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Schneider Electric TM172PDG42SI

Schneider TM172PDG42SI Modicon M172 Programmable Controller,

MPNTM172PDG42SI
Obsolete

Schneider Electric Modicon M172 Programmable Controller, TM172PDG42SI, 42 I/O, Backlit LCD, Ethernet/RS485, 24 V AC/DC.

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MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

TM172PDG42SI key specifications
ParameterValue
Display typeBacklit LCD - 128 x 64 pixels
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 0.5 A solid state, isolated
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

TM172PDG42SI 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 A - USB type A female 1 USB type mini B - USB device port Mini-B 2 RS485 - screw terminal block Modbus serial link or BACnet MS/TP) 1 Ethernet - RJ45 Modbus TCP and BACnet IP with webserver)
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 solid state, isolated 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...131 °F (-20...55 °C) horizontal

Product details

The Schneider Electric TM172PDG42SI is a programmable controller in the Modicon M171/M172 range, explicitly designed for HVAC control applications as stated in its product-specific application field. It provides 42 mixed I/O — 12 digital inputs, 12 digital outputs (combination of relay SPDT/SPST and solid-state isolated), 12 analog inputs configurable by pair, and 6 analog outputs — making it a one-box solution for a medium-sized terminal controller.

I/O and fieldbus detail

Twelve digital inputs accept 24 V AC/DC, sink or source logic. The 12 digital outputs break into 2 relay SPDT with independent common, 3 relay SPST shared common, 5 relay SPST shared common, and 2 solid-state isolated SPST — relay contacts rated 3 A each, solid-state 0.5 A. Analog inputs handle voltage (0–5 V, 0–10 V), current (0–20 mA/4–20 mA), resistance (Pt1000, NTC 103AT-2, NTC NK103), and PTC probes, with per-pair configuration. Communication includes one Ethernet RJ45 port for Modbus TCP and BACnet IP with embedded web server, two RS485 screw terminals for Modbus serial link or BACnet MS/TP, and one USB mini-B device port for programming. A USB type-A host port is also present. This fieldbus mix covers both standard building automation protocols without additional gateways.

Environmental and mounting considerations

The controller is rated IP20 (protection against solid objects >12 mm, no water ingress), suitable for clean control panels. Operating ambient temperature is -4 to 149 °F (-20 to 65 °C), derated to -4 to 131 °F (-20 to 55 °C) when mounted horizontally per UL 60730-1. Storage range is -22 to 158 °F (-30 to 70 °C). Dimensions are 5.7 in (144 mm) wide × 4.3 in (110 mm) high × 2.4 in (60.5 mm) deep. It supports panel mounting with an accessory DIN-rail bracket — a common footprint for M172-series controllers.

Compliance and sourcing posture

The TM172PDG42SI carries UL, CSA, EN standards with material rating UL94 V0, and meets directives 2014/30/EU and 2014/35/EU.

Frequently asked questions

What are the key dimensions of the TM172PDG42SI?

The controller measures 5.7 in (144 mm) wide, 4.3 in (110 mm) high, and 2.4 in (60.5 mm) deep.

What compliance standards does the TM172PDG42SI meet?

It is listed under UL 60730-1, CSA E60730-1, EN 60730-1 and -2-9, and meets IEC 61000-4-x EMC immunity standards. Material rating is UL94 V-0. Directives 2014/30/EU (EMC) and 2014/35/EU (Low Voltage) are declared.

MPN
TM172PDG42SI