Video: How do the ATV31/ATV312 logic inputs work when the VFD is in SINK mode?

Resolution:
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.

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