Connecting
6.3 Protective ground connection
SIMATIC IPC427C
Operating Instructions, 04/2009, A5E02414743-01
35
6.3 Protective ground connection
The PE terminal (M4 thread) on the device (large surface, large-area contact) must be
connected to the PE conductor on the cabinet or system in which the PC is to be installed.
The conductor cross-section must not be less than 2.5 mm
2
.
The PE terminal is needed to protect the device and ensures that interference signals
generated by external power cables, signal cables or cables to the I/O modules are safely
discharged to earth.
Required tool for protective earth terminal: TORX T20 screwdriver
Protective earth terminal
Connect the PE terminal (M4 thread)
① on the device to the PE conductor
on the cabinet or system in which the
PC will be installed. The minimum
conductor cross-section may not be
less than 2,5 mm
2
.
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