Industrial Isolated 4-Ch RS485 to Ethernet Serial Server [Modbus/MQTT/JSON]

An enterprise-grade 4-channel RS485 to Ethernet IoT gateway featuring dual Ethernet cascade expansion, 3000V isolation, and comprehensive Modbus RTU/TCP to MQTT/JSON edge computing capabilities for complex industrial automation architectures.

Part No. 4CH-RS485-ETH (V)
sku : IoT-SS105
INSTANT QUOTE

4-Ch RS485 to Ethernet Serial Server

Primary function

bi-directional transparent data transmission between RS485 and Ethernet

Installation Method

Support Rail-Mount and Wall-Mount, compact size, cost-effective

Power Supply

4CH-RS485-ETH (V) support DC 9~24V wide voltage range input

4CH-RS485-ETH (VI) support DC 18~36V wide voltage range input

Support cascading function

supports 10/100M dual ports design, supports switch function and can be cascaded

Modbus gateway support

Suitable for Modbus networking upgrade

Multi communication modes

supports TCP server / TCP client / UDP multicast / UDP mode, 4 channels, each channel supports in below functions are separately

Interface Diagram

Outline dimensions

Selection guide

ModelSerial Port TypePower Supply Voltage RangeDimensions
(L × W × H)

1CH-RS485-ETH

Single serial port serverScrew terminalDC 9~24V89*37*59mm

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

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

2CH-RS485-ETH

 Dual serial ports serverScrew terminalDC 9~24V37*83*89mm

2CH-RS485-ETH(V)

 Dual serial ports serverScrew terminalDC 9~24V150*105*41mm

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)

4 serial ports serverScrew terminalDC 9~24V150*105*41mm

4CH-RS485-ETH

4 serial ports serverScrew terminalDC 9~24V37*83*89mm

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)

8 serial ports serverScrew terminalDC 9~24V270*105*26mm

8CH-RS485-ETH

8 serial ports serverScrew terminalDC 9~24V37*83*89mm

8CH-RS232/485-ETH

8 serial ports serverScrew terminal + DC 5.5 power portDC 9~24V270*105*26mm
16CH-RS232/485/422-ETH16 serial ports serverAC 220V power portAC 220V480*180*44mm

32CH-RS232/485/422-ETH

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

Product model2CH-RS485-ETH (V)4CH-RS485-ETH (V)4CH-RS485-ETH (VI)8CH-RS485-ETH (V)8CH-RS485-ETH (VI)
Product TypeSerial server, Modbus Gateway, MQTT Gateway
Main FunctionBi-directional transparent data transmission between RS485 and Ethernet
InterfaceRS485 port x 2, Ethernet port x 1RS485 port x 4, Ethernet port x 2RS485 port x 4, Ethernet port x 2RS485 port x 8, Ethernet port x 2RS485 port x 8, Ethernet port x 2
Power supply9 ~ 24V DC screw terminal9 ~ 24V DC screw terminal18 ~ 36V DC screw terminal9 ~ 24V DC screw terminal18 ~ 36V DC screw terminal
Optocoupler isolationWith isolationWithout isolationWith isolationWithout isolationWith isolation
Communication
EthernetRJ45 port, 10M/100M, 2KV surge protection
Serial port2xRS4854xRS4858xRS485
Serial specification
Baudrate300~921600bps
Parity bitnone, odd, even, mark, space
Data bit5 ~ 9 bits
Flow controlXON/XOFF, NONE
Software
ProtocolETHERNET、IP、TCP、UDP、HTTP、ARP、ICMP、DHCP、DNS
ConfigurationVircom, WEB browser, device management library, Serial port AT command configuration
Communication method:TCP/IP direct communicate, Virtual serial
Operating modeTCP server, TCP client, UDP, UDP multicast
POWER REQUIREMENT  
Input voltage9～24V DC9～24V DC18～36V DC9～24V DC18～36V DC
Input current30mA@12V DC30mA@12V DC120mA@24V DC30mA@12V DC120mA@24V DC
Environment  
Operating temperature-40~85℃
Storage temperature-45~120℃
Humidity range5~95% relative humidity 
DimensionsL x W x H =8.8cm×6.2cm×3.3cmL x W x H =15cm×10.5cm×4.1m

4CH-RS485-ETH (V) is an RS485 IoT gateway specifically designed for industrial environments. It integrates multiple functions, including a serial server, Modbus gateway, MQTT gateway, and RS485 to JSON converter. It has 4 Channels RS485 interfaces and dual Ethernet interface.

4CH-RS485-ETH (VI)  with optocoupler isolation, isolation voltage 3000V.

It comes with mounting ears and rail buckles, supporting 3 installation methods. The devices can use the same IP address, and different serial ports are distinguished by ports; each serial port can also use different IP addresses. It can not only save IP resources through shared addresses, but also enable independent network communication through different IP address.

The devices supports transparent transmission and Modbus RTU to Modbus TCP function, has storage Modbus gateway characteristics, and also supports MQTT protocol. Supports MODBUS RTU, 645 protocol conversion to JSON and scheduled upload function through MQTT/HTTP POST.

When used as a Modbus gateway, it supports Modbus TCP to Modbus RTU, so that the host computer can use the Modbus TCP protocol to collect data from RS485 Modbus RTU devices. On the contrary, if the RS485 end is used as a master station, it can also be used. It supports more advanced Modbus gateway functions, including configurable Modus gateways, storage-type Modbus gateways, etc., which fully meet various configurations and usages of Modbus gateways. The multi-host function it supports allows multiple computer master stations to access an RS485 slave device at the same time.

When used as an MQTT gateway, the device can transparently upload serial port data to the MQTT server using the MQTT protocol. Supported servers include Baidu Cloud MQTT, Alibaba Cloud MQTT, China Mobile OneNet platform, etc. It supports parsing the collected Modbus RTU or non-standard serial port data into JSON format and encapsulating it in an MQTT data packet for uploading.

Supports uploading collected data in JSON format, automatic data collection, and supports Modbus RTU, 645 instrument version 97, 645 instrument version 07, and various non-standard RS485 protocols. Users can use Vircom to configure the uploaded data format and JSON keywords. When uploading, it can support MQTT protocol, HTTP POST protocol, HTTP GET protocol, transparent transmission protocol, and various non-standard network protocols.

[User Manual] Valtoris-4CH-RS485-ETH (V) User Manual

 
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