Cycle Start Mode; Wiring Diagrams - Honeywell SYA14 Series Manual

Cycle Start Mode

During the cycle start mode, the R4 LED on the receiver flickers and the cycle start mode
push-button on the external relay monitoring loop (C3-C5) requires actuation. Once actuated,
the light curtain changes to a green condition (R3 LED is illuminated, R2 LED is not
illuminated) and allows the machinery to operate.
Figure 3-5 FF-SB Series CE Version (cycle start mode) with external relay monitoring
by the FF-SB
RECEIVER
Jumper links on the receiver
power board provide access
to this mode

Wiring Diagrams

IMPROPER SYSTEM PERFORMANCE
Ensure independent stop circuit safety relays have mechanically linked contacts that prevent
contact overlapping in the event of a welded contact.
Failure to comply with these instructions could result in death or serious injury.
The following wiring diagrams illustrate the electrical connections for the FF-SB Series light
curtains. The customer must supply the three safety relays, R1, R2 and R3, the cycle start
push-button and the test circuit.
Mechanically linked contact relays are sometimes called captive contact, anti-weld, or guided
contact relays.
50 Honeywell • MICRO SWITCH Sensing and Control
C4
B3
C3
C5
NOTICE: Points C4 and B3 are jumpered
if the optional test function is not used
(no voltage is applied).
FF-SB Series Installation Manual
Optional test function
Cycle start mode
R1
For application help: call 1-800-537-6945
R2