The VW3AP1502 is a factory-fitted emergency stop push-button for the Altivar Process ATV600 and ATV900 compact drive systems. It provides a SIL 3 stop category 0 function — meaning the drive removes power immediately when the mushroom head is pressed, no controlled deceleration. This is the same stop category used in safety circuits that need to bring a hazard to zero energy without delay. The part consists of a single mushroom-head emergency stop push-button mounted on a dedicated bracket that integrates into the drive's standard enclosure. It cannot be ordered alone — the evidence states it is only possible in combination with a standard enclosure, so this is a line-item for a drive system build, not a standalone field retrofit.
Integration note
The mushroom head push-button is pre-wired to the drive's safety input circuit. No additional safety relay or interface module is needed for SIL 3 stop category 0 — the drive's internal safety logic handles the signal. Verify the button's normally-closed contact pair is wired into the drive's safe-torque-off (STO) loop per the ATV600/ATV900 installation manual.