{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TM172OBM42R","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"TM172OBM42R","canonicalUrl":"https://aoctrl.com/schneider/TM172OBM42R","factsUrl":"https://aoctrl.com/api/mcp/products/TM172OBM42R","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Modicon M171/M172, Programmable Controller, TM172OBM42R, 42 I/O, 24 V AC/DC, without display.","salesMarkdown":"The Schneider TM172OBM42R is a Modicon M172 programmable controller rated for 24 V AC/DC supply (±10% AC or 20–38 V DC), with 42 total I/O: 12 digital inputs (sink/source, 24 V AC/DC), 12 digital outputs (relay, 3 A), 12 analog inputs configurable by pair (0–10 V, 0/4–20 mA, Pt1000, NTC), and 6 analog outputs (4 voltage 0–10 V + 2 selectable voltage/current/PWM). This I/O mix targets HVAC and building automation panels where you need both discrete control of contactors or valves and analog loop monitoring of temperature or pressure sensors. Dual RS485 ports support Modbus or BACnet; one CAN port and a USB mini-B are also present. No onboard display. The built-in RTC drifts ≤30 s/month over the -20 to 65 °C range. Complies with UL, CSA, EN, and IEC safety and EMC standards. CE marked under 2014/35/EU and 2014/30/EU. Pollution degree 2, overvoltage category II. Material rating UL94 V-0. Panel-mount via DIN rail; dimensions 110 mm high × 144 mm wide × 60.5 mm deep. IP20 enclosure requires a cabinet; terminal blocks are fixed screw-type. Power consumption 14 W at 24 V AC/DC; account for heat dissipation in sealed enclosures. Sensor supply: 5 V DC at 50 mA and 24 V DC at 150 mA available from the controller – adequate for a handful of 2-wire transmitters or Hall-effect sensors. Discrete inputs draw 2.5 mA each, compatible with standard 3-wire proximity switches as well as dry contacts. Wiring the RS485 bus: twisted-pair cable, terminate at last device, ensure common reference. Dual ports allow separate Modbus and BACnet networks; CAN port uses screw terminal blocks for all field connections.","metaTitle":"Schneider TM172OBM42R Modicon M172, 42 I/O, HVAC","metaDescription":"Current-production HVAC controller with 42 I/O (12DI/12DO/12AI/6AO), 24 V AC/DC, relay outputs, RS485/Modbus, USB. Sourced to order; RFQ for lead time and pricing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","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":"Without Display","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":"$404.35 – $465.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7f84e727ab5b065b97cca1436cdf4bf0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/TM172OBM42R/alternatives.json"},"ai":{"faq":[{"question":"What are the depth and width of TM172OBM42R?","answer":"Depth is 2.4 in (60.5 mm) and width is 5.7 in (144 mm)."},{"question":"What compliance documentation does Schneider provide for TM172OBM42R?","answer":"The controller complies with UL 60730-1, CSA E60730-1, EN 60730-1, EN 60068-2-27/2-6, IEC 61000-4-x EMC standards, and carries CE marking under low voltage and EMC directives (2014/35/EU, 2014/30/EU). Material rating is UL94 V-0."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/TM172OBM42R","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/TM172OBM42R 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}}