Connecting
4.3 Connecting the Equipotential Bonding Circuit
SIMATIC Panel PC 577B
Operating Instructions (Compact), 04/2008, A5E02135173-01
21
4.3
Connecting the Equipotential Bonding Circuit
A low-resistance ground connection ensures that interference signals generated by external
power supply cables, signal cables or cables to the I/O modules are safely discharged to
ground.
The equipotential bonding connection of the device is located underneath the device and is
identified by the following symbol:
Figure 4-1
Equipotential Bonding
Connecting the Equipotential Bonding Circuit
You require a TORX T20 screwdriver to connect the equipotential bonding conductor.
Steps for connecting the equipotential bonding
(1) 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
2
.