Honeywell SYA14 Series Manual page 598

- Machine shutdown
The SSD static output must be connected to a relay with guided contact K3 (called
" Secondary Switching Device " - SSD) to be used in the machine stopping circuitry.
Correct operation of the SSD output is tested at each power on through the " SSD
MONITOR " input and a Normally Open contact of the SSD relay must be connected
to the terminal 31. The terminal 32 must be connected to the +24Vdc to energize the
relay K3 or the alarm lamp through the SSD output.
IMPROPER EXTERNAL SAFETY RELAYS PERFORMANCE
•
Use one stop circuit safety relay K3 with mechanically linked contacts (such as GE
CR120 BP Machine Tool Relay or Telemecanique CA3-KN31BD3 or CA3-DN31BD relay)
to reliably detect a welded contact.
•
Always use the SSD monitoring loop to check correct operation of relays K3.
Failure to comply with these instructions could result in death or serious injury
TIMING CONDITIONS
The closing response time of the SSD relay shall be less than 140 ms.
•
It is recommended to connect varistors in parallel with the SSD relay coil.
•
Use of a RC circuit would prevent the module from operating.
IMPROPER PROTECTION INSTALLATION
•
Never install varistor across the safety output of the muting module.
•
Always install varistors across the coils of the external safety relays.
Failure to comply with these instructions could result in death or serious injury.
64 107004-15 EN FR26 ROW 0899 Printed in France