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1.5.4
Connecting the equipotential bonding circuit
A low-impedance earth connection ensures that interference signals generated by external
power supply cables, signal cables or cables to the I/O modules are safely discharged to
earth.
The equipotential bonding connection of the device is located underneath the device and is
identified by the following symbol:
Figure 1-4
Connecting the equipotential bonding circuit
You require a TORX T20 screwdriver to connect the equipotential bonding conductor.
Steps for connecting the equipotential bonding
(1)
SIMATIC Panel PC 677
Operating Instructions (Compact), Edition 07/2006, A5E00877730-01
Equipotential bonding
Connect the equipotential bonding connection (M4 thread) (1)
on the device (large surface, large-area contact) with the
central grounding point of the control cabinet.
The minimum permissible cross-section is 5 mm
Operating instructions (compact)
.
2
1.5 Connecting
1-17
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