Configuration and Connection Examples 12.2010
6SE7087-6QX70 (Version AM) Siemens AG
2-34 Compendium Motion Control SIMOVERT MASTERDRIVES
♦ 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.
Requirements for
operating the drive
Opening the
protective door
Closing the
protective cover
Emergency Stop
actuation
Observations
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