Honeywell SYA14 Series Manual page 719

FF-SRS5939 Series
APPLICATION WARNINGS
IMPROPER INPUT CONNECTIONS
• The FF-SRS5939 interface control module is designed
protective equipment using fail-safe solid state outputs. These equipment perform cross-fault detection
between their outputs. The FF-SRS5939 module does not perform the cross-fault detection between its
inputs. To ensure the highest safety category, do NOT use the FF-SRS5939 with any other equipment. For
electrosensitive protective equipment equiped with relay outputs, use the FF-SRS5935 or FF-SRS5925
dual channel emergency stop module, and for the electromechanical
SRD5985 door monitoring module. These three modules perform the cross-fault detection between their
inputs.
IMPROPER EMERGENCY STOP CONNECTION
• To ensure the highest level of safety, connect the two fail-safe solid state outputs of a single safety device
onto the two input channels of the FF-SRS5939 safety module.
IMPROPER AUTOMATIC START MODE IN PERIMETER GUARDING APPLICATIONS
• If the module is in the automatic start mode, another part of the safety control circuitry must keep the
latched function engaged.
IMPROPER PUSH BUTTON USE (MANUAL START MODE)
• To ensure maximum safety when using an external start push button, always design the circuitry for
manual start mode (see Mode Setting, page 4).
• 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 solutions, the operator should not be able to reach manual start from the danger
zone.
• A Programmable Logic Controller (PLC) 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-
SRS5939 safety output capability to prevent contact welding.
IMPROPER EXTERNAL SAFETY RELAY MONITORING
• When using additional safety relays or the FF-SRE Extension module, always connect one normally closed
contact of each relay in series inside the FSDs monitoring loop circuit (Y1/Y2). This connection will ensure
correct operation of the external relays after each FF-SRS5939 activation.
• If the FF-SRS5939 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 using the safety
device test input 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 CATEGORY
• Other safety components with relay outputs can be connected in series with the electrosensitive protective
equipment fail safe solid state outputs on both inputs of the FF-SRS5939 control module. Parallel wiring of
multiple outputs into a single channel can defeat the channel and cause an unsafe condition.
• A permanent short-circuit of one equipment relay output will be detected after the actuation of the
corresponding equipment, but this fault condition may be cancelled by the actuation of a another
equipment connected in series. In any case, the above mentioned short-circuit will be detected again after
a new actuation of the first equipment (see M
check all of the safety devices connected to a FF-SRS5939 control module to ensure proper operation.
IMPROPER EMERGENCY STOP PUSH BUTTON
• The Emergency Stop push button must be designed according to the EN 418 safety standards (or US
standard). Under any condition, the Emergency Stop switch must be able to open its contacts when
activated.
IMPROPER USE OF THE RELAY OUTPUT CONTACTS
• Always connect two contacts out of the three contacts delivered by the FF-SRS5939 to the machine
control circuitry (see
Failure to comply with these instructions could result in death or serious injury.
6
ODULE INPUTS
, page 8) .
APPLICATION EXAMPLES
to be used with Honeywell electrosensitive
safety switches, use the FF-
S12/S22 on page 5). Individually activate and
107033-12 EN FR26 GLO 0499 Printed in Germany
PK107033-EN