FF-SRS5939 Series
PK107033-EN
7
107033-12 EN FR26 GLO 0499 Printed in Germany
APPLICATION EXAMPLES
FIG. 12. WIRING DIAGRAM (USING TWO NORMALLY OPEN CONTACTS)
(1) : Always install arc suppressors across the coils of external
safety relays (these arc suppressors are not necessary, if
the FSDs relays K1 & K2 are supplied by the Honeywell
FF-SRE3081 extension module for which correct wiring is
also indicated in this wiring diagram)
(2) : Use a 120/230 Vac electrically insulated push-button
(3) : The module and the ESPE must be connected
to the same 0V
ESPE : Electrosensitive Protective Equipment
FSD : Final switching Device
(A) : Jumpered if the manual restart mode is not
used
(B) : Jumpered if the FSDs K1 and K2 are not used
Restart sequence:
The safety control module will restart a 100 ms after removing the stop condition, or after releasing the
START push button. In the manual restart mode, pressing the START push-button for less than 0.1 s or for
more than 1.5 s will not restart the module (permanent short-circuit detection is performed through this
input). The green relay outputs status indicator will turn ON indicating that the internal relays are energized.
The two normally open safety contacts will close and the normally closed contact will open (this contact can
be used for signalling purpose) allowing the machine to operate.
External contactors:
The output contacts switching capacity can be reinforced by using external contactors (K1 and K2) with
positive-guided contacts. The proper operation of the external contactors is monitored by looping the NC
contacts into the FSDs monitoring loop (terminals Y1/Y2). The module will not restart if the FSD monitoring
loop remains permanently open, or remains closed for more than 250 ms after the closing of the module
normally open contacts. In this case, the internal relays will be briefly energized.
CONTACT REINFORCEMENT VIA EXTERNAL RELAYS
•
If contact reinforcement via external safety relays or the FF-SRE3081 Extension module is necessary,
connect one normally closed contact of each relay K1 and K2 in series into the Restart loop (terminals
Y1/Y2).
IMPROPER EXTERNAL SAFETY RELAYS PERFORMANCE
•
Use two independent stop circuit safety relays with mechanically linked contacts (such as GE CR120 BP
Machine Tool Relays or Telemecanique CA3-D relays) to reliably detect a welded contact.
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.
Failure to comply with these instructions could result in death or serious injury.
Summary of Contents for SYA14 Series
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