1.2 Housing and protection class (IP rating)

An industrial-grade metal housing (e.g., aluminum) with at least IP30 is essential for protection against dust and physical impacts. For outdoor installations, weatherproof housings with IP65 or higher are used, including UV resistance for roof or field installations.

1.3 Fanless Design

A fanless design is ideal for dusty or explosion-prone environments where moving parts could fail or pose risks.

1.4 Mounting

DIN rail mounting allows for easy installation in control cabinets and industrial panels - typical for automation and SCADA systems. Additionally, wall and desktop mounting are supported.

1.5 EMC Protection

The router must have certified protection against electromagnetic interference (EMI), an important criterion in production.

1.6 Power Supply

Industrial models typically support a wide DC input voltage range (e.g., 9-36 V or 9-48 V DC) with reverse polarity protection. External surge protection devices on power and antenna lines protect against lightning or voltage spikes.

2. 5G Mobile Characteristics

2.1 5G NR - SA (Standalone) and NSA (Non-Standalone)

Unlike LTE, 5G does not use numbered categories. Instead, 5G capability is defined by 3GPP releases, deployment architecture (NSA (Non-Standalone) vs. SA (Standalone)), and usage profiles. Our recommendation: The router should support both SA and NSA and be backward compatible with 4G LTE (at least Cat 12, preferably Cat 19/20) to ensure maximum coverage.

2.2 Frequency Bands

Different regions and operators support different 5G frequency bands. When purchasing a router, it must be ensured that the device supports the 5G bands of the respective region or operator.

- Sub-6 GHz (e.g., n77/n78 at 3.3-3.8 GHz): Industry standard for campus and public 5G networks in Europe

- mmWave (e.g., n258 at 24-28 GHz): Extremely high throughput but short range - for specific indoor scenarios

- 4G-LTE fallback bands: Extensive FDD and TDD band support

2.3 Data Rates

Industrial 5G routers achieve downlink speeds of up to 3.4 Gbps and uplink speeds of up to 1 Gbps in the sub-6 GHz range.

2.4 Dual-SIM with Auto-Failover

Dual-SIM failover is the "gold standard": The device accepts SIM cards from two different mobile network operators. Dual-SIM cards ensure link failover and provide connection stability, while also avoiding roaming costs. A combination of a regular SIM card and an eSIM offers even more flexibility.

3. The Three 5G Service Types (3GPP) and Their Industrial Relevance

4. Network Slicing

A critical technological differentiator is Network Slicing: It allows a single physical 5G network to be partitioned into multiple virtual networks, each optimized for a specific application.

Example in Practice:

A router on a safety-critical robot can be assigned to a URLLC slice with guaranteed priority and low latency. At the same time, a router on a surveillance camera can be assigned to an eMBB slice for high video throughput. The isolation ensures that an increase in video traffic never affects the critical control signals of the robot.

5. Connectivity and Interfaces

5.1 Ethernet Ports

Gigabit Ethernet ports (typically 4-5 ports) enable high-speed cable connections. Multiple input/output interfaces allow for the connection of various devices - from cameras to PLCs.

5.2 Serial Interfaces (RS232/RS485)

Industrial 5G routers feature RS232 and RS485 interfaces for seamless integration of legacy devices and controls. They support Modbus RTU/ASCII, UDP/TCP client-server communication, and serial-to-Ethernet conversion to connect older devices with modern 5G and Ethernet networks.

5.3 WiFi

WiFi 6 enables 2.4 GHz and 5 GHz dual-band connections with download speeds of up to 1.8 Gbps.

5.4 GNSS / GPS

Integrated GPS and GNSS (Galileo, GLONASS, QZSS, BeiDou) enable real-time location tracking of remote assets.

5.5 Digital I/O (DI/DO)

Digital inputs and outputs (typically 1x DI, 1x DO) allow for the direct connection of simple sensors, relays, and alarms.

6. Industrial Protocol Support

For a wide range of applications in IoT, the router is compatible with common industrial real-time Ethernet and fieldbus protocols, including: Modbus TCP, Modbus RTU, OPC UA, PROFINET, PROFIBUS-DP, EtherCAT, EtherNet/IP, CC-LINK, PPI, and more.

Additionally, the router should support the following IT/IOT protocols:

UDP, TCP, Modbus, HTTPD, WebSocket, MQTT, and other protocols for converting serial devices.

7. Network Security

7.1 VPN

The device must support multiple robust VPN protocols (e.g., IPsec, OpenVPN, WireGuard) to create secure, encrypted tunnels for all traffic and protect it from eavesdropping.

7.2 Stateful Firewall

A powerful Stateful Firewall allows granular rules that precisely control which traffic is allowed in and out, thus preventing unauthorized access.

7.3 Zero Trust and Access Control

The security posture must shift from perimeter defense to a Zero Trust Architecture (ZTA). The router acts as a Policy Enforcement Point (PEP) and enforces strict Access Control Lists (ACLs) based on identity, not just IP address.

7.4 IEC 62443

Manufacturers that follow a secure development lifecycle according to IEC 62443 ensure that security is "built-in" and not added later.

8. High Availability and Redundancy

8.1 Multi-WAN-Failover

Automated failover/failback between Ethernet, cellular (dual-SIM), and WiFi ensures maximum availability.

8.2 Hardware Watchdog

Industrial 5G routers should provide monitoring functions for software operational disruptions. In the event of a critical failure such as an infinite loop, the device must automatically restart and immediately generate an error report.

8.3 Availability Targetarkeitsziel

Hardware and software redundancies - such as dual-SIM failover and proactive link management - guarantee 99.999% uptime.

9. Edge Computing

The most advanced industrial connectivity devices are more than just routers - they are powerful computers. The ability to process data locally at the network edge is a game changer: the router can analyze data from sensors or PLCs on-site and only send critical insights or alerts to the cloud. This reduces bandwidth costs, improves response times, and enhances data privacy.

Typical edge platform features:

Combination of 5G modem, powerful quad-core ARM processor (e.g., 1.6 GHz), and dedicated NPU (Neural Processing Unit) for hardware-accelerated AI.

Modern industrial 5G routers are sophisticated edge computing platforms that often utilize hardened Linux-based operating systems and can host Docker containers.

10. Remote management and fleet management

Cloud management saves significant costs by drastically reducing expensive on-site visits. Administrators can remotely monitor device status, diagnose issues, and roll out firmware or security updates to an entire fleet of routers from a central location, improving efficiency and uptime.

Typical features:

- Zero-Touch Provisioning (automatic commissioning)

- OTA firmware updates (Over-the-Air)

- Central dashboard for monitoring, alerting, configuration

11. Durability and lifecycle

Industrial routers are expected to operate continuously for 5-10 years under demanding conditions.

It is advisable to look for extended warranties (3-5 years) with renewal options.