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.
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.



Reviews
There are no reviews yet.