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LTE CatM1/NB-IoT RS232/RS485 TRB255 gateway

TRB255000000 | Teltonika Networks
The TRB255 is a compact industrial gateway with a CatM1/NB-IoT LTE modem and 2G fallback, RS232 and RS485 interfaces, an Ethernet port, digital I/O, analog input, dual SIM, GNSS, and a RutOS operating system. Ideal for M2M applications, it supports MQTT, Modbus, DNP3, and remote management via RMS.
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Description
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Description

The TRB255 is a CatM1/NB-IoT LTE gateway with 2G backward compatibility designed for low-power industrial applications. It features RS232 and RS485 serial interfaces, a 10/100Mbps Ethernet port, three configurable digital I/Os, an analog input (0"30V), and integrated GNSS for geolocation and geofence functions.

It supports dual SIMs with automatic failover and SIM idle protection, and a 9"30VDC power supply with reverse polarity and transient protection. Thanks to its idle power consumption of less than 1.2W, it is perfect for remote environments or battery operation.

The OpenWrt-based RutOS operating system includes static and dynamic routing, an advanced firewall, captive portal, NAT, bridge/passthrough, multi-protocol VPN (OpenVPN, IPsec, GRE, WireGuard, ZeroTier, DMVPN), DNS-over-HTTPS, SSHFS, and QoS.

It is compatible with IoT protocols such as MQTT, Modbus TCP, DNP3, and advanced SMS/USSD. It supports remote management via WebUI, SSH, SNMP, MQTT, JSON-RPC, TR-069, FOTA, and Teltonika RMS.

Made of IP30 aluminum, it can be mounted on a DIN rail or flat surfaces. It operates from "40°C to +75°C, with humidity up to 90% non-condensing. Dimensions: 83-25-74.2mm, weight approximately 165g.Main Features

  • LTE CatM1/NB-IoT modem, fallback to 2G network
  • RS232 and RS485 interfaces via screw terminal connector
  • 10/100Mbps Ethernet port, auto MDI/MDIX
  • 3 configurable digital I/Os and 1 analog input (0"30V)
  • Integrated GNSS with geofence and NTRIP support
  • Dual SIM with failover and SIM idle protection
  • RutOS: routing, firewall, NAT, captive portal, multiple VPN
  • MQTT, Modbus TCP, DNP3, SMS/USSD support Advanced
  • Remote management via RMS, WebUI, SNMP, SSH, MQTT, JSON-RPC, TR-069
  • Power supply 9"30 VDC, consumption <1.2W idle
  • IP30 aluminum enclosure, DIN rail or flat mounting
  • Dimensions 83 - 25 - 74.2 mm, weight approximately 165 g
  • Operating temperature "40°C/+75°C, humidity 10"90%

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