The WAGO I/O System 750 can also be used in marine applications and onshore/offshore installations (e.g., platforms, loading facilities). This is possible via certification under the standards of leading agencies such as Germanischer Lloyd and Lloyd's Register. This filter module ensures proper (certified) system operation. The module protects against high-energy disturbances on DC supply lines due to switching overvoltages caused by inductive loads. It contains a filter for the system supply and transient protection for both system and field supply. It is streamlined for use in systems with insulation monitoring and also offers the possibility of a ground fault test. Indicators: • LED (green): Power supply is available • LED (red): Ground fault Ground fault diagnostics (response values): Pre-alarm 50 kΩ (±15 %) Main alarm 25 kΩ (±15 %) Hysteresis (typ.) 25 … 30 % Response time ≤ 5 s (typ. 2.5 s) Internal resistance DC (test circuit) >10 MΩ (test inactive), >90 kΩ (test active) Test current ≤180 μA (RF=0 Ω) Permissible system leakage capacitance ≤ 2 μF
