Installation Guidelines S5-115F Manual
Filters for power cables and signal cables
Filtering of power and signal cables is a measure for suppressing conducted interference. Over-
voltages must not occur on power cables within the cabinet.
Suppress overvoltages with the following measures:
• Suppressing interference in power cables
A mains filter (e.g. B84299-K64, 250 V AC/10 A) should be installed in the supply cable in the
case of a mains supply of 230 V. The mains filter must be located at the entrance to the
cabinet. Please note that the filter must have a large surface contact and low-impedance
connection with the cabinet ground (contact surfaces must be uninsulated).
• Noise suppression capacitors for DC supply voltage
If a cabinet is connected to a central 24 V supply, noise can reach the controller via this supply
cable.
You are therefore recommended to install 24 V noise suppression capacitors. These should be
installed at the cabinet ground or on the shielding bar.
Figure 3-39. Arrangement of Suppression Capacitors
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+24 V
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0 V
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e.g. 0.6 µF
B81551-A-B16
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Cabinet ground
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e.g. 0.2 µF
B81111-A-B42
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0.6 µF
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0.2 µF
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0.6 µF
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+24 V
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0 V
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Block diagram
3-48
EWA 4NEB 811 6148-02
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