The all-in-one Internet-ready remote telemetry unit for automation and monitoring applications offers outstanding functionality from a single compact, rugged unit.

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    Reduce installation costs compared with a SCADA or PLC network

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    Save engineering time without the need for complex programming

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    Real-time access to your data on the move through a standard web browser

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    Machine-to-Machine cellular connections

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    Reduce asset downtime through speedier response

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    Lower maintenance costs

Web Server
  • Web Server
  • Programming
  • Alarms
  • Security
  • Applications

Web server technology

The all-in-one TBox LT2 remote telemetry unit with 3G, 4G or LTE modem options provides real-time remote access and control of your assets, using the latest web server technology. On-board web server technology eliminates the need for complex SCADA software and costly HMI displays.

Web server technology


Servelec’s programming and dynamic analytical tools and libraries significantly reduce development time even for complex multitasking automation requirements. With TWinSoft, an easy-to-use and intuitive configuration tool users can quickly complete their applications and dynamically control communication, alarms, data logging and logic, locally or remotely, in complete security. TWinSoft also includes WebForm Studio which allows users to create dynamic embedded web pages without any coding knowledge.


Alarm management

TBox RTUs use push communications to send multimedia messages to defined groups and devices using escalation and shift management protocols and actions taken are recorded on the TBox’s local memory. At a specific time or following a change of state, a TBox RTU can automatically send messages to multiple recipients with attachments such as complete mobile-friendly reports with live and historical information, alarms and event notifications. Like email, SMS messages can be  transmitted to multiple recipients at a scheduled time or following an event.

Alarm management


All TBox devices and connected assets are protected by a state-of-the-art cyber security suite with authentication, encryption, firewall, SSL/TLS, HTTPS, SMTPS SFTP/FTPS and VPN.



Thousands of TBox LT2 units are in operation across the globe controlling building systems at world-renowned landmarks, monitoring broadcast transmissions to millions of people and monitoring supply levels of essential commodities such as oil, gas and water.

Designation Industrial-grade remote terminal unit (RTU)
Processor 32-bit ARM9, 400MHz
Clock Real-time clock with battery backup

32MB NOR Flash


1MB SRAM with lithium battery backup

Industrial grade SD / μSD card to 32GB (see our price list)

Inputs/Outputs LT2-530 16 digital inputs or outputs (3 DI can be counter inputs)
8 analogue inputs (4-20mA or 0-10Vdc)
Inputs/Outputs LT2-532 Adds 2 analogue outputs (4-20mA) to the I/O count above
Inputs/outputs LT2-540 16 digital inputs or outputs (3 DI can be counter inputs)
6 analogue inputs (4-20mA or 0-10Vdc)
2 temperature inputs (Pt1000)
Inputs/outputs LT2-542 Adds 2 analogue outputs (4-20mA) to the I/O count above
Inputs/outputs LT2-562 24 digital inputs or outputs (3 DI can be counter inputs)
1 analogue inputs (4-20mA or 0-10Vdc)
1 analogue output 4-20 mA
LT2-xxx-4W 12 LTE Bands (4G), 7 UMTS/HSPA+ Bands (3G) and 4 GPRS/EDGE Bands (2G)
LT2-xxx-S Full RS232 serial port
Power Supply DC Powered, 9 to 30V DC, solar panel can be used
Card consumption is typically 1.2W 24VDC
Power Backup Embedded battery charger, 13.8VDC temperature compensated
For sealed lead acid batteries only; recommended model: 7AH, nom. 12V DC
Connectors Spring-cage terminal blocks for power, I/O, RS-232 and RS-485
Operating System Linux Kernel (with real-time extensions)


Programming Via TWinSoft Suite (including WebForm Studio and Report Studio)
Languages Ladder logic, Basic & Function blocks (IEC 61131-3) and optional C/C++ add-ons
Alarm handling Via TWinSoft suite (including WebForm Studio
and Report Studio)
Languages Smart alarm management with embedded calendar
Data Logging Smart data logging: Sampling tables (periodic) + digital & analogue chronologies (event)
SCADA Compatible TView, InTouch, iFix, WIZCON, CITECT, Topkapi, Cube, Labview, Panorama, Scope-X
Remote Upload Up to firmware level
IT Features HTTP, FTP, SMTP & POP3, SNMP, IP forwarding, DynDNS, NTP
Protocol support Support for over 40 protocols, including Modbus (master/slave, RTU/TCP/ASCII), DNP 3.0,
!EC 60870-5, OPC UA, MQTT, Siemens ISO-TCP, Allen Bradley DF1, EtherNet/IP, IEC 61850
and many more
Security 4 levels of authority, HTTP login, SSL/TLS, X.509 Certificates, IEEE802.1x
“IP Security” with: Firewall, HTTP log-in, HTTPS, SFTP, FTPS, SMTPS, VPN, SSH
Size 150mm (H)x 83mm (D)x 29mm (W) / 5.91” x 3.27” x 1.4”
Weight 300gr /10.6oz
Temperature Storage: -40°C to +80°C / -40°F to 176°F
Working: -40°C to +70°C / -40°F to +158°F
Humidity 0-95% non-condensing
Material Proprietary aluminum enclosure, Alodine coating for corrosion
Approvals CE, UL/CSA, FCC, RCM, RED, Class I Div 2, IEC 60068-2/6/27/31/64
MTBF >1,000,000 hours, statement available upon request
Instant alarm notification Yes
Datalogging Yes
Pre programmed Yes
Trace log Yes
Reports Yes


Where to buy

Enter your location to find your nearest distributor for the TBox LT2 RTU


M2M software application that provides a simple and secure remote connection between your TBox Remote Telemetry Unit and your PC.

View TConnect

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