1 Port RS232/485/422 to Ethernet Converter | TCP/IP to serial

An industrial-grade RS232/RS485/RS422 to Ethernet serial device server and Modbus/MQTT edge computing gateway. Featuring a 3-in-1 selectable serial interface, 2KV surge protection, and wide 9-24V power input (Terminal Block or 5.5mm DC)

Part No. 1CH-RS232/485/422-ETH (V)
sku : IoT-SS101
INSTANT QUOTE
serial to ethernet converter
serial to ethernet converter

Bi-Directional Transparent Data Transmission

Seamlessly bridge your legacy serial devices to local area networks. It ensures zero-data-loss transmission between RS232/485/422 and Ethernet without altering your payload.

1CH-RS232/485/422-ETH (V) 3-in-1 Serial to Ethernet Converter Overview

Modbus RTU to TCP Gateway

Upgrades legacy PLCs and meters effortlessly. It acts as an autonomous gateway converting Modbus TCP network queries into Modbus RTU serial commands.

Modbus RTU to TCP gateway protocol conversion

Multiple Communication Modes

Highly adaptable to various network topologies. Supports TCP Server, TCP Client, UDP mode, and UDP multicast, accommodating diverse SCADA software requirements.

Multiple communication modes TCP Server Client UDP

Multiple communication modes TCP Server Client UDP

MQTT JSON To Modbus Flexible Conversion

Multi-Host Polling & Virtual Serial Port

Features advanced arbitration to prevent RS485 bus collisions when multiple hosts poll simultaneously. Fully compatible with VirCom software for virtual COM port mapping.


Multi-host polling and VirCom Virtual Serial Port

Interface Diagram

1CH-RS232/485/422-ETH (V) Hardware Port and LED Definitions
Power Supply and Serial Port Wiring Diagram

Outline dimensions

Physical CAD mechanical dimensions and desktop mounting holes

Selection guide

ModelSerial Port TypePower Supply Voltage RangeDimensions
(L × W × H)
1CH-RS485-ETH

1CH-RS485-ETH

Single serial port serverScrew terminalDC 9~24V89*37*59mm
1CH-RS232/485/422-ETH (V)

1CH-RS232/485/422-ETH (V)

RS232/485/422 choose one, single serial port serverScrew terminal + DC 5.5 power portDC 9~24V94*65*25mm
1CH-RS232/485/422-ETH

1CH-RS232/485/422-ETH

RS232/485/422 choose one, single serial port serverScrew terminal + DC 5.5 power portDC 9~24V94*65*25mm
2CH-RS485-ETH

2CH-RS485-ETH

 Dual serial ports serverScrew terminalDC 9~24V37*83*89mm
2CH-RS485-ETH(V)

2CH-RS485-ETH(V)

 Dual serial ports serverScrew terminalDC 9~24V150*105*41mm
2CH-RS232/485/422-ETH

2CH-RS232/485/422-ETH

RS232/485/422 choose one, Dual serial ports serverScrew terminal + DC 5.5 power portDC 9~24V94*65*25mm
4CH-RS485-ETH (V)

4CH-RS485-ETH (V)

4 serial ports serverScrew terminalDC 9~24V150*105*41mm
4CH-RS485-ETH

4CH-RS485-ETH

4 serial ports serverScrew terminalDC 9~24V37*83*89mm
4CH-RS232/485/422-ETH

4CH-RS232/485/422-ETH

RS232/485/422 choose one, 4 serial ports serverScrew terminal + DC 5.5 power portDC 9~24V92*197*25mm
8CH-RS485-ETH (V)

8CH-RS485-ETH (V)

8 serial ports serverScrew terminalDC 9~24V270*105*26mm
8CH-RS485-ETH

8CH-RS485-ETH

8 serial ports serverScrew terminalDC 9~24V37*83*89mm
8CH-RS232/485-ETH

8CH-RS232/485-ETH

8 serial ports serverScrew terminal + DC 5.5 power portDC 9~24V270*105*26mm
16CH-RS232/485/422-ETH

16CH-RS232/485/422-ETH

16 serial ports serverAC 220V power portAC 220V480*180*44mm
32CH-RS232/485/422-ETH

32CH-RS232/485/422-ETH

32 serial ports serverAC 220V power portAC 220V480*180*44mm

Hardware & Interfaces
Ethernet Port1× 10/100M RJ45 Port, 2KV Surge Protection
Serial Interface1× RS232 (DB9), 1× RS485 (Terminal), 1× RS422 (Terminal) – Choose One
Power InputDC 9~24V (Screw Terminal or DC 5.5mm port)
Serial Specifications
Baud Rate300 ~ 115200 bps
Data & Parity BitsData: 5 ~ 9 bits | Parity: none, odd, even, mark, space
Software & Network
ProtocolsTCP, UDP, HTTP, ARP, ICMP, DHCP, DNS, Modbus, MQTT
Operating ModesTCP Server, TCP Client, UDP, Real Com Driver (Virtual Serial)
ConfigurationWEB Browser, VirCom Utility, Device management library
Environment
Operating Temp.-40°C ~ +85°C
Humidity5~95% relative humidity (non-condensing)
Versatile 3-in-1 IoT Gateway

The 1CH-RS232/485/422-ETH (V) is an IoT gateway with a wide range of functions developed for complex industrial environment. It is a small device that brings together the features of a standard serial server, an intelligent Modbus gateway, a MQTT gateway and a raw-to-JSON edge converter.

It features three different serial interfaces (RS232, RS485 and RS422) allowing the user to choose the precise physical layer required for their legacy equipment and a robust 10/100M Ethernet interface. It has much higher cost effectiveness and deployment flexibility than ordinary single port serial servers.

Hardware Design & Installation

It is built for rugged enterprise use, and can easily be screw-hole mounted on desktop or panel. Power delivery is very flexible, with supply via an industrial terminal block or a standard 5.5mm round-hole DC adapter. Wide voltage input range 9~24V DC ensures stable operation even in industrial power fluctuations.

Technical FAQ

Can I connect RS232, RS485, and RS422 devices to this server at the same time?
No. This model is a “3-in-1 selectable” interface. While it physical provides ports for RS232, RS485, and RS422, they share the same internal UART channel. You can only wire and use one type of serial connection at any given time. If you need to connect multiple different devices simultaneously, please look at our multi-port series (e.g., 2CH or 4CH servers).
What are my options for powering this device in a control cabinet?
The (V) version provides two flexible power input methods, wired to the screw terminal block for a standard industrial DC 9~24V power supply or via a conventional 5.5mm DC barrel jack adapter. This makes it suitable for integration into DIN-rail panels and for use in desktop laboratories.
Does it support Modbus TCP to Modbus RTU routing?
Yes. By enabling the Modbus Gateway function via the Web GUI or VirCom utility, it automatically translates Modbus TCP packets from your network host (SCADA/HMI) into Modbus RTU format for your connected serial slaves, and vice versa.
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