Mounting and connecting the device
3.3 Connecting the device
SIMATIC IPC677E
Operating Instructions, 04/2019, A5E45117996-AA
47
3.3.2 Connection of equipotential-bonding cable
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 connection for functional earthing on a device has a large surface, makes contact over a
large area and is marked with the following symbol:
Requirements
For the equipotential bonding connection, you require:
● A T20 screwdriver
● An equipotential bonding cable with a minimum cross-section of 2.5 mm
2
Procedure
1. Connect the marked equipotential bonding connection (M4 thread) of the device with the
equipotential bonding cable.
Make sure the equipotential bonding cable has contact with the enclosure over a large
area.
2. Connect the equipotential bonding cable with the central grounding point of the control
cabinet.
Make sure the equipotential bonding cable has contact with the central grounding point
over a large area.
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