SIEB & MEYER sinudyn-0360520 Series, Описание аппаратуры

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Safety Circuit / Restart Lock
sinudyn-36 Hardware Description 0360520 77
12.1 Functional Description of the Restart Lock
The restart lock locks the respective drive of a single-axis device. Any other drive
module remains in proper condition.
A double redundant positively driven safety relay has access to the respective control
units of the output stages of the drive to be locked and interrupts the connection.
Thus, no control signals can be passed on to the transistors of the output stages and
the motor is at a secure standstill.
A positively driven n/o contact of the relay (signaling contact restart lock) must be
latched as acknowledgement contact with a higher-ranking fail-safe control system
or signaling unit. The signaling contact of the restart lock must separate the drive
from the mains via the main contactor in the mains supply in the case of a failure of
the restart lock, which means: The restart lock is set, but the signaling contact re-
mains open. Without this additional wiring (redundancy), a safety level SIL 3 accord-
ing to EN 13849-1 cannot be realized.
The relay of the restart lock must only be activated, if
X the drive is at a secure standstill (at least stop category 2),
X the CNC module is deactivated and
X the holding brake of the motor has been arrested.
/
The motor cannot provide a torque when the restart lock is activated.
Non-self-locking drives, as hanging loads, must be blocked with a
mechanical brake.