Teltonika TRB256 — Industrial M2M Gateway 4G (LTE) Cat-M1 / NB-IoT for IoT Deployments

The Teltonika TRB256 is an industrial NB-IoT / LTE Cat M1 gateway designed for low-power M2M and IoT applications requiring extended coverage. Support for the 450 MHz frequency band delivers superior LTE signal penetration compared to standard frequencies — making it the optimal choice for remote sites, rural areas, and underground infrastructure. Dual SIM with automatic failover, RS232 and RS485 serial interfaces, extended I/Os, and an integrated GNSS module provide a complete connectivity solution for telemetry, smart metering, and remote automation.

Running RutOS (OpenWrt-based), the TRB256 supports a comprehensive set of industrial protocols: Modbus RTU/TCP, BACnet RS485/TCP, OPC UA, DNP3, DLMS/COSEM, and Serial over IP. Multi-protocol VPN (OpenVPN, IPsec, WireGuard, ZeroTier, L2TP, PPTP, GRE, DMVPN, SSTP, Tinc) and dynamic routing (BGP, OSPF, RIP, EIGRP) deliver enterprise-grade secure connectivity. Native integration with Azure IoT Hub, AWS IoT Core, ThingWorx, and Cumulocity enables rapid deployment in cloud IoT architectures.

The GNSS module (GPS, with GLONASS/BeiDou/Galileo/QZSS under development) supports geofencing, TAVL tracking, NMEA 0183, and NTRIP protocol. All I/Os are accessible via a compact 16-pin industrial terminal block — 3× configurable digital inputs, 1× analog input (0–30 V), and 3× open collector digital outputs. The slim aluminium housing (83 × 25 × 74 mm, 165 g) with IP30 protection and an operating range of -40°C to +75°C is built for DIN rail installation in industrial enclosures.

• Mobile connectivity: LTE Cat M1 / Cat NB1 / Cat NB2 / EGPRS, 450 MHz band, Dual SIM
• Serial interfaces: RS232 (TX, RX, RTS, CTS) + RS485 Full/Half-Duplex, 16-pin terminal block
• Industrial protocols: Modbus RTU/TCP, BACnet, OPC UA, DNP3, DLMS/COSEM
• GNSS: GPS + NTRIP, geofencing, TAVL, NMEA 0183
• I/O: 3× digital inputs + 1× analog input (0–30 V), 3× open collector digital outputs
• Ethernet: 1× RJ45 10/100 Mbps
• Power: 9–30 VDC, reverse polarity protection, surge protection ±1 kV
• Dimensions: 83 × 25 × 74 mm, 165 g, DIN rail / wall mount
• Operating temperature: -40°C to +75°C
• Certifications: CE, UKCA, EAC, RCM, CB, WEEE