DIN-Rail DC Current Sensors


WAGO Corporation’s new Feedthrough Current Sensors continuously measure DC currents to optimize photovoltaic (PV) energy production. Via serial connection, the 789-620 (0–80A DC) and 789-621 (0–140A DC) sensors transmit data with an accuracy of 0.5% (full scale value). This can be used to quickly identify defective or damaged PV modules, bolstering performance and reliability.

Equipped with dual RJ-45 interfaces, the sensors transmit data via RS-485 serial communication lines up to 4000 feet. Thirty-two Current Sensors can reside on one line for connection to the WAGO-I/O-SYSTEM or PC as a MODBUS Slave. The 789 Series feedthrough configuration eliminates the need to terminate conductors, simplifying commissioning. Both models are addressable via on-unit DIP switch and feature an operational status LED. Engineered for harsh environments, the sensors operate in temperatures of -20°C to +70°C.

The 789 Series Sensors join WAGO’s solar portfolio, which includes solar tracking for PV and concentrated solar applications via WAGO-I/O-SYSTEM. 828 Series lever-operated, feedthrough terminal blocks serve solar inverters.

WAGO solar applications include 758 Series IPCs managing solar energy for Tûranor PlanetSolar. The catamaran is attempting to be the first solar-powered global circumnavigation via vessel: http://www.planetsolar.org/


  • accuracy of 0.5%
  • can be used to quickly identify defective or damaged PV modules
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