Danfoss VLT HVAC Drive FC 100 Series Design Manual page 52

3. VLT HVAC Drive Selection
3.1.2. 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 frequency converter.
Contents: MCB 101 must be fitted into slot B in the frequency converter.
• MCB 101 option module
3 • Extended LCP frame
• Terminal cover
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 frequency converter. 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 frequency
converter.
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 established.
Illustration 3.1: Principle Diagram
52
MG.11.B7.02 - VLT ® is a registered Danfoss trademark
®
VLT HVAC Drive Design Guide