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Schneider Electric TM172OBM42R

Schneider TM172OBM42R Modicon M172, 42 I/O, HVAC

MPNTM172OBM42R
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Schneider Modicon M171/M172, Programmable Controller, TM172OBM42R, 42 I/O, 24 V AC/DC, without display.

$404.35 – $465.00Ref. price · indicative, final on quote
Schneider Electric TM172OBM42R datasheet (PDF)
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

TM172OBM42R key specifications
ParameterValue
Display typeWithout Display
Range of productModicon M171/M172
Analogue input typeimpedance 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
Product or component typeProgrammable controllers
Discrete input voltage24 V AC/DC
Supply voltage24 V +/- 10 % AC 20...38 V DC
Discrete input current2.5 mA
Discrete output current3 A relay SPDT 3 A relay SPST
Sensor power supply5 V DC 50 mA supplied by the controller 24 V DC 150 mA supplied by the controller
Power consumption in14 W 24 V AC/DC
IP degree of protectionIP20
Mounting supportPanel mounting with accessory DIN rail

All specifications

TM172OBM42R additional specifications
ParameterValue
Pollution degree2
Relative humidity5...95 % non-condensing
Operating altitude0...6561.68 ft (0...2000 m)
Depth2.4 in (60.5 mm)
Width5.7 in (144 mm)
Height4.3 in (110 mm)
StandardsCAN/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)
VariantProgrammable
CategoryUS1PC1222537
Directives2014/30/EU - electromagnetic compatibility 2014/35/EU - low voltage directive
Number of port1 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 clockBuilt-in clock, clock drift <= 30 s/month at -4...149 °F (-20...65 °C)
Input impedance10 kOhm
Local signalling1 LED (red) for programmable 1 LED (yellow) for programmable 1 LED (green) for programmable 1 LED (green) for power
Input (output number)12 analog input 6 analog output 12 digital input 12 digital output
Discrete input logicSink or source (positive/negative)
Measurement accuracyNTC 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 categoryII
Total inputs (outputs)42
Analogue input number12 configurable by pair
Discrete input number12
Analogue output number4 voltage 0...10 V 2 voltage/current 4...20 mA or 0...10 V or PWM (2 kHz)
Discrete output number2 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
Product specific applicationHVAC 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

Product details

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.

Frequently asked questions

What are the depth and width of TM172OBM42R?

Depth is 2.4 in (60.5 mm) and width is 5.7 in (144 mm).

What compliance documentation does Schneider provide for TM172OBM42R?

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.

MPN
TM172OBM42R