The VW3A3403 is an encoder interface card with open collector outputs, designed for 12 VDC operation. It fits into the option slot of Schneider Electric Altivar drives, translating encoder pulses into speed or position feedback the drive can use for closed-loop control.
Compliance note
The VW3A3403 carries a California Proposition 65 listing. That is a state-level warning requirement for products sold in California that may expose users to listed chemicals. It does not affect function or fit in the drive slot; it is a regulatory label the manufacturer applies to this card.