
(ground), for example with a cable clamp or a conductive
cable gland. It may be necessary to apply potential-
equalizing cables to maintain the same earth (ground)
potential throughout the network. Particularly in instal-
lations with long cables.
To prevent impedance mismatch, always use the same
type of cable throughout the entire network. When
connecting a motor to the frequency converter, always use
screened motor cable.
Cable
Screened twisted pair (STP)
Impedance
120
Ω
Max. cable length
1200 m (including drop lines)
500 m station-to-station
Table 2.9
Installation
VLT® Automation VT Drive FC 322 D-Frame Instruction Manual
2-14
MG21E122 - VLT® is a registered Danfoss trademark
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