Installing and connecting the device
3.3 Connecting the device
Operating Instructions, 01/2021, A5E43920357-AA
59
3.3.2 Connection of equipotential bonding line
A low-impedance earth connection ensures that interference signals generated by external
power supply cables, signal cables or other cables to the I/O devices are safely discharged to
earth.
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.
You can find information on the position of the functional earthing connection under "Rear of
the device (Page 23)".
Requirement
• T20 screwdriver
• Equipotential bonding conductor with a minimum cross section of 2.5 mm
2
Procedure
1. Make the connection for functional ground via an equipotential bonding line to the
equipotential bonding rail or grounding bar of the control cabinet in which the device is
installed.
3.3.3 Connecting the power supply
3.3.3.1 Connect single power supply (AC)
Injury to persons or damage to property when operated on an incorrect power supply
system
If you connect the device to an unsuitable power supply, the device receives voltages and
currents that are too high or too low.
Injuries to persons, malfunctions or a damage to the device can result.
• The permissible rated voltage of the device must match the local supply voltage.
• Operate the device only in grounded power supply networks (TN networks in accordance
with VDE 0100 Part 100 or IEC 60364-1).
• Operation via non-grounded or impedance-earthed networks is prohibited.
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