107031-33-EN FR26 GLO 1101 Printed in France
11
IMPROPER CHANGE OF SCANNING RANGE
Do not change the position of the scanning range selector with the power applied to the emitter. Always remove the emitter
power before changing the selector position.
Failure to comply with these instructions could result in death or serious injury.
2.5
Indicators
The FF-SYA Series emitters have five LED indicators. The receivers have four LED indicators. These LED indicators provide
important information related to the light curtain status.
Figure 2-9 Emitter Indicators
sca
(yel
test
(yell
alarm
(red
R1
R2
R3
2.5.1
Scanning range indicators (emitter)
R3
R2
R1
R2
R1
R3
R3
R2
R1
The emitter is equipped with a scanning range selector for the control of the infrared emission power. The scanning range
indicators are 3 yellow indicators which give an information on the selected scanning range.
When the maximum emission power has been selected, the nominal scanning range can be achieved and three LEDs R1, R2
and R3 are lit on permanently. Lit on LEDs R2 and R3 indicate, that a medium emission power had been selected and
scanning range is decreased to medium.
When emission power and nominal scanning range are decreased to MEDIUM respectively MINIMUM, then only two LEDs (R2
and R3) or respectively one LED (R3) remain permanently on (see chapter 2.4.6 Scanning Ranges for further information).
2.5.2
Alarm indicator (emitter)
red
Alarm
Normal operation
red
Alarm
Emitter failure
The alarm indicator is a red LED that flashes if the emitter is detecting an emission problem. The receiver is in an alarm state
and the emitter needs to be changed for correct operation. If this LED is off while the receiver is in an alarm state despite the
sensing field is clear, then the receiver may be suspected.
Scanning range indicators (yellow)
Alarm indicator (red)
Test indicator (red)
F
SYA9
F
SYA3
2
F
SYA3
3
F
SYA4
F
SYA5
F
SYA1
1
Maximum scanning range
Medium scanning range
Minimum scanning range