Connecting
5.3 Equipotential bonding
SIMATIC Rack PC 840 V2
Getting Started, Edition 04/2004, A5E00248069-02
5-5
5.3 Equipotential bonding
A low-impedance earth connection ensures that interference signals generated by external
power supply cables, or signal cables, or by cables to the I/O modules, are safely discharged
to earth.
Equipotential bonding terminal
The equipotential bonding terminal (1) on
the device (large surface, large-area
contact) must be connected with the central
grounding busbar of the cabinet or plant in
which the PC is to be installed. The
minimum conductor cross-section may not
be less than 5 mm
2
.
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