The TM172PDG28RI is a programmable controller from the Modicon M172 performance line, specifically engineered for HVAC control. It provides a total of 28 inputs and outputs, including 8 discrete inputs, 8 configurable analog inputs, 8 relay outputs, and 4 analog outputs, two of which support PWM generation up to 2 kHz. This controller offers extensive connectivity with ports for Ethernet, CAN, two RS485 serial links, and USB, supporting protocols like Modbus TCP, BACnet IP, and BACnet MS/TP. It operates on a 24V AC/DC supply and features a built-in 128x64 pixel backlit LCD for local monitoring. Its versatile I/O and communication capabilities make it a robust solution for managing complex heating, ventilation, and air conditioning systems.