Description
Teltonika TRB246 Industrial IoT Gateway – Specifications
The Teltonika TRB246 is a compact industrial 4G LTE Cat 4 IoT gateway with Dual SIM, Ethernet, RS232, RS485, configurable I/O and GNSS. For a portable attendance solution, it can act as the communications gateway between an attendance/biometric terminal and a remote server or cloud platform, provided the attendance device supports a compatible Ethernet or serial interface/protocol. Teltonika Networks
| Specification | Details |
|---|---|
| Brand | Teltonika Networks |
| Model | TRB246 |
| Product Type | Industrial IoT / Cellular Gateway |
| Cellular | 4G LTE Cat 4, 3G and 2G |
| Maximum LTE Speed | 150 Mbps download / 50 Mbps upload |
| SIM | Dual Mini-SIM (2FF), 1.8V/3V |
| SIM Features | Auto-switch/failover based on signal, data limit, roaming, network failure and other conditions |
| Ethernet | 1 × RJ45 10/100 Mbps |
| RS232 | 1 × RS232, via 16-pin terminal block |
| RS232 Speed | 300–115200 bps |
| RS485 | 1 × RS485, via 16-pin terminal block |
| RS485 Speed | 300–230400 bps |
| I/O | 3 × configurable digital I/O |
| Analog Input | 1 × 0–30V analog input |
| GNSS | GPS, GLONASS, Galileo, BeiDou and QZSS |
| Cellular Antenna | 1 × SMA |
| GNSS Antenna | 1 × SMA |
| Industrial Protocols | Modbus, DNP3, DLMS and other supported RutOS protocols |
| Operating System | RutOS, OpenWrt-based Linux OS |
| Remote Management | Teltonika RMS compatible |
| Management | WebUI/HTTPS, SSH, SMS and RMS |
| Power Input | 9–30V DC |
| Power Consumption | Approx. 1.5W idle / 3.5W maximum |
| Housing | Industrial aluminium enclosure |
| Dimensions | 83 × 25 × 74.2 mm |
| Weight | 165g |
| Operating Temperature | -40°C to +75°C |
| Operating Humidity | 10–90%, non-condensing |
| Ingress Protection | IP30 |
| Mounting | DIN rail, wall or flat-surface mounting with optional mounting kits |
These hardware specifications are confirmed by Teltonika’s official product page and datasheet. Teltonika Networks
Connectivity
The TRB246 provides LTE Cat 4 up to 150 Mbps downlink and 50 Mbps uplink, with 3G/2G fallback. Its two SIM slots provide redundancy, with automatic SIM switching based on conditions such as weak signal, roaming, data limits or loss of connectivity. Teltonika Networks
RS232, RS485 & Ethernet
For an attendance solution, these are particularly useful:
1 × Ethernet: 10/100 Mbps RJ45
1 × RS232: TX, RX, RTS and CTS
1 × RS485: D+, D−, R+ and R−
3 × configurable digital I/O
1 × analog input: 0–30V
The RS232 interface supports up to 115200 bps, while RS485 supports up to 230400 bps. Teltonika Networks Wiki
GNSS / Location
TRB246 also has integrated GNSS, supporting GPS, GLONASS, BeiDou, Galileo and QZSS. This can be useful in a portable attendance deployment where the gateway’s location needs to be recorded or monitored. Teltonika Networks
Suitability for Portable Attendance
For a portable attendance project, a typical architecture could be:
Biometric/Fingerprint/Face Attendance Terminal → Ethernet or RS232/RS485 → Teltonika TRB246 → 4G LTE → Internet/VPN → Attendance Server/Cloud Platform
This can be useful for construction sites, remote offices, field operations, temporary project locations, schools, events and locations without fixed broadband.
However, the TRB246 itself is not an attendance terminal. It does not provide fingerprint or facial recognition. Its role would be to provide secure cellular communications and connectivity for a compatible attendance device.
Power for Portable Deployment
The gateway accepts 9–30V DC, which makes integration with a portable DC power system practical. Teltonika specifies low consumption of about 1.5W at idle and less than 3.5W maximum. Teltonika Networks
For a truly portable attendance kit, it could therefore be integrated with a suitable rechargeable battery/power-management system, but the battery capacity should be calculated together with the attendance terminal’s power requirements.












Reviews
There are no reviews yet.