Illustration 3.10: Principle Diagram - Danfoss VLT Series Design Manual

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VLT HVAC Drive Design Guide 3. VLT HVAC Selection
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Galvanic Isolation in the MCB 101
Digital/analog inputs are galvanically isolated from other inputs/outputs on the MCB 101 and in
the control card of the drive. Digital/analog outputs in the MCB 101 are galvanically isolated from
other inputs/outputs on the MCB 101, but not from these on the control card of the drive.
If the digital inputs 7, 8 or 9 are to be switched by use of the internal 24 V power supply (terminal
9) the connection between terminal 1 and 5 which is illustrated in the drawing has to be estab-
lished.

Illustration 3.10: Principle Diagram

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MG.11.B2.02 - VLT is a registered Danfoss trademark