The RS-485 to RJ45 Industrial Serial Server (C) provides transparent RS-485 to Ethernet transmission with support for Modbus, MQTT, JSON, and more. It features isolated RS-485 and power, 6–36V screw terminal input, surge-protected Ethernet, and compact rail-mount housing.

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This is an RS-485 device data acquisitor / IoT gateway from Waveshare, designed for industrial environments, offering bi-directional transparent data transmission between RS-485 and Ethernet. It combines multiple functions in one, including serial server, Modbus gateway support, MQTT gateway support, RS-485 to JSON and more.

The module features an RS-485 and an Ethernet port, and uses screw terminals for power input. It has a rail-mount case design, is small in size and easy to install.

This is the 'C' version, which accepts a 6-36V power supply and comes with power isolation and signal isolation protection. Power supply not included.

Features

• Serial server, Modbus Gateway, MQTT Gateway
• Bi-directional transparent data transmission between RS-485 and Ethernet
• RS485 x1, Ethernet port x1
• Screw terminal DC 6~36V power input
• Power isolation and signal isolation protection
• Common network port with 10/100M self-adaptive RJ45 interface
• 2 KV surge protection on Ethernet
• Isolated RS-485 serial port
• Protocols: ETHERNET, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS
• Configuration via host, web browser, or device management functions library
• Communication methods: TCP/IP direct, VCOM
• Operating modes:
  • TCP server
  • TCP client (can coexist with TCP server)
  • UDP mode
  • UDP multicast

Specifications

Product Type	Serial server, Modbus Gateway, MQTT Gateway
Basic Function	Bi-directional transparent data transmission between RS-485 and Ethernet
Communication interface	RS485 port x 1, Ethernet port x 1
Power supply	6~36V DC screw terminal
Isolation Protection	Power isolation, Signal isolation
Ethernet	common network port
	10 / 100M auto-negotiation RJ45 connector, 2 KV surge protection
Serial port	Isolated RS485
Baud rate	300 ~ 115200 bps
Parity bit	none, odd, even, mark, space
Data bit	5 ~ 9 bits
Flow control	N/A
Protocol	ETHERNET, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS
Configuration	host, web browser, device management functions library
Communication method	TCP/IP direct communication, VCOM
Operating mode	TCP server, TCP client (coexisting with TCP server), UDP, UDP multicast
Operating temperature	-40℃ ~ 85℃
Humidity range	5% ~ 95% relative humidity
Dimensions	L × W × H: 87 × 36 × 59 mm

Resources

• Product wiki

Package Contents

• 1x RS-485 to RJ45 Industrial Serial Server - Common Ethernet Port (C)

Power supply not included.