





Interface Diagram


Outline dimensions

Selection guide
An industrial-grade RS232/485/422 to Ethernet serial device server and edge computing gateway, featuring advanced storage Modbus TCP/RTU conversion, 2KV surge protection, and seamless MQTT/JSON cloud integration for robust SCADA automation and large-scale IoT networks.









| Product model | 1CH-RS485-ETH | 1CH-RS232/485/422-ETH | 1CH-RS232/485/422-ETH (V) |
| Product Type | Serial server, Modbus Gateway, MQTT Gateway | ||
| Main Function | Bi-directional transparent data transmission between RS485 and Ethernet | Bi-directional transparent data transmission between RS232/485/422 and Ethernet | |
| Interface | RS485 port x 1, Ethernet port x 1 | RS232 port x 1, RS485 port x 1, RS422 port x 1, Ethernet port x 1 | |
| Power supply | 9 ~ 24V DC screw terminal | 485/422: 9 ~ 24V DC screw terminal, 232:9 ~ 24V DC DB9 | |
| Communication | |||
| Ethernet | 9 ~ 24V DC screw terminal | 485/422: 9 ~ 24V DC screw terminal, 232:9 ~ 24V DC DB9 | |
| Serial port | RS485 | RS485/232/422 | |
| Serial specification | |||
| Baud rate | 300 ~ 115200 bps | ||
| Parity bit | none, odd, even, mark, space | ||
| Data bit | 5 ~ 9 bits | ||
| Flow control | N/A | ||
| Software | |||
| Protocol | ETHERNET, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS | ||
| Configuration | VirCom, WEB browser, device management library | ||
| Communication method: | TCP/IP direct communicate, Virtual serial | ||
| Operating mode | TCP server, TCP client, UDP, Real Com Driver | ||
| Environment | |||
| Operating temperature | -40~85℃ | ||
| Storage temperature | -45~120℃ | ||
| Humidity range | 5~95% relative humidity | ||
1CH-RS232/485/422-ETH is an RS232/485/422 IoT gateway specifically
designed for industrial environments. It integrates multiple functions, including a serial server, Modbus gateway, MQTT gateway, and RS232/485/422 to JSON converter. It features three interfaces (RS232/485/422, selectable) and one Ethernet interface. It supports desktop screw-hole mounting for easy installation. Power is supplied via a terminal block or a 5.5 mm round-hole adapter, with a wide voltage input of 9–24 V. Compared to ordinary serial servers, it offers higher cost-effectiveness