Honeywell SYA14 Series Manual page 668

APPLICATION WARNINGS
IMPROPER INPUT CONNECTIONS
• Because the FF-SRS5924 is a single channel device and relies on a single safety input, avoid any short
circuit possibilities on this channel. Precautions include using conduit and protecting the terminal strips
inside the machine cabinets.
• Use the FF-SRS5925, FF-SRS5935 or FF-SRS5988 dual channel safety control module if a single safety
input solution does not provide the level of safety required.
IMPROPER AUTOMATIC OPERATION MODE IN PERIMETER GUARDING APPLICATIONS
• If the module is in the automatic operation mode, another part of the safety control circuitry must keep the
latched function engaged.
IMPROPER PUSH BUTTON USE
• Ensure the location of the manual start function is outside of the danger zone and provides the operator
with a clear view of the zone.
• For perimeter guarding applications, the operator should not be able to reach manual start from the danger
zone.
• A Programmable Logic Controller must NOT be able to override a manual start function.
CONTACT WELDING
• Always protect all safety contacts with correctly rated fuses. These fuses must never exceed the rated FF-
SRS5924 safety output capability to prevent contact welding.
IMPROPER EXTERNAL SAFETY RELAYS/CONTACTORS MONITORING
• When using additional safety relays/contactors, always connect one normally closed contact of each relay
in series inside the Restart loop circuit (S33/S34). This connection will ensure correct operation of the
external relays/contactors after each FF-SRS5924 activation.
• If the FF-SRS5924 is not activated often, the customer is responsible for accomplishing any additional test
procedures of the external safety components. For instance, this testing can be done by removing the
power from the FF-SRS5924 at machine power up every day.
IMPROPER ARC SUPPRESSOR INSTALLATION
• NEVER install an arc suppressor across the safety output contact of the safety control module.
• ALWAYS install arc suppressors across the coils of external safety relays.
IMPROPER SYSTEM SAFETY LEVEL
• Multiple machine locations and/or applications can be protected by using several safety components (more
than 2) connected to one FF-SRS5924 control module. Keep in mind that this type of installation will
degrade the overall safety level of the solution. To ensure maximum safety, always use safety devices.
IMPROPER EMERGENCY STOP PUSH BUTTON
• The Emergency Stop push button must be designed according to the European (EN 418) and US safety
standards (NFPA 19). Under any condition, the Emergency Stop switch must be able to open its contacts
when activated.
IMPROPER MANUAL START MODE
• The proper operation of an external start push button is not monitored by the FF-SRS5924. If the push
button is held closed, or fails in a closed position, the FF-SRS5924 module will operate in an automatic
start mode. The customer is responsible for ensuring that this automatic start mode does not lead to an
unsafe condition. Use the FF-SRS5925, FF-SRS5935 or FF-SRS5988 dual channel safety control module
if the external start push button must be monitored to provide the desired level of safety.
Failure to comply with these instructions could result in death or serious injury.
107015-10 EN FR26 GLO 1198 Printed in Germany 5