8.2.2
State display
STATE light emitting diode
(red/green)
DIAG light emitting diode (yel‐
low)
Meaning
o
o
No voltage supply
O
red
o
No valid actuator in response
range. OSSD pair in OFF state
O
green
o
Actuator in response range.
OSSD pair in ON state
O
red
Ö
yellow
Signal to the In 1 and In 2
OSSD inputs invalid or not
available. No valid actuator in
response range OSSD pair in
OFF state
O
Red
O
Yellow
Signal to the In 1 and In 2
OSSD inputs invalid or not
available. Valid actuator in
response range OSSD pair in
OFF state
8.2.3
Fault displays
Table 16: Fault displays
STATE light emitting
diode (red/green)
DIAG light emitting
diode (yellow)
Possible cause
Corrective measure
o
o
No voltage supply
Check voltage supply.
If the light emitting
diodes do not light up
even if a voltage sup‐
ply is present, replace
the safety switch.
Ö
red
Ö
yellow
External fault
•
Check OSSD 1 and
OSSD 2 for short-
circuit downstream
of 0 V or 24 V DC,
or between one
another
•
Check cabling for
damage. There
must be a dual-
channel configura‐
tion.
Ö
red
o
Internal fault
•
Isolate the faulty
sensor and check
it separately
•
Check wiring for
cross-circuits and
short-circuits.
•
Switch the voltage
supply off and on.
•
If the fault still
occurs after this,
the sensor is
defective. Replace
sensor.
TROUBLESHOOTING
8
8018754/12IU/2020-01-30 | SICK
O P E R A T I N G I N S T R U C T I O N S | STR1
31
Subject to change without notice
