{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TM171VEVD4","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"TM171VEVD4","canonicalUrl":"https://aoctrl.com/schneider/TM171VEVD4","factsUrl":"https://aoctrl.com/api/mcp/products/TM171VEVD4","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Modicon M171 EEV driver, autonomous & hardwired, order code TM171VEVD4, 8 I/O (4 analog, 2 digital input, 2 digital output), 1 Modbus RS485 port, 24 V DC, DIN rail, IP20, CE marked.","salesMarkdown":"## Overview The TM171VEVD4 is a Schneider Modicon M171 EEV driver, order code TM171VEVD4, designed for autonomous and hardwired control of electronic expansion valves. The unit provides 8 I/O total: 4 analog inputs (2 NTC, 2 Pt1000, configurable for 4...20 mA, 0...5 V, or 0...10 V), 2 digital inputs (sink or source), and 2 digital outputs (1 open collector, 1 SPST relay). A single Modbus RS485 serial port is included. The TM171VEVD4 carries CE marking and is classified as a controller within the Modicon M171 range. Compared to the TM171VEVA2 (1 analog input, 1 digital output, 2 I/O total), the TM171VEVD4 offers 4 analog inputs, 2 digital inputs, and 2 digital outputs — 8 I/O total. The additional analog channels support both NTC and Pt1000 probes, and the second output is a SPST relay. Choose the TM171VEVD4 when the application requires more sensor inputs and a relay output for valve or alarm control. ## Lifecycle The TM171VEVD4 is discontinued by Schneider, effective 2021-02-12. No direct successor is listed in the Modicon M171 range. For new designs or replacements, evaluate current-production controllers in the Modicon M171/M172/M173 family that offer equivalent I/O and EEV drive capability.","metaTitle":"Schneider TM171VEVD4 Modicon M171 EEV Driver, 24 V DC, IP20","metaDescription":"Schneider Modicon M171 TM171VEVD4 EEV driver, autonomous & hardwired, 8 I/O (4 analog, 2 digital input, 2 digital output), 24 V DC, DIN rail, IP20, CE marked. Discontinued.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":[],"specifications":{"Depth":"2.4 in (61.6 mm)","Width":"2.8 in (70.2 mm)","Height":"3.4 in (87 mm)","Marking":"CE","Category":"US1PC1222537","Display Type":"Without Display","Contacts usage":"Volt-free contacts","Number of port":"1 Modbus serial link - RS485","lifecycle_stage":"current","Mounting Support":"DIN rail","Range of Product":"Modicon M171","Input/output number":"8 total) 4 analog input 2 digital input 2 digital output","Sensor power supply":"5 V DC 12 V DC","Discrete input logic":"Sink or source (positive/negative)","Analogue input number":"2 analog input NTC 2 analog input Pt 1000 4...20 mA or 0...5 V or 0...10 V","Discrete input number":"2","Nbr. of units in pkg.":"1","Discrete output number":"1 open collector 1 SPST","IP degree of protection":"IP20","Product or Component Type":"Controller","[Us] rated supply voltage":"24 V +/- 10 % AC/DC","Ambient air temperature for operation":"23...122 °F (-5...50 °C)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8b290a739ba7f7a09391cb8ffb6252e7.pdf","sourceUrl":"https://www.se.com/ie/en/product/TM171VEVD4/eev-driver-autonomous-hardwired/","alternativesUrl":"https://aoctrl.com/api/mcp/products/TM171VEVD4/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/TM171VEVD4","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/TM171VEVD4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:21:01.794Z","lastPublished":"2026-09-02T08:21:01.794Z","indexable":true}}