8-Port RS485 to Ethernet Gateway | Dual LAN Modbus Server

8-Port RS485 to Ethernet Gateway for high density industrial automation architectures. It has two Ethernet ports for daisy-chain cascading and optional 3000V optical isolation, providing strong Modbus RTU/TCP to MQTT/JSON edge computing for complex SCADA networks.

Part No. 8CH-RS485-ETH (V)

sku : IoT-SS108

INSTANT QUOTE

8-Port RS485 to Ethernet Gateway Overview

Primary function

Bi-directional transparent data transmission between 8 Channels RS485 and Ethernet

Bi-directional transparent data transmission for 8 Channels

8-Port RS485 to Ethernet network routing architecture

Installation Method

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

Rail-Mount and Wall-Mount Installation for 8-Port Serial Server

Power Supply

8CH-RS485-ETH (V) support DC 9~24V wide voltage range input

8CH-RS485-ETH (VI) support DC 18~36V wide voltage range input

Industrial wide voltage power supply terminal

Compact size and robust enclosure design

Support cascading function

supports 10/100M dual ports design

supports switch function and can be cascaded

Dual Ethernet ports switch function for cascading

Modbus gateway support

Suitable for Modbus networking upgrade

Modbus RTU to Modbus TCP networking upgrade

Multi communication modes

supports TCP server / TCP client / UDP multicast / UDP mode

8 channels, each channel supports in below functions are separately

Multi communication modes for 8 independent channels

TCP server TCP client and UDP mode configuration

Independent 8-channel Modbus TCP connections

Multi communication capabilities interface

Interface Diagram

8CH-RS485-ETH Hardware Interface and LED Diagram

Power Supply and Serial Port Wiring Pinouts

Outline dimensions

Selection guide

Model	Serial Port Type	Power Supply	Voltage Range	Dimensions (L × W × H)
1CH-RS485-ETH	Single serial port server	Screw terminal	DC 9~24V	893759mm
1CH-RS232/485/422-ETH (V)	RS232/485/422 choose one, single serial port server	Screw terminal + DC 5.5 power port	DC 9~24V	946525mm
1CH-RS232/485/422-ETH	RS232/485/422 choose one, single serial port server	Screw terminal + DC 5.5 power port	DC 9~24V	946525mm
2CH-RS485-ETH	Dual serial ports server	Screw terminal	DC 9~24V	378389mm
2CH-RS485-ETH(V)	Dual serial ports server	Screw terminal	DC 9~24V	15010541mm
2CH-RS232/485/422-ETH	RS232/485/422 choose one, Dual serial ports server	Screw terminal + DC 5.5 power port	DC 9~24V	946525mm
4CH-RS485-ETH (V)	4 serial ports server	Screw terminal	DC 9~24V	15010541mm
4CH-RS485-ETH	4 serial ports server	Screw terminal	DC 9~24V	378389mm
4CH-RS232/485/422-ETH	RS232/485/422 choose one, 4 serial ports server	Screw terminal + DC 5.5 power port	DC 9~24V	9219725mm
8CH-RS485-ETH (V)	8 serial ports server	Screw terminal	DC 9~24V	27010526mm
8CH-RS485-ETH	8 serial ports server	Screw terminal	DC 9~24V	378389mm
8CH-RS232/485-ETH	8 serial ports server	Screw terminal + DC 5.5 power port	DC 9~24V	27010526mm
16CH-RS232/485/422-ETH	16 serial ports server	AC 220V power port	AC 220V	48018044mm
32CH-RS232/485/422-ETH	32 serial ports server	AC 220V power port	AC 220V	48018044mm

Hardware & Interfaces	8CH-RS485-ETH (V)	8CH-RS485-ETH (VI)
Ethernet Port	2× 10/100M RJ45 Ports (Supports Cascading/Switch function)
Serial Interface	8× RS485 Ports (Independent channels)
Power Input	DC 9~24V (30mA@12V DC)	DC 18~36V (120mA@24V DC)
Optocoupler Isolation	Without isolation	3000V Isolation Included
Serial Specifications
Baud Rate	300 ~ 921600 bps
Data & Parity Bits	Data: 5 ~ 9 bits \| Parity: none, odd, even, mark, space
Software & Network
Protocols	TCP, UDP, HTTP, Modbus, MQTT, JSON, VirCom
Configuration	WEB Browser, Vircom, AT command
Environment & Dimensions
Operating Temp.	-40°C ~ +85°C
Dimensions	L 15cm × W 10.5cm × H 4.1cm

High-Density 8-Channel Industrial Gateway

The 8CH-RS485-ETH is a high-density IoT gateway, dedicated to complex industrial architectures that require multi serial connections. It provides 8 fully independent RS485 interfaces, perfectly blending a powerful serial server, Modbus gateway, MQTT gateway and RS485-to-JSON edge converter into one central node.

Dual Ethernet Cascading & Optional 3000V Isolation

Built-in switch, 2 x 10/100M Ethernet ports, designed to make the wiring within large control cabinets much easier. This allows easy daisy-chaining of multiple gateways. The standard version (V) is powered from a 9~24V DC input. For severe electrical environments, the enhanced (VI) version provides 3000V optocoupler isolation to all ports with heavy-duty 18~36V DC power supply to protect against worst-case ground loops.

Advanced Modbus & MQTT Routing

Besides transparent transmission, each of the 8 channels can be independently configured. It has the advanced storage-type Modbus gateway features, supports multi-host concurrent polling without bus collision. It also natively parses Modbus RTU and DL/T 645 to JSON for automated telemetry uploads via MQTT or HTTP POST directly to enterprise clouds like AWS, Azure or private brokers.

Documents

📄 Valtoris 8CH-RS485-ETH (V)/(VI) User Manual 📝 Bid Specifications for Integrators (.doc)

Utilities

⚙️ Setup Software: VirCom 7.22

Technical FAQ & Troubleshooting

Why should I choose the (VI) 3000V isolated version for an 8-port gateway?

The copper wiring needs to be managed over large areas of the factory floor to 8 separate RS485 loops, greatly increasing the chance of picking up electromagnetic noise or suffering from ground potential differences. The (VI) version uses 3000V optocoupler isolation which is a critical firewall to prevent a surge on one RS485 loop from frying the gateway or affecting the other 7 channels.

How does the Dual Ethernet port (Cascading) function work?

The dual RJ45 ports are integrated 10/100M unmanaged network switch. If you need to install multiple 8-port gateways in the same control cabinet, you can daisy-chain multiple gateways using standard patch cables. You only need to plug one gateway directly into your main uplink router, eliminating the need for an external DIN-rail switch altogether and saving you massive panel space.

Can I set different baud rates and protocols for each of the 8 serial ports?

Yes. All 8 RS485 channels operate entirely independently. Through the built-in Web browser or Vircom utility, you can configure Port 1 to act as a Modbus RTU gateway at 9600bps, Port 2 as a transparent TCP Server at 115200bps, and Port 3 to parse data into JSON for MQTT upload—all simultaneously without interference.

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