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 and powering-down the drive
The drive can be started or stopped when the protective doors
are closed.
■ When the internal safety relay and the internal line contactor
of the rectifier unit are in the correct state, safety combination
A1 is brought into an operational state.
■ The internal line contactor of the rectifier unit and the
internal safety relay of the drive are energized.
■ When pressing S2 ("On"), contactor K1 is energized and
latches. A 1 signal is entered at contact 65 (controller
enable) of the drive and the drive starts.
■ 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 contactors of
the rectifier unit have not dropped-out because of incorrect
behavior (e.g. fault), then their checkback signal contacts
AS1/2 in the on circuit of the safety combination A1 are not
closed. The safety combination cannot be switched-in.
■ When button S1 ("Off") is pressed, contactor K1 is no longer
energized and a 0 signal is entered at contact 65 (controller
enable) of the drive. The drive is immediately braked down
to 0 speed and the pulses are cancelled. If the protective
doors are opened, 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.
Functional Example No. MC-FE-I-002-V11-EN 419
Ex. No.
2.4