Electrical Installation, Control Cables - Danfoss VLT Decentral FCD 300 Operating Instructions Manual

2 Installation

2.5.13 Electrical Installation, Control Cables

Control cables must be screened/armoured. The screen must be connected to the frequency converter chassis by means of a clamp. Normally, the screen
must also be connected to the chassis of the controlling unit (use the instructions for the unit in question). In connection with very long control cables
and analogue signals, in rare cases depending on the installation, 50/60 Hz earth loops may occur because of noise transmitted from mains supply cables.
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In this connection, it may be necessary to break the screen and possibly insert a 100 nF capacitor between the screen and the chassis.
Switches S101-104
Bus line coils, leave switches ON
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MG.04.B8.02 - VLT is a registered Danfoss trademark
VLT® Decentral FCD