22 Device Description WAGO-I/O-SYSTEM 750750-494 3-Phase Power Measurement ModuleManualVersion 1.2.0Function Earth FE!In order to get a function earth, the connectors N and IN are connected to themounting rail via a 470 pF capacitor and a spring contact. If the rail is correctlyconnected to PE, the immunity to interference is increased.Figure 6: FE Spring ContactN and IN are shorted!The connections N and IN are firmly shorted and form the internal reference forall electrical measurements.Pos : 46 /D okumentation allgemei n/Glieder ungs elemente/---Seitenwechs el--- @ 3\mod_1221108045078_0.doc x @ 21810 @ @ 1