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2.4 Operation
The FF-SYA14, FF-SYA30 and FF-SYA60 Series are thru-scan light curtains. Emitters
transmit modulated, infrared light that is detected by photoreceivers in the receiver. The
number of light beams depends on the protected height and resolution of the light curtain.
Figure 2-6 FF-SYA Series Operational Diagram
Sensing range
Prot
ec
ti
on H
e
ight
2.4.1 Synchronization
The emitter and the receiver are optically synchronized. The synchronization is an
effective beam transmitted by the emitter towards the receiver. No connection is
necessary between the emitter and the receiver which simplifies installation and
maintenance.
2.4.2 Resolution
FF-SYA Series light curtain resolution (sometimes called minimum object sensitivity) is
the minimum object size that will interrupt at least one light beam when it enters the
sensing field. Anything entering the sensing field equal to or greater than this minimum
size will be detected. Resolution is not affected by scanning distance or dust
accumulation. For safety reason, the FF-SYA Series does not have a sensitivity
adjustment. Two factors determine the resolution of the light curtain: beam pitch and light
lens diameter (see Figure 2-7). Lens diameter is the smallest width that will block a single
light beam. The combination of the beam diameter and center distance gives the FF-
SYA14 (see Figure 2-6) a resolution of 14 mm (0.6 in.), the FF-SYA30 a resolution
of 30 mm (1.2 in.) and the FF-SYA60 a resolution of 60 mm (2.4 in.).
Sensing range
P
rotecti
on hei
ght
Emitter
Receiver
F
SYA6
Summary of Contents for SYA14 Series
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