High-performance controller with 42 I/Os, Ethernet, and Modbus for HVAC control.
Product ModelTM172PBG42R
Product ID34245
Stock on Request
Last updated: 8/29/2026
Key Features
1
FeatureIdeal for HVAC control applications
2
FeatureFeatures 42 I/Os for extensive connectivity
3
FeatureSupports Ethernet and Modbus communication protocols
4
Compact dimensions144mm x 60.5mm x 110mm
5
FeatureWeighs only 0.385kg for easy installation
Technical Specifications
Detailed engineering parameters based on manufacturer documentation
Specifications may be subject to change without notice
Parameter
Value
Parameter
Value
Range of Product
Modicon M171/M172
Product or Component Type
Programmable controllers
Product Specific Application
HVAC and pumping solution
Variant
Programmable
Total inputs/outputs
42
Discrete input number
12
Discrete output number
5 relay outputs SPST with same common2 relay outputs SPST with independent common2 relay outputs SPDT with same common3 relay outputs SPST with independent common
Discrete output current
1 A relay SPDT3 A relay SPST
Analogue input number
12 configurable by pair
Analogue output number
4 voltage 0...10 V2 voltage/current 4...20 mA or 0...10 V or PWM (2 kHz)
Number of port
1 CAN port - screw terminal block1 USB type A - USB type A female1 USB type mini B - USB device port Mini-B2 RS485 - screw terminal block Modbus serial link or BACnet MS/TP)1 Ethernet - RJ45 Modbus TCP and BACnet IP with webserver)
Input/output number
12 analog input6 analog output12 digital input12 digital output
Discrete input logic
Sink or source (positive/negative)
Discrete input voltage
24 V AC/DC
Discrete input current
2.5 mA
input impedance
10 kOhm
Analogue input type
impedance 0...1500 hOhm impedance 0...300 daOhm direct inputNTC temperature probe - 50...110 °C 0.1 °C extended) voltage 0...10 VNTC temperature probe - 40...150 °C 0.1 °C current 0...20 mA/4...20 mAPTC temperature probe - 55...150 °C 0.1 °C voltage 0...5 V absolute or ratiometric)Pt 1000 temperature probe - 200...850 °C 0.1 °C
Sensor power supply
5 V DC 50 mA supplied by the controller24 V DC 150 mA supplied by the controller
[Us] rated supply voltage
24 V +/- 10 % AC20...38 V DC
Power consumption in W
15 W 24 V AC/DC
Realtime clock
Built-in clock at -4...140 °F (-20...60 °C)
Display type
Without Display
Overvoltage category
II
Local signalling
for programmable 1 LED (red) for programmable 1 LED (yellow) for programmable 1 LED (green) for power 1 LED (green)
Mounting Support
Panel mounting with accessoryDIN rail
Width
5.7 in (144 mm)
Height
4.3 in (110 mm)
Depth
2.4 in (60.5 mm)
Net Weight
0.849 lb(US) (0.385 kg)
Directives
2006/95/EC - low voltage directive86/188/EEC - physical agents (noise) directive
Standards
EN/IEC 60730UL94 (material V0)
Product Certifications
EACcURusCECSA
Ambient air temperature for operation
-4...140 °F (-20...60 °C) UL 60730-1-4...149 °F (-20...65 °C) with derating UL 60730-1
