4G IOT Gateway

Industrial 4G IoT Gateway

Edge Pro LTE8421 4G IoT Gateway is a 4G IoT Gateway designed for industrial IoT solutions. Thanks to its quick and easy installation. It provides rapid integration into IoT applications and guarantees uninterrupted operation with its automatic reconnection feature even in case of temporary disconnections. With its advanced input/output features, it facilitates wireless communication between Modbus TCP/IP and Modbus RTU supported units and industrial equipment. In addition, thanks to the LTE Cat 1 module optimized for M2M and IoT applications, it reaches 10 Mbps downlink and 5 Mbps uplink data transfer rates. Also, offers flexible communication using 2G or 4G networks. Edge Pro LTE8421 optimizes data collection and analysis processes with automatic data collection and simplified rules engine support. With its compliance with industrial standards and wide operating temperature range, it provides reliable and effective performance in various industrial environments.

4G and 2G GSM Communication

It has 10 Mbps downlink and 5 Mbps uplink wireless communication with LTE Cat 1 module. It provides flexible communication network with 2G or 4G networks.

Simplified Rule Engine Support

The 4G IoT Gateway performs basic mathematical operations by automatically collecting data from devices identified by users. It can transmit these results to other devices. Thus controlling remote devices and transferring data.

Simple and Easy Installation

The 4G IoT Gateway is designed for easy assembly and installation. So, it can be quickly integrated into IoT applications. In addition to quick assembly and installation, the device remains connected and ready for use, thanks to automatic reconnection support, even in the event of a temporary disconnection.

Easy Assembly and Installation

It is suitable for industrial environments with DIN rail mounting.

Internal Web Interface

Thanks to the built-in web interface, you can easily configure it via 4G, Wi-Fi and ethernet without the need for program installation.

Automatic Data Collection

It automatically collects data and transfers it wherever you want.

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Advanced inputs and outputs with 4G IoT Gateway

In many applications, there is advanced input and output support with Modbus support. In this way, it reduces the total cost by reducing the use of extra PLCs.

  • 8 Digital Inputs / 4 Digital Outputs / 2 Analog Inputs / 1 Analog Output (Optional)
  • Automatic Data Collection
  • Modbus Master & Slave Support
  • IEC62056-21 Mode C (Meter Reading) Support
  • Simplified Rules Engine Support
  • 4G and 2G GSM Communication
  • WiFi Support
Top partners using Edge Pro LTE 8421 4G IoT Gateway
  • Samsun
  • Pirelli

4G and 2G GSM Communication

EdgePro LTE8421 can support wireless communication at up to 10 Mbps downlink and 5 Mbps uplink data transfer rates with the LTE Cat 1 module it uses, which is optimized for M2M and IoT applications. Additionally, it can use 2G or 4G networks depending on the area of use in the industrial environment.

Modbus TCP/IP, MQTT and Modbus RTU Supported Input/Output Unit

EdgePro LTE8421 has embedded I/O units that support Modbus protocols. In this way, it can provide wireless communication between industrial equipment. It can also be used as a remote input/output unit with cellular communication.

Automatic Data Collection

EdgePro LTE8421 collects data from other EdgePro LTE 8421 devices, PLCs, cellular-connected Modbus sensors at user-defined intervals. Optionally, it transmits this data to third-party software using the MQTT protocol.

Modbus Master & Slave Support

EdgePro LTE8421 can collect data from various devices thanks to the Modbus Master feature. In addition, it can be used as a gateway or as a remote Input/Output unit thanks to Modbus Slave support.

Simplified Rules Engine Support

EdgePro LTE8421 automatically collects data from user-defined devices. Also, performs basic mathematical operations on this data. It writes the results of these operations to the device itself or other EdgePro LTE8421 devices. This feature allows digital output activation based on a digital input at a different location. Or it enables data transfer from PLC to remote HMI panel.

IEC62056-21 Mode C Support (Optional)

EdgePro LTE8421 can be used in smart meter readings thanks to its IEC62056-21 Mode C support over RS232. It records the values it reads from electricity meters into Modbus registers. It can also transmit this data to third-party software using the MQTT protocol.

