Equipotential Bonding - Siemens SIMATIC Series Getting Started

Connection

5.3 Equipotential bonding

Connecting to the redundant power supply
Steps for connecting the device to mains (redundant power supply)
1
2
5.3 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
(large surface, large-area contact) must be
connected 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
28
Connect the two connectors for cooling
①
devices
Switch both On/Off switches on or off
simultaneously. The LED at the power
③
supply lights up green.
Note:
If only one control supply module is switched
on or connected, or a module is defective, a
warning signal is emitted. You cancel the
warning signal by pressing button
.
2
④
.
①
on the device
SIMATIC IPC847C
Getting Started, 12/2010, A5E02669190-02