Moog DS2110, Инструкция по установке и эксплуатации

Страница: 278 / 312

APPENDIX C – RESTART INTERLOCK CIRCUITS C-12
CDS7324 (FORMERLY LSF-0819)
Rev. A INSTALLATION & USER’S MANUAL
Requirements
•
The delayed output of the control module which drives the hardware channels (safety relays) and the PLC
output which drives the SW channel must be set ensuring that the intervention of the safety function should
occur only with the motor at standstill.
•
When personnel are permitted inside the hazardous zone, the restart must be available only after a separate
reset following the closure of the protective guards confirming that no personnel is inside the hazardous zone
•
The door control module must be compliant with at least category 3 of EN 954-1.
See par C.6 for the technical data.
C.7.2 Sequence and Procedure using the RESTART INTERLOCK
The motor must be stopped before the hardware and software channels are inhibited and the Restart Interlock is
activated.
If one of the following faults should occur with the contacts of the “hardware channel verification” opened (0V) and
the protective guards withdrawn, then the EMERGENCY STOP must start immediately:
•
The acknowledgement contacts “Channel 1 verification” remain open after the intervention of the Restart
Interlock.
•
If “Channel 2” is also used: the acknowledgement contacts “Channel 2 verification” remain open after the
intervention of the Restart Interlock.
•
There is a fault in the external control circuit itself.
•
There is a fault in the signal lines of the verification contacts.
All of the drives associated with the machine/plant must be disconnected and isolated from the line supply
through the line contactor.
If the Restart Interlock control has been correctly integrated into the external safety-related control and has been
checked to ensure correct functioning, then the drives in the separate working zone of the machine are protected
against undesirable starting, and personnel can enter or operate in the hazardous zone which has been defined.
WARNING: If a fault occurs on operating the Restart Interlock, then this fault must be removed
before the mechanically isolating protective guards to the working zone of the machine or plant are
opened. After the fault has been removed, this procedure must be repeated for the Restart
Interlock. Under fault conditions, all of the drives, machine and plant must be shut down.
WARNING: The line contactor must have a NC contact linked to safety NO contacts.
CAUTION: Where the equipment requires manual intervention the relevant regulations
must be taken into account.