The VW3AE2201 is a relay output card for Schneider Altivar 71 Plus-LH and Altivar 61 Plus drives — a relay for logic output, not a power contactor. It sits as an I/O extension in the drive's accessory slot, drawing its buffer voltage from the 24 V DC backplane. If you're maintaining a line with these Altivar Plus cabinets, this is the card that gives you a dry contact from a logic-level signal.
What the 24 V DC buffer condition means
The 'buffer voltage 24 V DC' condition means the relay coil and logic interface are powered from the drive's internal 24 V supply, not an external source. The card is a basic I/O extension — it gives you one relay output (OC, open-collector style) that switches a dry contact. No fieldbus, no analog. If your application needs a simple 'drive running' or 'fault' signal back to a PLC, this card does it. If you need isolated analog or encoder feedback, you're looking at a different slot card.