Product data
Indicators
5
A6V11571319_en--_b
23 | 34
5.4 Indicators
The LED indicator on the printed circuit board shows the status of the Loop isolator
(100V). An external LED has the same function.
Behaviour
Timing
Pause
Meaning
information
1x flash
10 Hz
Pilot tone-interval Normal
Pilot tone was detected
SIL-switch 6 [2] = ON
Constant blinking
1 Hz
-
Alarm
Loop in Alarm mode, (Alarm
message) active
SIL-switch 7 [3] = ON
1x flash
10 Hz
3 s
Start-up inspection LED starts to flash, when the pilot
tone is active for longer than 90 s
and turns into normal mode when
the pilot tone interval starts
2x blinking
1.6 Hz
5 s
Fault
Short circuit detected
3x blinking
1.6 Hz
5 s
Fault
No loudspeaker connected to the
loop isolator
4x blinking
1.6 Hz
5 s
Fault
Overload on the loop isolator
connection or OUT and SP
connections mixed up
5x blinking
1.6 Hz
5 s
Fault
Product fault
1 s fast blinking
10 Hz
5 s
Fault
No pilot tone detected
1 s fast blinking and
loop isolator relays
switches 2x
20 Hz
6 s
Maintenance
Loop isolator is in maintenance
mode ('PACE-Design':
Supervision, General Flags, 'EN
Maintenance' active) and a fault
was detected since the last power-
up or loop isolator reset