The Altivar 71 drive features a Power Removal safety function that is designed to
ensure motor stopping and prevent accidental restarts. This safety function means
that the drive can be installed as part of the safety system for an Electrical/Electronic/
Programmable Electronic control system relating to the safety of a machine or
It meets the requirements of category 3 of the ISO 1384 machine safety standard,
SIL 2 of IEC/EN 61508 and standard IEC/EN 61800-5-2 which covers the functional
safety requirements of power drive products.
The Power Removal safety function also enables the Altivar 71 drive to offer
protection for motors installed in explosive atmospheres (ATEX certifi cation).