Product Series: Modicon M171/M172
Product Type: Programmable Controller
Application Type: HVAC (Heating, Ventilation, and Air Conditioning) Control
Variables: Programmable
Total inputs/outputs: 28
Number of Discrete Inputs: 8
Number of Discrete Outputs:
- 1 applicable, Relay Output SPDT (includes independent common points)
- 3 applicable, Relay Output SPST (includes the same common points)
- 2 applicable, Relay Output SPST (includes the same common points)
- 2 applicable, Relay Output SPST (includes independent common points)
Discrete Output Current:
- 3 A applicable, Relay SPDT
- 3 A applicable, Relay SPST
Number of Analog Inputs: 8 (configurable in pairs)
Outputs:
- 2 Voltage, Range: 0...10 V
- 2 Voltage/Current, Range: 4...20 mA or 0...10 V or PWM (2 kHz)

Number of Ports:
- 1 CAN Port - Screw Terminal
- 1 USB (Type - A) - Type - A Female USB
- 1 Mini - B USB - USB Device Port
- 2 RS485 - Screw Terminals (Modbus Serial or BACnet MS/TP)
- 1 Ethernet - RJ45 (Modbus TCP and BACnet IP with Web Server)
Input/Output Count:
- 8 Digital Input(s)
- 8 Analog Input(s)
- 4 Analog Output(s)
- 8 Digital Output(s)

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