Schneider Electric TM172PBG42R Logic Controller

Schneider Electric's Modicon M172 TM172PBG42R is a Performance Blind 42‑I/O PLC designed for DIN‑rail mounting in industrial control panels. It provides 42 digital I/O points and includes Ethernet for Modbus TCP communications, plus dual isolated RS‑485 serial ports for device networking. Powered from a 24 V AC/DC supply, the TM172PBG42R belongs to the M172 family’s compact, scalable line of programmable controllers and ships in a blind configuration (no front display), making it suitable for installations where external HMI or SCADA provides visualization. Typical applications include discrete automation tasks such as machine logic, sequencing, and building or process control where reliable I/O handling and Ethernet/Modbus connectivity are required. Key specifications: 42 I/O (digital), Ethernet with Modbus, 24 V input, DIN-rail mount, and two isolated RS‑485 interfaces, with Schneider EcoStruxure compatibility where applicable.