IIoT telemetry module
VADTel-IIoTU3
Cellular telemetry module for gas volume correctors in hazardous areas — powers the corrector's RS-485 line and sends its readings to the Data Platform.
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Built for hazardous areas
Connects to gas volume correctors installed in hazardous areas through an intrinsically safe Ex ib RS-485 interface (Ex version).
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Powers the corrector line
Acts as an additional power source for the gas volume corrector and its RS-485 interface.
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Cellular-first
Reports to the Data Platform over GSM, GPRS, LTE-M or NB-IoT, with GSM 850–1900 MHz and LTE-M B1/B3/B8/B20 bands.
VADTel-IIoTU3 is the externally powered (24 V DC) telemetry module of the VADTel family for gas volume correctors. It reads the corrector over RS-485 — in the Ex version through an intrinsically safe Ex ib interface — and forwards the readings to the Data Platform over cellular networks.
Beyond gas volume correctors, the module provides remote telemetry for heat calculators and water meters. For metering nodes without an external power supply, the battery-powered VADTel-AIIoTU8 covers the same role.
Full documentation — product passport, commissioning and GSM antenna installation — is available on the IoT documentation portal.
| Connectivity | |
|---|---|
| Cellular | GSM / GPRS / LTE-M / NB-IoT |
| GSM bands | 850 / 900 / 1800 / 1900 MHz |
| LTE-M bands | B1 / B3 / B8 / B20 |
| Interfaces | |
| RS-485 | Intrinsically safe Ex ib interface (Ex version) |
| Ex ib output parameters | Uo 10.5 V · Io 40 mA · Po 0.5 W · Co < 0.4 µF · Lo < 1 mH |
| Corrector supply | Additional power source for the gas volume corrector and its RS-485 interface |
| Power | |
| Power supply | 24 V DC |
| Environment & mechanics | |
| Enclosure rating | IP54 (IEC 60529) · IK07 (EN 62262) |
| Operating temperature | −40 °C to +60 °C |
| Dimensions | 161 × 101 × 60 mm |
| Weight | ≤ 0.5 kg |
| Compliance & service | |
| CE marking | Manufacturer's EU Declaration of Conformity (RED, EMC, RoHS) |
| Service life | ≥ 5 (10) years |
| Warranty | 24 months from the date of purchase |
Full product documentation
Open the product passport, technical specifications, EU declaration of conformity, RoHS declaration, and test reports on our documentation portal.