Siemens Simovert Masterdrives Compendium page 62

Configuration and Connection Examples
Requirements for
operating the drive
Opening the
protective door
Closing the
protective cover
Emergency Stop
actuation
Observations
2-34
♦ Emergency Stop is canceled and the safety switching device –A1 is
reset.
♦ Protective door is closed (position switch contacts –S4 and –S5 are
closed).
♦ Safety switching device –A2 is started automatically.
♦ Safety relay –K1 is energized via the instantaneous output (14) of
the safety switching device –A2.
♦ Line contactor –K2 is energized via the time-delayed output (48) of
the safety switching device –A2. The DC link of the drive is charged.
♦ Emergency Stop is canceled and the safety switching device –A1 is
reset.
♦ When the protective door is opened, the position switch contacts
–S4 and –S5 are opened.
♦ The instantaneous contact (13/14) of –A2 de-energizes the safety
relay –K1. (Pulse suppression in the drive and thus interruption of
energy supply to the motor.)
♦ The positively driven NC contact of –K1 energizes the contactor
relay –K3.
♦ When the timer set in –A2 runs down, the time-delayed contact
(47/48) opens. The line contactor –K2 is energized by –K3.
♦ –K1 and –K2 are automatically and directly energized again.
♦ The contacts of the safety switching device –A1 are opened.
♦ The safety relay –K1 and the line contactor –K2 are de-energized
irrespective of the state of the safety switching device –A2. (Both
channels –K1 and –K2 drop out and the motor is separated in two
channels from the torque-producing power supply.)
This behavior is identical to Stop Category 0 in accordance with
EN 60204-1:2006 /R9/.
♦ Pulse suppression before the drive has reached standstill causes
the motor to coast down. Vertical axes must be secured by holding
brakes or similar.
♦ The time on –A2 must be set as short as possible, but in such a way
that –K3 picks up before –A2 drops out in order to prevent line
contactor –K2 from dropping out.
6SE7087-6QX70 (Version AM)
Compendium Motion Control
12.2010
Siemens AG
SIMOVERT MASTERDRIVES