LTE8421 4G IoT gateway

Ethernet Ports 1x RJ45
Standard 1x 10/100 Mbps Ethernet
Distance 100m
Serial Ports 3x  Terminal Block
Standard  RS 485 3 Wire (+/ - / Earth Ground)
Baud Rate 300-115200
Parity Type Odd, Even, None
Stop Bit 1, 1.5, 2
Protection 15 KV ESD Protection, GDT Protection
Serial Ports 4x  Terminal Block (For IEC62056-21 - Optional)
Standard  RS 232 4 Wire (3.3V GND Rx Tx)
Baud Rate 300-19200
Parity Type Odd, Even, None
Stop Bit 1, 1.5, 2
Protection 15 KV ESD Protection
Standard IEEE 802.11b
Modes Station/AP
Security WEP, WPA/WPA2/ WPA3 PSK, WPA2 Enterprise, WAPI PSK
Frequency 2.4 GHz
Module LTE Cat 1
Frequency Band (LTE-FDD) B1/3/5/7/8/20/28
Frequency Band (GSM) B2/3/5/8
Maximum Data Rates (LTE-FDD) Downlink 10 Mbps - Uplink 5 Mbps
Maximum Data Rates (GSM) Downlink 85.6 kbps - Uplink 85.6 kbps
Protocols Modbus TCP/IP, MQTT, Modbus RTU
Gateway ModBus TCP/IP, ModBus RTU, MQTT
Data to Server HTTP, MQTT
Authentication Pre shared Key, Digital certificates, X.509 certificates  
Firewall Pre configured Rules can be used via the web UI, Black list/white list 
Encryption AES256
CPU Dual Core 32 Bit microprocessor
Operating System Embedded System
Firmware Update Can Be Updated Through Web Interface
Keep Setting Updating FW Without Losing Configuration Settings
LED Indicators Power, ACT, Network, RSSI, Digital Inputs, Digital Outputs 
Digital Inputs
Channel Isolated Digital Inputs
Input A In1 In2 In3 In4 - Input A COM
Input B In5 In6 In7 In8 - Input B COM
Isolation Protection 3500 V RMS
Input Voltage Range 10 - 24VDC
Digital Outputs
Channel Relay - SPST - NO(1 Form A)
Maximum Contact Rating 5 A 250 VAC, 3 A 24 VDC
Output A Out1 Out2 - Output A COM
Output B Out3 Out4 - Output B COM
Analog Inputs
Input A AIN1+ AIN1-
Input B AIN2+ AIN2-
Input Voltage Range 0-10 V DC
Input Current Range 4-20 mA
Analog Output (Optional)
Output Vout - GND
Output Voltage Range 0-10 V DC
Reset Button 1 second system reboot
5 second system reset 
10 second back to factory FW
Antenna SMA Female x2
2G/4G  Impedance: 50 Ohms
WiFi  Impedance: 50 Ohms
Ingress Protection IP40/Metal
Casing and Weight Aluminum Alloy 6060, 125 g 
Size 104 mm X 35 mm X 104 mm
Mounting Din Rail
Operating Temperature -40 to +85°C
Ethernet Isolation ESD
Relative Humidity 0% to %95(non-condensing) at 25°C
Regulatory  2014/35/EU Low Voltage Directive,
2014/53/EU Radio Equipment Directive
Standards EN 301 489-1 , EN 301 489-3, EN 301 489-7, EN 301 489-17
EN 55032:2015, EN 55024:2010+A1:2015, EN 60950-1:2006/ A2:2013
Management Interfaces Web UI
IP Version IPV4, IPV6
Operation Mode Modbus Gateway, Data collector
Time NTP
Security Allow max 1 acc. IP address host/ranges
Input Voltage 10-30 VDC
Power Consumption Rx <5W
Tx <18W
Connector 4 X Terminal Block
Power LED Blue: Power on
Off : No Power 
ACT Blue (Blink): Operating State
Off: Error State
Network Blue: Connected to the Internet
Off: Not Connected to the Internet
RSSI LED Blue: Excellent Signal Quality
Green: Good Signal Quality
Red: Poor Signal Quality
Off: No Network
Digital Input LED Blue: High level input
Off: Low level input
Digital Output LED Blue: Relay is on
Off: Relay is off
Ethernet Downlink/Uplink 10/100 Mbps
Wifi Downlink/Uplink up to 150 Mbps


LTE8421 8x 4x 2x - _
LTE8421-AO 8x 4x 2x 1x _
LTE8421-IEC 8x 4x 2x - Available
LTE8421-AO-IEC 8x 4x 2x 1x Available

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EDGEPRO LTE8421 4G IoT Gateway Compatible with FAST IoT Platform

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  • Device Management
  • Data Collection
  • Dashboards
  • Alarms

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Our main focus when creating products is centered around three core pillars: Reliability, security, and user-friendliness. We firmly believe that these components are crucial for achieving success in any IoT project.

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We have successfully completed more than 150 IoT projects.

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Real IoT Use Cases

Check out successful projects using Roltek products from many different sectors.


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"The process of creating an IoT device is complex, involving the integration of hardware and software. However, the results of this approach result in devices that are more secure, faster, and more user-friendly. Integrating hardware and software allows for better performance and easier maintenance of devices. Additionally, this approach enables IoT devices to be more scalable and developed more quickly. Ultimately, integrating hardware and software in IoT should be seen as an important way to create stronger and more efficient devices."

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