Siemens Simovert Masterdrives Compendium page 72

Configuration and Connection Examples
Emergency Stop
actuation
Observations
2-44
♦ The instantaneous output (14) of the safety switching device –A1 is
disabled and the cascading input (1) of –A2 thus deactivated. The
response of –A2 is identical to that when the protective door is
opened.
♦ When the timer on –A2 runs down, the time-delayed output (28)
switches the cascading input (1) of –A3 to low level.
♦ The instantaneous output (14) of –A3 de-energizes the safety relay
–K1. (Pulse suppression in the drive and thus interruption of energy
supply to the motor.)
♦ The time-delayed output (28) of –A1 de-energizes the line contactor
after the set delay period.
This behavior is identical to Stop Category 0 in accordance with
EN 60204-1:2006 /R9/.
♦ The drive must be brought to a standstill within the delay period set
on –A2. Pulse suppression before the drive has reached standstill
causes the motor to coast down.
♦ The time on –A3 must be set as short as possible, but in such a way
that –K3 picks up before –K4 drops out in order to prevent line
contactor –K2 from dropping out.
♦ The delay time on –A1 must be set identically to the delay time on
–A2.
6SE7087-6QX70 (Version AM)
Compendium Motion Control
12.2010
Siemens AG
SIMOVERT MASTERDRIVES