3.24 Main Menu - Analog I/O Option MCB 109 - Group 26
3.24.1 Analog I/O Option MCB 109, 26-**
The Analog I/O Option MCB 109 extends the functionality of VLT HVAC Drive adjustable frequency drives, by adding a number of additional, programmable
analog inputs and outputs. This could be especially useful in building management system installations where the adjustable frequency drive may be
used as de-central I/O, obviating the need for an outstation and thus reducing costs.
Consider the diagram:
This shows a typical Air Handling Unit (AHU). As can be seen, the addition of the Analog I/O option offers the possibility to control all of the functions
from the adjustable frequency drive, such as inlet, return and exhaust dampers or heating/cooling coils with temperature and pressure measurements
being read by the adjustable frequency drive.
NOTE!
The maximum current for the analog outputs 0–10 V is 1 mA.
3 Parameter Description VLT
®
HVAC Drive Programming Guide
3-250
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
3
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