Safety Integrated - Industry - Siemens

Behavior when the protective doors are opened
When the protective doors are opened, it is initiated that the
drive is shut down according to stop Category 1 in compliance
with EN 60204-1. It must be ensured that potentially hazardous
motion must have come to a standstill before a person can
reach the potentially hazardous area!
■ A 0 signal is entered at contact 65 (controller enable) of the
drive via the enable contacts of safety combination A1. The
drive is immediately braked down to 0 speed and the pulses
are cancelled. The delay time of safety combination A1 is
simultaneously started and the drive must have come to a
standstill before it expires.
Powering-up the drive
The drive can be restarted (powered-up again) when the protective
doors are closed.
■ When button S1 ("On") is pressed, safety combination A1 is
brought into the operational state. The internal line contactor
of the rectifier unit and the internal safety relay are
energized. The drive restarts.
■ The safely delayed enable contacts of safety combination
A1 open after the selected delay time has expired. This
means that the internal safety relay of the drive (1st shutdown
path!) and the internal line contactor of the rectifier
unit (2nd shutdown path!) are no longer energized.
■ If the internal safety relay or the internal line contactor of
the rectifier unit have not dropped-out because of incorrect
behavior (e.g. fault), then their checkback signal contacts
in the on circuit of the safety combination A1 are not
closed. The safety combination cannot be switched-in.
Functional Example No. MC-FE-I-002-V11-EN 417
Ex. No.
2.3