Honeywell SYA14 Series Manual page 20

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 light curtain
status.
Figure 2-9 Emitter Indicators
R1
R2
R3
2.5.1 Scanning range indicators (emitter)
R3 R3
R2 R1
yellow
yellow
yellow yellow
54% of the Nominal
Nominal Scanning Range
(factory setting)
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. The maximum emission power
corresponding to the light curtain Nominal Scanning Range is preset on delivery, and
these 3 LEDs light on permanently. If the Nominal Scanning Range NSR is decreased to
54 % or 42 %, then only 2 or 1 LEDs remain permanently on (see chapter 2.4.5 Scanning
Ranges).
2.5.2 Alarm indicator (emitter)
Alarm
Normal operation
red
The alarm indicator is a red LED which 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.
20
Scanning range indicators
scanning range indicators
(yellow)
(yellow)
Alarm indicator (red)
alarm indicator
(red)
Test indicator (yellow)
test indicator
(yellow)
R2 R1 R3 R2
yellow yellow
yellow yellow
42% of the Nominal
Scanning Range
Scanning Range
Alarm
Emitter failure
red
107031-23 EN FR26 GLO 1199 Printed in France
R1
yellow