EG8208 8-Port RS485 Edge Gateway – 4G LTE Modbus to MQTT/JSON Converter

Name: EG8208 8-Port RS485 Edge Gateway - 4G LTE Modbus To MQTT/JSON Converter - IOTROUTER
Brand: IOTRouter
Price: 100 USD
Availability: InStock

Serial to Ethernet Converter for Industrial Networks

A versatile gateway for connecting multiple RS485 devices to Ethernet networks, ideal for complex industrial deployments and IoT integration.

Industry Protocols

CJ188 / DLT645 / HJ212 / Modbus / OPC UA / BACnet, etc

Network Protocols

MQTT / HTTP / TCP / UDP / WEBSOCKET

INTERFACE

8*RS485, 8*DO, 1*WAN/LAN

COMMUNICATION

LTE 4G

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Description

The EG8208 is an industrial-grade 8-Port RS485 Edge Gateway designed for multi-device industrial networking in demanding environments. It enables bidirectional transparent data transmission between RS485 and Ethernet, while supporting Modbus RTU to TCP conversion, multi-host polling, and user-defined JSON data reporting for flexible integration.

With built-in Node-RED, multiple operating modes, and support for a wide range of PLC protocols, the EG8208 is well-suited for factory automation, outdoor deployments, and industrial IoT applications, enabling stable and efficient data connectivity and protocol integration across diverse scenarios.

Key Features

RS485 Serial Interface

8 isolated channels, 1200–115200 bps configurable per port

Multiple Operational Modes

Supports TCP Server/Client, UDP, MQTT, and HTTP Client modes

Remote Virtual LAN

Secure VPN for remote PLC program upload/download

Multi-Protocol

Seamless communication across different protocols

Low-Code Development

Drag-and-drop logic for serial data processing and control

Remote Management

Remote configuration, debugging, and program updates

Reliable Connectivity

4G / Ethernet / Wi-Fi with auto failover

Industrial-Grade

Operates from −40°C to 85°C with 9–36V wide voltage input

* Support OEM/ODM, contact customer service for details.

EG8208 02

EG Series Products

All gateways in the EG series share a highly consistent operating method. Differences between models are mainly reflected in hardware interfaces, and the corresponding variations are limited to the presence or absence of certain functional nodes.

EG Series	8200 Pro	8200	8200 Mini				8200 Lite	8208	2000
Key Feature	High Performance	Multi-interface	Standard Version	DIN-rail Version	CNC Version	IEC104 Version	Low Cost	8 Serial Ports	LoRa Gateway
Processor	Octa-core A55 @1.8GHz	Dual-core A7 @1.2GHz	Dual-core A7 @1.2GHz	Dual-core A7 @1.2GHz	Dual-core A7 @1.2GHz	Dual-core A7 @1.2GHz	A7 @1.2GHz	Dual-core A7 @1.2GHz	Dual-core A7 @1.2GHz
Memory	2GB	512MB	512MB	512MB	512MB	512MB	256MB	512MB	512MB
eMMC	16GB	4GB	4GB	4GB	4GB	4GB	4GB	4GB	4GB
SD Card	Max 128GB (optional)	Max 128GB (optional)	Max 128GB (optional)	Max 128GB (optional)	Max 128GB (optional)	Max 128GB (optional)	×	Max 128GB (optional)	Max 128GB (optional)
4G	√	√	√	√	×	√	√	√ (optional)	√ (optional)
5G	√ (optional)	×	×	×	×	×	×	×	×
HDMI	√	×	×	×	×	×	×	×	×
Ethernet Ports	1×WAN + 1×LAN	1×WAN + 1×LAN	1×WAN + 1×LAN	1×WAN + 1×LAN	1×WAN + 1×LAN	1×WAN + 1×LAN	1×WAN/LAN	1×WAN/LAN	1×WAN/LAN
LoRa	×	×	×	×	×	×	×	×	√
Wi-Fi	Dual-band Wi-Fi 6	Dual-band Wi-Fi 6	Dual-band Wi-Fi 6	Dual-band Wi-Fi 6	Dual-band Wi-Fi 6	Dual-band Wi-Fi 6	×	×	×
GPS	×	√	×	×	×	×	×	×	×
USB	2×USB 2.0	1×USB 2.0	×	×	×	×	×	×	×
RTC	√	√	√	√	√	√	×	√	√
RS485	3	2	2	2	2	2	2	8	1
RS232	1	1	1	1	1	1	×	×	×
CAN	×	2	×	×	×	×	×	×	×
DO	2	2	×	×	×	×	×	8	×
DI	2	2	×	×	×	×	×	×	×
AO	2	×	×	×	×	×	×	×	×
AI	2	×	×	×	×	×	×	×	×
Operating Voltage	9~36V	9~36V	9~36V	9~36V	9~36V	9~36V	9~36V	9~36V	9~36V
Operating Current	500mA@12V	280mA/12V	150mA/12V	150mA/12V	150mA/12V	150mA/12V	60mA/12V	170mA/12V	180mA/12V
Certification	CE	CE	CE	CE	CE	CE	CE	CE	CE
Operating Temperature	-40 ~ 85°C	-40 ~ 85°C	-40 ~ 85°C	-40 ~ 85°C	-40 ~ 85°C	-40 ~ 85°C	-20 ~ 85°C	-40 ~ 85°C	-40 ~ 85°C
Remote O&M	√	√	√	√	√	√	√	√	√
Remote Management	√	√	√	√	√	√	√	√	√
Remote Upgrade	√	√	√	√	√	√	√	√	√
Virtual Network Interface	√	√	√	√	√	√	√	√	√
Virtual Serial Port	√	√	√	√	√	√	√	√	√
Local Database	√	√	√	√	√	√	×	√	√
Visual Programming	√	√	√	√	√	√	√	√	√
PLC Protocol	√	√	√	√	×	√	×	√	×
CNC Protocol	×	×	×	×	√	×	×	×	×
IEC 60870-5-104	×	×	×	×	×	√	×	×	×
Web Configuration	√	×	×	×	×	×	×	×	×
Industry Protocols	CJ188/DLT645/HJ212/Modbus/OPC UA/BACnet/etc.	Identical	Identical	Identical	Identical	Identical	Identical	Identical	Identical
Network Protocols	MQTT / HTTP / TCP / UDP / WebSocket / Alibaba Cloud IoT Platform / OneNET / etc.	Identical	Identical	Identical	Identical	Identical	Identical	Identical	Identical

