Safety Features - SICK T4000 Compact Instrucciones De Servicio

3
Chapter
Note
Note
WARNING
138
© SICK AG • Industrial Safety Systems • Germany • Subject to change without notice
System description
When the safety guard is opened, the safety outputs
disconnect the safety circuit and the door signal
output (OUT) is switched to LOW.
The status of the safety outputs is monitored inter-
nally by means of two microprocessors.
If an internal error occurs in the evaluation unit, the
safety circuit is disconnected and the red OUT/
ERROR LED lights up.
The dwell time of an actuator inside and outside the
operating range must be at least 0.5 seconds,
otherwise the evaluation unit could enter the error
state such that the red OUT/ERROR LED lights up.
Disconnecting the supply voltage resets the evalua-
tion unit to the operating state.
3.2

Safety features

The safety switch T4000 Compact complies with the
following safety requirements:
Performance Level e as per EN ISO 13849,
Proximity switches with circuit monitoring, type
PDF-M to EN 60947-5-3,
The circuit in the evaluation unit is configured
using redundancy design techniques with self-
monitoring. As a result, the safety guard remains
active even if a component fails.
The output state of the semiconductor outputs are
checked internally when the safety guard is
opened and closed.
To ensure that safety is maintained, always both
safety outputs (LA and LB) must be evaluated.
The door signal output OUT must not be used as a
safety output.
Operating Instructions
T4000 Compact
8009212/TF93/2010-03-29