Equipotential Bonding - Siemens SIMATIC PC 847B Operating Instructions Manual

Connecting

6.3 Equipotential bonding

Secure the power plug
You can secure the power plug in order to avoid unintentional disconnection of the power
cord.
Steps for securing the power plug
1
2
If the power plug is secured with a clamp, the power outlet must be freely accessible to
allow the device to be easily removed from the mains.
6.3 Equipotential bonding
A low-impedance ground connection improves the discharge of interference generated by
external power cables, signal cables or cables for I/O modules to ground.
Equipotential bonding terminal
The equipotential bonding terminal (1) on the device
(large surface, large-area contact) must be
interconnected with the central grounding busbar of
the cabinet or plant in which the PC is to be installed.
The minimum conductor cross-section may not be
less than 5 mm
34
Remove the lower left mounting screw (2) on
the power supply module.
Screw the power plug interlock (1) onto the
power supply module
WARNING
.
2
SIMATIC Rack PC 847B
Operating Instructions, 06/2008, A5E02203168-01