Quick Access to EG Series Products →

Main Functions

Massive PLC Protocols

– Highly Compatible –

The EG8208 8-Port RS485 Edge Gateway supports docking various mainstream CNC brands, including but not limited to SIEMENS, MELSEC, Mazak, Heiden-hain, Haas, KND, LNC, Fanuc, Brother, GSK, CITIZEN, SYNTEC, and so on. Please contact us to get the list of the specific CNC protocol models.

Multi-Protocol Support

This gateway supports standard industrial protocols, including Modbus, MQTT, OPC UA/DA, HJ212, and IEC104, enabling seamless integration with SCADA systems, cloud platforms, and other third-party applications.
For non-standard protocols, custom parsing and logic can be implemented using JavaScript (JS).

8-Channel Independent Power Supply

8-channel independent power supply for sensors. The external power supply voltage is equal to the gateway power supply voltage. The maximum current per channel is 1A, and the maximum total current is 4A.

Encryption Transmission

Use two-way certificate verification + SSL encryption transmission mechanism to ensure data security. Transmission protocols such as TCP, HTTP, and MQTT can all achieve anti-eavesdropping, anti-tampering, and anti-impersonation.

Remote Virtual LAN/ Serial Port

– PLC Remote Upload & Download –

With Virtual Ethernet and Virtual Serial Port, engineers can remotely access PLCs, HMIs, and serial devices for programming, maintenance, and debugging as if they were on the same local network.

Remote Management

With EGManager remote management software, this multi-port gateway can realize remote configuration, remote debugging, remote diagnosis, remote program update, and other functions for the equipment on site.

CNC Gateway for Industrial Data Acquisition and Protocol Conversion02

Drag & Drop Programming

Built on Node-RED drag-and-drop visual programming, EG8208 supports all traditional serial server functions without communication restrictions. It enables users to customize data formats and logic, seamlessly integrating sensors and third-party platforms via MQTT/JSON to build simple, flexible, and efficient IoT automation workflows.

Multiple Working Modes

1. TCP Server

Monitor the set port and wait for a TCP client connection. Transmit the data sent by the serial device transparently to all successfully connected client-side.

TCP Server

2. TCP Client

Initiate a TCP connection to the set IP address. lf fail, EG8208 will continue to try to reconnect until it succeeds. lf connect well, the server can transparently transmit data bidirectionally with the serial port device.

TCP Client

3. UDP Mode

Send the serial device data to the specified lP network device via UDP mode. EG8208 also monitors the port and forwards all received data to the serial device.

UDP Mode

4. MQTT Mode

Support communication between serial data and servers through the MQTT protocol.

MQTT Mode

5. HTTP Client

Support submission of serial data to designated servers via HTTP.

