Honeywell SYA14 Series Manual page 677

APPLICATION WARNINGS
IMPROPER INPUT CONNECTIONS
• Because the FF-SRS5934 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
• 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 solution, 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-SRS5934
safety output capability to prevent contact welding.
IMPROPER EXTERNAL SAFETY RELAY MONITORING
• When using additional safety relays, always connect one normally closed contact of each relay in series inside the
Final Switching Device (FSD) monitoring loop circuit (Y1/Y2). This connection will ensure correct operation of the
external relays after each FF-SRS5934 activation.
• If the FF-SRS5934 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-SRS5934 at machine power up every day.
IMPROPER ARC SUPPRESSOR INSTALLATION
• NEVER install an arc suppresser across the safety output contact of the safety control module.
• ALWAYS install arc suppressers 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-SRS5934 control module. To ensure maximum safety, always use safety devices. Keep in mind
that this type of installation will degrade the overall safety level of the solution.
IMPROPER EMERGENCY STOP PUSH BUTTON
• The Emergency Stop push button must be designed according to safety standards (US and European). Under any
condition, the Emergency Stop switch must be able to open its contacts when activated.
IMPROPER MANUAL START OPERATION MODE
• The proper operation of an external start push button is not monitored by the FF-SRS5934. If the push button is held
closed, or fails in a closed position, the FF-SRS5934 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-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.
107016-11 EN FR26 GLO 1199 Printed in Germany 5