Operating instructions

Operating Instructions (Compact)
1.6 Connecting
SIMATIC Panel PC 877
1-18 Operating Instructions (Compact), Edition 07/2006, A5E00877751-01
1.6.4 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 on the right-hand side of the
computer unit and is identified by the following symbol:
Figure 1-4 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
.
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