{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TM172ODM42R","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"TM172ODM42R","canonicalUrl":"https://aoctrl.com/schneider/TM172ODM42R","factsUrl":"https://aoctrl.com/api/mcp/products/TM172ODM42R","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Modicon M172, TM172ODM42R, programmable HVAC controller, 42 I/O, backlit LCD 128x64, 24 V AC/DC.","salesMarkdown":"The TM172ODM42R is a Modicon M172 programmable controller built specifically for HVAC control — that's its intended application, not a general-purpose PLC. It carries 42 I/O points on board: 12 digital inputs (24 V AC/DC sink/source), 12 relay outputs rated 3 A per channel, 12 analog inputs configurable by pair, and 6 analog outputs (4 voltage, 2 selectable as voltage/current/PWM). The analog inputs accept NTC 103AT-2 and NK103 thermistors, PTC probes, Pt1000 RTDs, plus 0–10 V, 0–5 V, and 4–20 mA current loops. That covers most HVAC sensors — duct temperature, return air, coil temperature, humidity with a 0–10 V transmitter — without external signal conditioners. ## I/O configuration and integration Twelve digital inputs are grouped four per common, sink or source wiring. The twelve relay outputs are split into groups: two SPDT with independent common, three and five SPST sharing a common, and two SPST with independent common — you get both isolated and common-return channels without adding interposing relays. The analog outputs include four dedicated 0–10 V channels and two that can be jumpered for 0–10 V, 4–20 mA, or PWM at 2 kHz. That PWM output is handy for triac-driven actuators or modulating burner controls. On the communications side: one CAN port on a screw terminal block, two RS-485 ports for Modbus serial or BACnet MS/TP, and a USB mini-B for programming and data logging. The real-time clock drifts under 30 seconds per month at -20 to 65 °C, so schedule-based time-of-day sequences stay accurate through the seasons. ## Physical mounting and environment The controller measures 5.7 x 4.3 x 2.4 inches (144 x 110 x 60.5 mm) and mounts on a DIN rail using the optional clip, or directly to a panel. IP20 front, so install it inside an enclosure. Operates from 24 V AC/DC, draws 14 W, and handles -20 to 65 °C ambient (derated to 60 °C for UL 60730-1 horizontal mount). Altitude rating: 0–2000 m, pollution degree 2, overvoltage category II. Material flammability meets UL94 V0.","metaTitle":"Schneider TM172ODM42R Modicon M172 HVAC Controller, 42 I/O","metaDescription":"Schneider TM172ODM42R Modicon M172 programmable controller for HVAC. 42 I/O (12 DI, 12 DO relay, 12 AI, 6 AO), backlit LCD, CAN/RS485, real-time clock. Active production, RFQ sourc","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":[],"specifications":{"Depth":"2.4 in (60.5 mm)","Width":"5.7 in (144 mm)","Height":"4.3 in (110 mm)","Variant":"Programmable","Category":"US1PC1222537","Standards":"CAN/CSA-E60730-1 CSA E60730-2-9 EN 60068-2-27 EN 60068-2-6 Fc EN 60730-1 EN 60730-2-9 UL 60730-1 UL 60730-2-9 IEC 61000-4-2 IEC 61000-4-3 IEC 61000-4-4 IEC 61000-4-5 IEC 61000-4-6 IEC 61000-4-11 UL94 (material V0)","Directives":"2014/30/EU - electromagnetic compatibility 2014/35/EU - low voltage directive","Display type":"Backlit LCD - 128 x 64 pixels","Number of port":"1 CAN port - screw terminal block 1 USB type mini B - USB device port Mini-B 2 RS485 - screw terminal block Modbus serial link or BACnet MS/TP)","Realtime clock":"Built-in clock, clock drift <= 30 s/month at -4...149 °F (-20...65 °C)","Input impedance":"10 kOhm","lifecycle_stage":"current","Local signalling":"1 LED (red) for programmable 1 LED (yellow) for