APPLICATION WARNINGS
IMPROPER INPUT CONNECTIONS
•
To ensure the highest level of safety, always connect the two redundant safety device outputs individually to the
safety relay inputs A1(+)/A2(-) and A3(+)/A4(-) of the FF-SRE6029 Extension Module.
•
When safety devices with relay outputs are used, always connect them using different potentials to A1(+)/A2(-) and
A3(+)/A4(-), in order to be able to detect cross-faults.
CONTACT WELDING
Always protect all safety contacts with correctly rated fuses. These fuse ratings must never exceed the max. safety
output switching currents of the FF-SRE6029 to prevent contact welding (see specifications page 2).
IMPROPER EXTENSION MODULE MONITORING
•
Only connect the FF-SRE6029 extension module to safety devices offering the External Device Monitoring (EDM)
capabilities (e.g. FF-SYB, FF-SB, FF-LS safety light curtains, FF-SM safety mats, FF-SRS emergency stop
modules).
•
Do NOT connect the FF-SRE6029 extension module to safety devices WITHOUT the EDM function (e.g. FF-SYA,
FF-SG, FF-SLG or FF-SLG30).
•
The External Device Monitoring (EDM) function checks the correct operation of the internal relays before each
FF-SRE6029 activation and is able to detect failures of the internal relays (e.g. welded safety relay contacts).
•
ALWAYS connect the normally closed contact (Y1/Y2) of the extension module to the External Device Monitoring
(EDM) loop of the connected safety device. NEVER use the normally closed contact (51/52) for the EDM.
•
If the FF-SRE6029 is not activated often, the customer should perform additional test procedures of the safety
components. This testing may be done every day by removing the power from the FF-SRE6029 at machine power
up.
IMPROPER ARC SUPPRESSOR INSTALLATION
•
NEVER install an arc suppressor across the safety output contacts of the extension module.
•
ALWAYS install arc suppressors across the coils of external safety relays.
Failure to comply with these instructions could result in death or serious injury.
107137-20 -EN FR26 GLO 305 Printed in Germany
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