VLT
®
4000 VT
Switch 1 has no function.
Switches 2 and 3 are used for terminating an RS 485
in-terface, serial communication. In the first and the
last VLT AFD, switches 2 and 3 must be ON. In the
other VLT AFD, switches 2 and 3 must be OFF.
Switch 4 is used if an external 24 V DC supply is required
for the control terminals. Switch 4 separates the
common potential for the internal 24 V DC supply from
the common potential of the external 24 V DC supply.
NOTE
Please note that when Switch 4 is in position
"OFF", the external 24 V DC supply is
galvanically isolated from the VLT AFD.
MG.40.A7.22 - VLT is a registered Danfoss trademark
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