HTTP Client

6. Simultaneous Access From Multiple Hosts

Allow multiple computers to access the same serial port device at the same time
Only in the question-and-answer query mode.

Simultaneous Access From Multiple Hosts

8-Port RS485 Edge Gateway Applications

1. Multi-Channel Serial Device Centralized Collection and Reporting

This is the most typical application of the EG8208 8-Port RS485 edge gateway. In smart water, environmental monitoring, and smart agriculture, there are often numerous distributed 485 devices on site, such as flow meters, water quality sensors, and weather stations. The EG8208 can connect all these devices in one go, collect and process the data centrally, and upload it to the cloud platform or data center via 4G or wired network.

2. Industrial On-Site Protocol Conversion and Data Integration

The gateway comes with a rich protocol library, supporting industry protocols such as Modbus, DLT645, and CJ188. It also supports communication protocols of mainstream PLCs, including Siemens and Mitsubishi. The EG8208 can convert data from different protocols into a unified format (e.g., MQTT, HTTP), making it easy to interface with upper-level systems such as MES and SCADA.

3. Networking with IO Acquisition Terminals to Build a Distributed System

The EG8208 can act as a central gateway and network with multiple remote IO acquisition terminals like the ET3410 via the MQTT protocol, forming a distributed monitoring system with wider coverage and enabling remote access to distributed digital and analog signals.

The Core Advantage

The EG8208 is an industrial communication hub designed for multi-serial scenarios, especially suitable for cases where numerous distributed serial instruments and sensors need to be centrally networked and intelligently processed.

FAQ

Q1: Is the EG8208 industrial-grade and suitable for harsh environments?

A1: Yes, the EG8208 is a true industrial-grade gateway:

- Wide operating temperature: -40℃ to 85℃, suitable for extreme conditions.
- Rugged and durable: Enclosure made of galvanized steel, supports DIN35MM standard rail mounting, with a compact footprint of 133 × 106 × 25 mm.
- Strong anti-interference capability: Features ESD and surge protection, and has passed relevant EMC testing.

Q2: Does it support other networking options besides 4G?

A2: Yes. The EG8208 comes with a standard 4G full-network module (optional Quectel CAT4 module) and also offers a 10/100/1000M adaptive Ethernet port (WAN/LAN), enabling flexible wired or wireless Internet access depending on the on-site network conditions.

Product Size and Ports

EG8208

Packing List

EG8208_8_11zon

PLC Protocols

EG8000 Series Edge Computing Gateway PLC Protocols

The gateway is categorized according to the hierarchical structure of brand->protocol->model, and representative PLC models are selected for testing in each category. The rest of the supported models are from the official documents. Note: The gateway supports the standard MOBUDS RTU/TCP protocol, which is supported by all mainstream PLCs. (For example, HollySys, Haiwell, Yokogawa, Runpower, etc.)

Brand	Protocol	Interface	PLC Model
SIEMENS	Tips:		Siemens in the sale of the series all support S7 protocol communication, it is recommended to use the S7 protocol communication.
	S7	Ethernet	S7-S200smart, S7-S200 Series, S7-S300 Series, S7-S400 Series, S7-S1200 Series, S7-S1500 Series
	PPI	Serial port	S7-200 Series
MELSEC	Tips:		Mitsubishi mainly uses MC protocol for communication, FX5 Series, FX3 Series, Q Series, etc. are tested.
	EtherNet/IP	Ethernet	FX5-ENET/IP Series, RJ71EIP91 Series, QJ71EIP71 Series
	MC-1E/MC-3E	Ethernet	FX5 Series, RJ71EN71 Series, RnENCPU Series, LJ71E71 Series, QJ71E71 Series, QnUCPU Series, FX3 Series
	MODBUS TCP	Ethernet	FX5 Series, RJ71EN71 Series, RnENCPU Series, LJ71E71 Series, QJ71E71 Series
	MC-3C	Serial port	FX5 Series, RJ71C24 Series, LJ71C24 Series, QJ71C24 Series
	MODBUS RTU	Serial port	FX5 Series, RJ71C24 Series, LJ71C24 Series, QJ71C24 Series, FX3 Series
	FxLinks	Serial port	FX3 Series, FX2 Series, FX1 Series, FX0 Series
	FxSerial	Serial port	FX3 Series, FX2 Series, FX1 Series, FX0 Series
OMRON	Tips:		Omron mainly uses the Fins protocol for communication.
	EtherNet/IP	Ethernet	NX7 Series, NX1 Series, NX1P Series, NJ Series, CJ1W-EIP21
	Fins	Ethernet	CP Series, CS Series, CJ Series, CV Series
	HostLink	Serial port	CP Series, CS Series, CJ Series, CV Series, C Series
LSis	Tips:		LS mainly uses FEnet/Cnet protocol for communication.
	XGB FEnet	Ethernet	XGB Series (XBC/XEC U, XBL-EMTA)
	XGK FEnet	Ethernet	XGT Series (XGL-EFMT, XGL-EFMF, XGL-EH5T)
	XGB Cnet	Serial port	XGB Series (XBC/XEC U, XBL-C21A, XBL-C41A)
	XGK Cnet	Serial port	XGT Series (XGL-CH2A, XGL-C21A, XGL-C41A)

