Operation - Honeywell SYA14 Series Manual

Operation

The FF-SB12, FF-SB14 and FF-SB30 Series are thru-scan light curtains. Emitters transmit
modulated, infrared light that is detected by photoreceivers in the receiver (see figure 1-5).
The number of light beams depends on the protected height and resolution of the light curtain.
Figure 1-5 FF-SB Series Operational Diagram
The FF-SB15 Series is also a thru-scan type light curtain. The emitter transmits two or three
groups of eight beams each, plus the synchronization beam.
Resolution
FF-SB Series light curtain resolution (sometimes called 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. The FF-SB Series does
not have a sensitivity adjustment.
Two factors determine the resolution of the light curtain: beam center distance and light beam
diameter (see figure 1-6). FF-SB12 has a center distance of 12,7 mm (0.5 inches) and the FF-
SB14 and the FF-SB30 have a center distance of 25,4 mm (1 inch).
16 Honeywell • MICRO SWITCH Sensing and Control
FF-SB Series Installation Manual
For application help: call 1-800-537-6945