SICK TR4 Direct Rectangular - Protective Functions; LED Indicators

Boundary area indication
S
ome variants of the safety switch are equipped with a boundary area indication. The
boundary area indication displays when the actuator is situated in the boundary area of
the response range when the sensor is active (weak signal). The Status/Diag LED then
lights up O yellow. The outputs are closed (High).
Magnetic holding force
S
ome variants of the safety switch are equipped with magnets. These magnets draw
the actuator to the sensor with their holding force so that the protective device (e. g. a
protective door) is held with a certain force. This makes unintended opening of the pro‐
tective device more difficult in the event of disturbances such as shock and vibration,
thereby increasing machine availability.
3.2 Protective functions
The safety switch features the following internal protective functions:
•
S
hort-circuit protection at all outputs
•
Overload protection at all outputs
•
Reverse polarity protection of the supply voltage
3.3 LED indicators
Table 1: LED indicators
Status/Diag LED Meaning
o Of
f
No supply voltage
3 × Ö gr
een
1 × Ö red
Power up sequence
O Gr
een
Actuator in response range
S
afety outputs active
Aux application diagnostic output deactivated
O R
ed
Actuator outside of response range
S
afety outputs deactivated
Aux application diagnostic output active
Ö Y
ellow
Sensor approaches the maximum response range (boundary area indi‐
c
ation, only with certain variants)
Ö R
ed or Ö green
Error. see
table 5, page 20
Further topics
•
see
table 4, page 18
•
see table 5, page 20
PRODUCT DESCRIPTION 3
8023286/15V1/2019-11-22 | SICK O P E R A T I N G I N S T R U C T I O N S | TR4 Direct Rectangular
9
Subject to change without notice