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4.2
Operation on a grounded power supply
Definition: Grounded–Neutral Supply
In a grounded power supply system, the neutral conductor of the mains is bonded
to earth. A short of the live conductor to ground or to chassis ground of the system
trips the protective devices.
Components and Protective Measures
Regulations prescribe various system components and compulsory protective
measures for the installation of a plant. The type of components and compulsory
protective measures depends on which DIN VDE regulation applies to your system
installation.
S Master switch (see Figure 3,
S Isolating link (see Figure 3,
RS 485-IS Coupler on Grounded–Neutral Power Supply
Figure 3 shows the position of the RS 485-IS Coupler in a system connected to a
TN-S power network. When the RS 485-IS Coupler is connected to grounded
reference potential, all parasitic currents are discharged to ground via the
grounding conductor.
Product Information RS 485-IS Coupler (6ES7 972-0AC80-0XA0)
A5E00207628-02
): DIN VDE 0100 Part 460
): DIN VDE 0113 part 1
9
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