Before PROFIsafe, drive safety meant removing power from the drive. And if coasting was a hazard, adding an external brake. Sadly, that may not have been the safest action to take. It may be safer to maintain a certain torque level to hold a web in position, for example. Or it may be safer to move the shaft so the machine goes to a safe position. Now, these safety states and others can be achieved. To discover these other drive safety states, watch our Drive Safety webcast.
Removing power from a drive is expensive and it’s hard on the drive (potentially shortening its life). It’s expensive because two contactors are required to disconnect the AC lines. PROFIsafe and drive safety provide the benefits of additional safety actions, decreased wiring, reduced installation time, and shortened commissioning. Troubleshooting is simplified and downtime reduced due to the extensive diagnostics provided.