22 July 2022
Programming and wiring logic inputs in SINK mode on Altivar 312 or Altivar 31 (ATV312/ATV31) Variable Frequency Drives (VFD).Product Line:
ATV31 and ATV312Environment:
Developing control schemeResolution:
The VFD is in sink mode when the control board DIP switch is in the SINK position.
Internally, the sinking mode connects the logic inputs to the +24V as the common. A logic input is turned on by connecting it to the COM by means of a dry contact.
Note: When the logic inputs are configured for sink logic, grounding an input signal can result in unintended activation of drive controller functions.