Brand	Protocol	Interface	PLC Model
AllenBrandly	Tips:		Rockwell mainly uses CIP, DF1 protocol for communication.
	EtherNet/IP	Ethernet	ControlLogix Series, CompactLogix Series, Micro800 Series (820, 850, 870)
	DF1	Serial port	ControlLogix Series, CompactLogix Series (5069-SERIAL module) , Micro800 Series (820, 830, 850, 870) SLC Series (500, 5/03, 5/04, 5/05) , Micro-Logix Series (1000, 1100, 1200, 1500)
Beckhoff	Tips:		Beckhoff mainly uses the ADS protocol for communication.
Beckhoff	ADS	Ethernet	CX Series, TwinCAT2, TwinCAT3
Inovance	Tips:		Inovance mainly adopts MODBUS protocol for communication.
	MODBUS TCP	Ethernet	AC Series, AM Series, H5U Series, H3U Series
	MODBUS RTU	Serial port	AC Series, AM Series, H5U Series, H3U Series, H1U Series
Keyence	Tips:		Keyence mainly uses the KV protocol for communication.
	MC-3E	Ethernet	KV-8000 Series, KV-7000 Series, KV-5500 Series, KV-5000 Series KV-EP21V, KV-LE21V, KV-LE20V, KV-LE20A and other Ethernet units
	KV	Ethernet
	KV	Serial port	KV-7300, KV-3000, KV-1000, KV-700, KV Nano, KV-L21V, KV-L20V
Panasonic	Tips:		Panasonic mainly uses the Mewtocol protocol for communication.
	MC-3E	Ethernet	FP7 Series, FP0H Series, FP-XH Series
	Mewtocol	Ethernet	FP7 Series, FP0H Series, FP-XH Series
	Mewtocol	Serial port	FP7 Series, FP0H Series, FP-XH Series, FP-X0 Series, FP0R Series
Delta	Tips:		Delta mainly uses MODBUS protocol for communication.
	MODBUS TCP	Ethernet	AH Series, AS Series, AX-3 Series, DVP Series (built-in Ethernet)
	MODBUS RTU	Serial port	AH Series, AS Series, AX-3 Series, DVP Series
XinJE	Tips:		XinJE mainly uses MODBUS protocol for communication.
	MODBUS TCP	Ethernet	CCSD Series, XA Series, XS Series, XG Series, XL Series
	MODBUS RTU	Serial port	CCSD Series, XA Series, XS Series, XG Series, XL Series, XC Series, XD Series
MegMeet	Tips:		MegMeet mainly uses MODBUS protocol for communication.
	MODBUS TCP	Ethernet	MC5100 Series, MC280 Series, MC200 Series, MC100 Series, MC80 Series
	MODBUS RTU	Serial port	MC5100 Series, MC280 Series, MC200 Series, MC100 Series, MC80 Series
Yaskawa	Tips:		Yaskawa mainly uses the MEMOBUS protocol for communication (supports S7) .
Yaskawa	Memobus	Ethernet	GL120/130 Series, GL60 Series, MP3000 Series, MP2300 Series, Z1000 Series
Fatek	Tips:		Fatek mainly uses the Fatek protocol for communication.
Fatek	Fatek	Serial port	FBs Series
Vigor	Tips:		Vigor mainly uses the VS private protocol for communication.
Vigor	VS	Serial port	VS Series
Fuji	Tips:		Fuji mainly uses the SPH/SPB protocol for communications.
	SPH	Ethernet	SPH Series
	SPB	Serial port	SPB Series

