SICK STR1

8.2.2 State display
STATE light emitting diode
(r
ed/green)
DIAG light emitting diode (yel‐
low)
Meaning
o o
No voltage supply
O r
ed o
No valid actuator in response
r
ange. OSSD pair in OFF state
O gr
een o
Actuator in response range.
O
SSD pair in ON state
O r
ed Ö yellow
Signal to the In 1 and In 2
O
SSD inputs invalid or not
available. No valid actuator in
response range OSSD pair in
OFF state
O R
ed O Yellow
Signal to the In 1 and In 2
O
SSD 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 (r
ed/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 r
ed Ö yellow
External fault
•
Chec
k 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 r
ed o
Internal fault
•
Isola
te 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