The Schneider Electric TM171AETH is a plug-in Ethernet communication module for the Modicon M171 controller line. It mounts onto the EVD/EVC base board and adds Modbus TCP, BACnet IP, HTTP, and SMTP connectivity to the system. This is the part you add when the M171 needs to talk over IP — whether for SCADA, BMS integration, or remote web access. The module uses a standard RJ45 100BASE-TX interface and supports multiple protocols on that single port. That means the same hardware handles building automation (BACnet), industrial control (Modbus TCP), and web services (HTTP/SMTP) without a protocol converter.
Supply comes from the EVD/EVC base board — the module has no external power input. Confirm your base board has the mating header and that the system power budget can handle the module's draw (typically negligible for the base). Rated for operation from -10 to 55°C and storage from -20 to 85°C, with 10-90% humidity non-condensing. This covers most indoor cabinet environments; no special cooling required for standard shop-floor panels. IP20 protection means it is intended for use inside an enclosed cabinet. Not rated for washdown or dust-heavy areas without a higher-rated enclosure around it.