Figure 6: Fe Spring Contact; 3-Phase Power Measurement Module - WAGO 750-494 Series Manual

22 Device Description
Function Earth FE!
In order to get a function earth, the connectors N and IN are connected to the
mounting rail via a 470 pF capacitor and a spring contact. If the rail is correctly
connected to PE, the immunity to interference is increased.

Figure 6: FE Spring Contact

N and IN are shorted!
The connections N and IN are firmly shorted and form the internal reference for
all electrical measurements.
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WAGO-I/O-SYSTEM 750

750-494 3-Phase Power Measurement Module

Manual
Version 1.2.0