programmable 1 LED (green) for programmable 1 LED (green) for power","Mounting Support":"Panel mounting with accessory DIN rail","Pollution degree":"2","Range of Product":"Modicon M171/M172","Relative humidity":"5...95 % non-condensing","Operating altitude":"0...6561.68 ft (0...2000 m)","Analogue input type":"impedance 0...1500 hOhm 1 hOhm 10 kOhm impedance 0...300 daOhm 1 daOhm 2 kOhm NTC 103AT-2 Beta 3435 temperature probe - 50...110 °C 0.1 °C 10 kOhm voltage 0...10 V 1 digit > 10 kOhm NTC NK103 Beta 3977 temperature probe - 40...137 °C 0.1 °C 10 kOhm extended) current 0...20 mA/4...20 mA 1 digit < 150 Ohm PTC temperature probe - 55...150 °C 0.1 °C 2 kOhm voltage 0...5 V 1 digit > 20 kOhm absolute or ratiometric) Pt 1000 temperature probe - 200...850 °C 0.1 °C 2 kOhm direct input > 10 kOhm","Input/output number":"12 analog input 6 analog output 12 digital input 12 digital output","Sensor power supply":"5 V DC 50 mA supplied by the controller 24 V DC 150 mA supplied by the controller","Discrete input logic":"Sink or source (positive/negative)","Measurement accuracy":"NTC NK103 Beta 3977 - 40...+110 °C +/- 1 °C NTC NK103 Beta 3977 110...137 °C +/- 1.9 °C NTC 103AT-2 Beta 3435 - 50...110 °C +/- 1 °C PTC - 55...155 °C +/- 1.1 °C Pt 1000 - 200...-100 °C +/- 10 °C Pt 1000 - 100...-50 °C +/- 2.5 °C Pt 1000 - 50...100 °C +/- 1.5 °C Pt 1000 100...400 °C +/- 2.4 °C Pt 1000 400...850 °C +/- 10 °C 0...20 mA 0...4 mA +/- 2 % of full scale +/- 1 digit 0...20 mA 4...20 mA +/- 1 % of full scale +/- 1 digit 4...20 mA +/- 1 % of full scale +/- 1 digit 0...10 V +/- 1 % of full scale +/- 1 digit 0...5 V +/- 1 % of full scale +/- 1 digit HOhm 0...1500 hOhm +/- 8.5 hOhm DaOhm 0...300 daOhm +/- 2.5 daOhm","Overvoltage category":"II","Total inputs/outputs":"42","Analogue input number":"12 configurable by pair","Discrete input number":"12","Nbr. of units in pkg.":"1","Analogue output number":"4 voltage 0...10 V 2 voltage/current 4...20 mA or 0...10 V or PWM (2 kHz)","Discrete input current":"2.5 mA","Discrete input voltage":"24 V AC/DC","Discrete output number":"2 relay outputs SPDT with independent common 3 relay outputs SPST with same common 5 relay outputs SPST with same common 2 relay outputs SPST with independent common","Power consumption in W":"14 W 24 V AC/DC","Discrete output current":"3 A relay SPDT 3 A relay SPST","IP degree of protection":"IP20","Product or Component Type":"Programmable controllers","[Us] rated supply voltage":"24 V +/- 10 % AC 20...38 V DC","Product Specific Application":"HVAC control","Ambient Air Temperature for Storage":"-22...158 °F (-30...70 °C)","Ambient air temperature for operation":"-4...149 °F (-20...65 °C) UL 60730-1 -4...140 °F (-20...60 °C) horizontal UL 60730-1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$461.44 – $530.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a2fb4b736655f7e8774d2cb12d1c9ca5.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/TM172ODM42R/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions for panel cutout?","answer":"The controller is 5.7 in (144 mm) wide, 4.3 in (110 mm) tall, and 2.4 in (60.5 mm) deep. It can be panel-mounted or DIN-rail mounted with the optional clip."},{"question":"What compliance certifications does the TM172ODM42R hold?","answer":"It carries UL 60730-1, CSA E60730-1, EN 60730-1, plus the EU EMC and Low Voltage Directives. Material flammability is UL94 V0. Full standards list includes IEC 61000-4-x immunity tests."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/TM172ODM42R","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/TM172ODM42R 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}}