Datasheet

Core Configuration	CPU	2 Cores A7@1.2G
	Memory	512M
	EMMC	4G
Storage	SD card	128G max（Optional）
4G	Module	Quectel-CAT4（4G/Ethernet Optional）
	Frequency Band	LTE-FDD：B1/B3/B5/B8 LTE-TDD：B34/B38/B39/B40/B41 WCDMMA：B1/B5/B8 GSM：900/1800MHz
	Transmit Power	LTE-TDD: Class 3 (23 dBm ±2 dB) LTE-FDD: Class 3 (23 dBm ±2 dB) WCDMA: Class 3 (24 dBm +1/-3 dB) PCS1900 8-PSK: Class E2 (26 dBm ±3 dB) DCS1800 8-PSK: Class E2 (26 dBm ±3 dB) EGSM900 8-PSK: Class E2 (27 dBm ±3 dB) GSM850 8-PSK: Class E2 (27 dBm ±3 dB) PCS1900: Class 1 (30 dBm ±2 dB) DCS1800: Class 1 (30 dBm ±2 dB) EGSM900: Class 4 (33 dBm ±2 dB) GSM850: Class 4 (33 dBm ±2 dB)
	Bandwidth (The maximum rate is theoretical, and the actual rate refers to the network configuration.)	LTE-FDD：Max 150Mbps(DL)/Max 50Mbps(UL) LTE-TDD：Max 130Mbps(DL)/Max 30Mbps(UL)
Ethernet	WAN/LAN	1 * 10M/100M/1000M Self-Adaptive
RS485	Number of Interfaces	8-way
	Terminals	A、B
	Baud Rate	2400~921600bps
	Data Bits	7、8
	Stop Bits	1、2
	Check Digit	NONE（No Check Digit）EVEN（Even Check）ODD（Odd Check）
	Protection	Anti-static, Anti-surge
RTC	Local Clock	√
Electrical Parameters	Authentication	CE
	Adapter	12V/2A
	Operating Voltage	9~36V
	Operating Current	170mA/12V
Environmental Parameters	Operating Temperature	-40~85℃
	Storage Temperature	-40~85℃
	Environment Humidity	0~95%RH（No Condensation）
	Store Humidity	0~95%RH（No Condensation）
Mechanical Parameters	Size	13310636mm
	Housing Material	Galvanized Stee
	Installation	Screw-fastened
	Heat Dissipation	Passive Cooling
	REST Button	Press and Hold for 10s to Reset
EMC	Electrostatic Discharge	Air Discharge level3 ±8KV Contact Discharge level2 ±4KV
	Surge	level2 ±1KV
	Burst（EFT）	level2 ±1KV
Software Features	Remote O&M	√
	Remote Management	√
	Remote Upgrades	√
	Virtual Network Port	√
	Virtual serial port	√
	Time Series Databases	√
	Visual Programming	√
	PLC Protocols	√
	Industry Protocols	CJ188 / DLT645 / HJ212 / Modbus / OPC UA / BACnet, etc
	Network Protocols	MQTT / HTTP / TCP / UDP / WEB SOCKET / Alibaba Cloud IoT Platform / OneNET, etc
System	System	Linux

4G bands

*You may contact customer service to select the corresponding module for replacement.

Module Tyle	Frequency Bands
EC800K-CN	LTE FDD: B1/B3/B5/B8 LTE TDD: B34/B38/B39/B40/B41
EG800K-EU	LTE FDD: B1/B3/B5/B7/B8/B20/B28
EG800K-LA	LTE FDD: B2/B3/B4/B5/B7/B8/B28/B66

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EG8208 8-Port RS485 Edge Gateway – 4G LTE Modbus to MQTT/JSON Converter

Serial to Ethernet Converter for Industrial Networks

Description

Key Features

RS485 Serial Interface

Multiple Operational Modes

Remote Virtual LAN

Multi-Protocol

Low-Code Development

Remote Management

Reliable Connectivity

Industrial-Grade

EG Series Products

Main Functions

Massive PLC Protocols

– Highly Compatible –

Multi-Protocol Support

8-Channel Independent Power Supply

Encryption Transmission

Remote Virtual LAN/ Serial Port

– PLC Remote Upload & Download –

Remote Management

Drag & Drop Programming

Multiple Working Modes

1. TCP Server

3. UDP Mode

4. MQTT Mode

5. HTTP Client

6. Simultaneous Access From Multiple Hosts

8-Port RS485 Edge Gateway Applications

1. Multi-Channel Serial Device Centralized Collection and Reporting

2. Industrial On-Site Protocol Conversion and Data Integration

3. Networking with IO Acquisition Terminals to Build a Distributed System

The Core Advantage

FAQ

Q1: Is the EG8208 industrial-grade and suitable for harsh environments?

A1: Yes, the EG8208 is a true industrial-grade gateway:

Q2: Does it support other networking options besides 4G?

Product Size and Ports

Packing List

PLC Protocols

EG8000 Series Edge Computing Gateway PLC Protocols

Datasheet

4G bands

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