The Waveshare RS485 TO POE ETH (B) is a versatile serial device server and Modbus gateway designed to bridge the gap between RS485 interfaces and Ethernet networks. It allows you to integrate industrial serial devices into a standard network infrastructure, supporting a wide range of network protocols including TCP, UDP, HTTP, and DHCP. You can configure the device easily through a web browser or a dedicated management library, with the flexibility to run TCP Client and TCP Server modes simultaneously. Built for demanding environments, this gateway features a white housing measuring 87 x 36 x 59 mm and includes a red clip for convenient DIN rail mounting. It ensures reliable operation with signal, power supply, and RS485 interface isolation, complemented by 2 KV surge protection on the RJ45 port. The hardware supports a baud rate from 300 bps to 115200 bps and is designed to function in extreme temperatures ranging from -40°C to 85°C. Powering the unit is flexible, as it supports PoE (IEEE 802.3af) for a single-cable installation or an external DC input from 6V to 36V via screw terminals. This makes it a practical choice for engineers and system integrators who need to monitor or control remote industrial equipment across a wide temperature range without needing separate power cabling at every node.