTP for ring redundancy on Ethernet/IP networks. Four LEDs report Module Status, Network Status, and transmit/receive activity on each port — enough for a quick visual check without a laptop. Support for IPv6 addressing and half/full duplex auto-negotiation keeps it compatible with modern plant networks. Because it ships only with a standard enclosure, a replacement order needs the drive frame code or a complete drive assembly; the card alone is not a shelf spare.","metaTitle":"Schneider Electric VW3AP3721 Altivar Communication Module, M","metaDescription":"Schneider Electric VW3AP3721 Altivar communication card with MD-Link, EtherNet/IP, Modbus TCP. Daisy chain topology, embedded HTTP server, 10/100 Mbps. Active production. Sourced t","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Control Accessories"],"specifications":{"title":"VW3AP3721","Topology":"Daisy chain","Web server":"Embedded HTTP server","Bus profile":"CIP AC Drive CiA 402","description":"communication card MultiDrive Link, Altivar, 10/100Mbps, 2 x RJ45 connectors","Display type":"1 LED for MS (Module Status) 1 LED for NS (Network Status) 1 LED for TX/RX (Transmit/Receive port 1) 1 LED for TX/RX (Transmit/Receive port 2)","Web services":"Widgets (ID, control, data table, diagnostic, charts) Energy monitoring Customizable home page Save/restore drive configuration Ethernet setting and diagnostic Pump function setting and monitoring Upgrade drive firmware Drive monitor Drive setting and diagnostic","Exchange mode":"Half duplex and full duplex","lifecycle_stage":"mature","Condition of use":"Cannot be ordered alone, only possible in combination with a standard enclosure","Range of product":"Altivar","Transmission rate":"10/100 Mbps","Communication service":"SNMP agent for Ethernet IP Modbus TCP server for Ethernet IP/Modbus TCP Ethernet/IP adapter for Ethernet IP RSTP support for Ethernet IP FTP for Ethernet IP ODVA AC drive and CiA 402 profile for Ethernet IP/Modbus TCP Auto-MDIX for Ethernet IP/Modbus TCP 32 parameters IN - 32 parameters OUT implicit messaging for Ethernet IP/Modbus TCP FDR for Ethernet IP/Modbus TCP","Electrical connection":"2 connectors RJ45, Ethernet IP/Modbus TCP/MD-Link","Product or component type":"Communication module","Communication network type":"IPv6 (internet protocol)","Communication port protocol":"MD-Link EtherNet/IP Modbus TCP","Time synchronisation protocol":"SNTP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/892d83489ccc720772cdd5e12e7fa92b.pdf","sourceUrl":"https://www.se.com/th/en/product/VW3AP3721/communication-card-multidrive-link-altivar-10-100mbps-2-x-rj45-connectors/"},"ai":{"faq":[{"question":"What topology does VW3AP3721 support?","answer":"It uses a daisy chain topology, meaning drives connect in series on the same cable run rather than each going back to a switch."},{"question":"What web server is built into VW3AP3721?","answer":"An embedded HTTP server provides browser-based access to drive diagnostics, configuration, energy monitoring, and firmware upgrades."},{"question":"Can I order the VW3AP3721 as a standalone spare part?","answer":"No — it cannot be ordered alone; it is only available in combination with a standard Altivar enclosure."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/VW3AP3721","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/VW3AP3721 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}