The TR321 and TR341 are rugged 4G routers that give a site internet access and also read serial devices. They connect PLCs, meters and cameras to your network and cloud over a mobile connection.
At a glance
- 4G LTE CAT 4 / 3G / 2G, or LTE-M / NB-IoT
- TR321: 1 RS232, 1 RS485, 2 Ethernet ports, optional 2.4 GHz Wi-Fi and GNSS
- TR341: 1 RS232, 1 RS485, 4 Ethernet ports, 2.4 GHz Wi-Fi, optional GNSS and dual SIM failover
- Programmable in C/C++ or Python (option); Modbus RTU/TCP, MQTT (TLS), JSON, TCP/UDP
- VPN, SNMP, SSH and CLI for secure remote management
Where it is used in Malaysia
- Remote sites and kiosks that need internet over 4G
- Connecting PLCs and meters to a SCADA over the mobile network
- CCTV and access control at sites without wired internet
- Backup internet link for small offices and shops
- Plantations and farms with mixed serial and Ethernet devices
See it in use


How it works
The router connects to the mobile network and shares the connection with your devices through its Ethernet ports and Wi-Fi. At the same time its RS232 and RS485 ports read serial devices and send the data to your server using Modbus, MQTT or your own program. VPN tunnels keep the traffic secure.
Order from AIBS
Ai Business Solutions Sdn Bhd supplies this product in Malaysia. Send us a quote request with the model, the quantity, the network (4G, 5G or LoRa) and the devices you want to connect, and we will reply within one working day.