The HVT 400-DX extends the HVT series to voltages up to 1500 VDC or 1500 VAC. This covers high stack and system voltages in industrial electrolyzers, energy storage systems, transformers and power electronics. The device is certified to SIL 2 according to IEC/EN 61508. Its redundant measuring inputs (12 MΩ per input) monitor each other and detect faults reliably. The measured value is output as 0/4–20 mA and configurable limit relays.