LED response Sensor connected to responding IN
inputs
Meaning/Causes
SF-LED on cen‐
tral unit
Input LEDs on central
unit or expansion mod‐
ule
ashing red The IN LEDs of a sensor
are ashing green.
• Monitoring Universal
• EMERGENCY STOP
• ESPE
• Protective door
• Safety shutdown mat with NC prin‐
ciple
• Discrepancy condition violated
For further information, see Safety ES
• Two-hand operation • Discrepancy condition violated
Other meanings for Advanced/
ASIsafe:
• Pushbutton stuck
• Do not release both pushbuttons
For further information, see Safety ES
• Enabling button • Discrepancy condition violated
Other meanings for Advanced/
ASIsafe:
• Pushbutton stuck
For further information, see Safety ES
• Protective door with lock • Discrepancy condition violated
• Interlock not possible because the
protective door is open
• Muting functions • Discrepancy condition sensor pair x
not fullled
--
• Muting functions • Max. muting time exceeded
Basic: The IN LEDs of a
sensor are ashing
green.
Advanced/ASIsafe: The
sensor that triggered the
sequence violation is
ashing green.
• Monitoring Universal
• Protective door
• Protective door with lock
• Sequence condition not fullled
The sequence condition was not
fullled in accordance with the pa‐
rameter assignment.
One or more IN LEDs
ashing green.
The error was detected at
this input.
• Muting functions • Sequence condition not fullled
(muting)
The sequence condition was not
fullled in accordance with the pa‐
rameter assignment.
Diagnostics / service
7.3 Diagnostics with LEDs
SIRIUS 3RK3 Modular Safety System
254 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006