ETHUB18: 8-Channel RS485 Hub and Ethernet Converter
eletechsup ETHUB18 — 8-Channel RS485 Hub & Ethernet Converter Local Stock Turn one Ethernet line into 8 independent RS485 ports — Modbus TCP/RTU, MQTT & HTTP, with surge protection and DIN-rail mounting. 1 In → 8 Out DC 7–30V Wide Input TVS Surge Protection Modbus · MQTT · HTTP DIN-Rail Ready The eletechsup ETHUB18 is an 8-channel RS485 hub and Ethernet converter built for industrial and smart-building networks. It takes a single Ethernet interface and fans it out to eight independent RS485 ports, so you can connect and manage many serial devices over one network drop. It speaks the protocols real deployments rely on — UDP, TCP, Modbus TCP-to-RTU, MQTT and HTTP — all configured through a built-in web interface. Onboard TVS anti-surge protection shields the RS485 lines, while a wide DC 7–30V input (just 18–25 mA draw) makes it easy to power alongside existing equipment. It ships in a UM72 flame-retardant DIN-rail box, ready to snap onto DIN35 / C45 rail. Key Features ✓Converts 1 Ethernet interface into 8 independent RS485 ports — expand one line to eight devices. ✓Multi-protocol: UDP, TCP, Modbus TCP↔RTU, MQTT and HTTP work modes. ✓TVS anti-surge protection guards the RS485 lines against transients. ✓Wide input: DC 12V/24V nominal (7–30V range), low 18–25 mA draw. ✓Web-configurable baud rate up to 230400 bps and selectable parity (none / even / odd). ✓DIN-rail ready — includes a UM72 flame-retardant (V0) rail box for DIN35 / C45 rail. ✓Works with eletechsup RS485 devices (10IOA08, R4DCB08, R4D3B16, N4D3E16, N4AIA04). Specifications Function 1× Ethernet → 8× RS485 converter / hub Work Modes UDP, TCP, Modbus TCP↔RTU, MQTT, HTTP Working Voltage DC 12V/24V (range DC 7–30V) Working Current 18–25 mA Baud Rate Default 115200 bps; web-selectable 1200 / 2400 / 4800 / 9600 / 19200 / 38400 / 57600 / 115200 / 230400 bps Parity None / Even / Odd Surge Protection TVS anti-surge on RS485 lines Dimensions 99 × 87 × 44 mm (PCB only); with UM72 DIN-rail box (72 mm width, 96 mm backplane) Weight 62 g (PCB only) / 140 g (with DIN-rail box) Mounting DIN35 / C45 rail — UM72 box, green, flame-retardant V0 Applications PLC / SCADA automation Smart home & building automation Security monitoring Identification systems IP cameras LED lamp drivers Automatic curtain / motor control What's in the Box 1× ETHUB18 module (1 Ethernet → 8 RS485) with UM72 DIN-rail box