Operating Elements; Schematic Diagram; Figure 6: Fe Spring Contact - WAGO 750-495/040-00 Series Manual

26 Device Description
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3.4

Operating Elements

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The I/O module 750-495/040-00x has no operating elements.
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3.5

Schematic Diagram

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Take additional protective measures for voltages on the N connection that
are dangerous if touched
Voltages up to the nominal input voltage of the I/O module (U
measured directly if it is ensured that no voltage to ground that is dangerous if
touched can exist on the N connection of the I/O module during normal
operation. If this is not ensured, additional protective measures must be taken
(e.g., use of voltage transformers with basic insulation).
Otherwise, touch-proof protection from the system may no longer be given in the
event of a fault. This can cause electric shock or burns.
The 3 voltage measuring paths are not electrically isolated from the
4 current measuring paths
The N connection represents the device-internal reference potential for all
electrical measurements.
Additional unintended potential differences between the N connection and the
current connections can lead to incorrect measured values and the destruction of
the I/O module.
The current connections must not be grounded.
Functional ground – FE
To discharge interference, the N connection must be connected to the DIN-rail
via a 2 nF capacitor and a spring contact. To achieve functional grounding, the
DIN-rail must be grounded.

Figure 6: FE Spring Contact

Manual
Version 1.2.0
750-495/040-00x 3-Phase Power Measurement Module 690 V
WAGO-I/O-SYSTEM 750 XTR
/U ) can be
LN LL