Danfoss VLT Series Design Manual page 75

VLT ® HVAC Drive Design Guide
3.6.2. General Purpose Input Output Module MCB 101
MCB 101 is used for extension of the number
of digital and analog inputs and outputs of the
VLT HVAC.
Contents: MCB 101 must be fitted into slot B
in the VLT HVAC Drive.
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Galvanic Isolation in the MCB 101
Digital/analog outputs in the MCB 101 are galvanically isolated from other inputs/outputs on the
MCB 101, but not from the ones on 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 the
ones on the control card of the drive.
If digital inputs 7, 8 or 9 are to be switched using the internal 24 V power supply (terminal 9), the
connection between terminal 1 and 5 illustrated in the drawing has to be established.
3.10: Principle Diagram
MCB 101 option module
Extended LCP frame
Terminal cover
MG.11.B4.22 - VLT ® is a registered Danfoss trademark.
3. VLT HVAC Selection
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