RLTK421 Industrial 4G/LTE VPN Router

Model: RLTK421
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In Stock
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RLTK421 Industrial 4G/LTE VPN Router is a compact, robust and powerful device specially designed for industrial IoT applications. RLTK421 is equipped with 2x Ethernet (LAN / WAN) and WiFi with hotspot functionality. Multi VPN options like OpenVPN, IPsec, Firewall, Hotspot and remote connection. Provides secure and stable Internet connection for industrial applications with features such as support.


Robust and Powerful Industrial 4G LTE Router

Experience seamless connectivity and enhanced security with the RLTK421 Industrial 4G LTE VPN Router from Roltek. This cutting-edge router is designed to elevate your networking capabilities, providing reliable communication for industrial environments.

Key Features:

  • High-Speed 4G LTE Connectivity: Stay connected even in remote locations with high-speed 4G LTE connectivity. This router ensures smooth data transmission and enables real-time monitoring, giving you the power to stay in control.
  • VPN Support for Enhanced Security: Protect your data and ensure privacy with built-in VPN support. The RLTK421 Router offers secure remote access, allowing you to connect to your industrial network with confidence.
  • Industrial-Grade Reliability: Engineered for durability, the RLTK421 is built to withstand harsh industrial environments. Its robust design ensures continuous performance, making it the ideal choice for critical applications.
  • Multi-Port Connectivity: With a range of Ethernet and serial ports, this router offers versatile connectivity options, allowing you to integrate various devices seamlessly.
  • User-Friendly Interface: Enjoy a hassle-free setup and configuration with a user-friendly interface. Even without extensive technical knowledge, you can have the router up and running in no time.

Enhance Your Connectivity, Empower Your Operations:

The RLTK421 Industrial 4G LTE VPN Router is more than just a router; it’s a solution that enhances your connectivity and empowers your operations. Whether you’re managing a remote site, monitoring equipment, or establishing secure connections, this router provides the tools you need to succeed.

Choose the RLTK421 Industrial 4G LTE VPN Router for superior connectivity, security, and performance. Elevate your industrial networking capabilities with Roltek’s trusted technology.

For more information, visit our product page: RLTK421 Industrial 4G LTE VPN Router


Supports IPsec VPN, PPTP, L2TP, OPEN VPN, GRE, etc. Ensuring Secure Data Transmission


RLTK421 with routing and serial modem, which can easily achieve the bi-directional data transparent transmission between RS485 devices and 4G network, supports connecting to various cloud platforms.


Minimize latency with a high-speed LTE connection.


Supports email alarm and SMS alarm abnormal alarm push in time.


Supports 2.4GHz Wifi and covers up to 100m. Create Hotspot points for devices or humans with the optional Wi-Fi feature.


Automatically reconnects when the connection is lost. It has 4G, 3G, 2G, and WAN failover features.

Simple and Easy Installation

Long and complex installations are left behind. It is ready to use in a few minutes with its own built-in installation interface.

Easy Assembly and Installation

Compact size supports both panel and DIN-rail mounting, suitable for various industrial IOT applications.

Custom Configuration interface

Linux-based operating system with advanced features and development.

  • Industrial 4G LTE Router
  • VPN Router for Industrial Use
  • High-Speed Industrial Networking
  • Secure Remote Access Solution
  • Reliable Industrial Connectivity
  • Ethernet and Serial Port Router
  • Industrial-Grade VPN Connectivity

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Hardware of 4G LTE VPN Router
Cellular Interface Antenna 1 x SMA-KNote: North America models: 2 x SMA 4G antenna connectors.
SIM card 1 x (3 V & 1.8 V) Standard 2FF SIM, drawer-type sim card slots
Ethernet 1 x WAN port (can be configured to LAN) 10/100 Mbps, compliance with IEEE 802.3, supports auto MDI/MDIX,1.5KV network isolation transformer protection
1 x LAN port, 10/100 Mbps, compliance with IEEE 802.3, IEEE 802.3u standards, supports auto MDI/MDIX,1.5KV network isolation transformer protection
Indicators LED PWR: always on after powered on WLAN: always solid on when WiFi is enabled and working properly WAN: solid when cable is connected, blinking when data is transmitting and receiving LAN: solid when cable is connected, blinking when data is transmitting and receiving 2/3/4G mode indicator:2G led is on after connected to 2G network 3G led is on after connected to 3G network. Both leds is on after connected to 4G network. Signal strength:4 solid bars, strongest signal
WiFi Interface Standards & Frequency IEEE 802.11b/g/n,2.4GHz, AP mode
Data speed IEEE 802.11b/g,maximum 54Mbps.IEEE 802.11n, maximum 150Mbps
Antenna 1 x SMA-K
Transmission distance 80 meters by line of sight. Actual transmission distance depends on environment of the site.
Power Supply Adaptor DC 12V/1A
Connector DC Power Jack Barrel Type Female 5.5*2.1mm Round socket or 2 PIN 5.08mm industrial terminal block,reverse polarity protection
Input voltage DC 9~36V
Working power Average 270mA/12V
Serial Interface RS485/RS232(alternative) 3 PIN 3.81mm industrial terminal block. Note: RS485 default, RS232 please contact sales.
Baud rate(bps) 1200,2400,4800,9600,19200,38400,57600,115200,230400
Data bits 8
Stop bits 1,2
PhysicalCharacteristics Housing Metal shell, IP30
Dimensions 112.0*84.0*25.0 mm(L*W*H)
Installation method Panel mounting, DIN-Rail mounting
EMC Static IEC61000-4-2, level 2Pulsed Electric Field IEC61000-4-4, level 2Surge IEC61000-4-5, level 2
Operating temperature -20℃~+70℃
Storage temperature -40℃~+125℃
Operating humidity 5 5%~95%RH(non-condensing)
Others Reload Pinhole reset button
TBD Debug interface (TTL Level)
Embedded Watchdog Device runs self-detection, auto recovers from malfunctions
Certificate CE, FCC
NetworkConnection WAN protocol PPP, PPPoE, DHCP client
LAN protocol ARP, DHCP server, NAT
4G network access Auto APN/VPDN, private networkAccess authentication: CHAP/PAP
WLAN security Open system,WPA/WPA2 PSKTKIP/AES encryption
IP routing Static routing
Network diagnosis Ping, route trace, DNS
Serial modem Work mode NET,HTTPD
Sockets 4 sockets,4 centers, TCPS(SOCKA)/TCPC/UDPS/UDPC
Modbus RTU toTCP Support
Device management Configuration Web
Remote management Telnet, SSH, AT command, SNMP
FAST IoT Platform Remote monitoring, remote upgrade, alarming, base station location, remote access to web pages of the router
Security Failover backup Failover between 4G and WAN, ensures automatic switch to alternative backup connection
Firewall DMZ, anti-DoS, Filtering (IP/Domain name/MAC address), Port Mapping, Access Control
VPN Supports PPTP, L2TP, GRE, IPSEC VPN (IKEv1), OPEN VPN protocols
Service DDNS Remote access the device through domain name
Alarm Email, SMS Alarm
Others NTP clientTiming task
Region EMEA & Australia & Latin America & New Zealand
Frequency TDD-LTE B38/B40/B41
FDD-LTE B1/B3/B5/B7/B8/B20/B28
Serial modem B1/B5/B8
GSM/GPRS/EDGE 850/900/1800MHz

Additional information

Dimensions 11.2 × 8.4 × 2.5 cm


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