Operating Principle Of The Device - SICK T4000 Multi Instrucciones De Operación

Operating instructions
T4000 Multi
8011036/TF94/2010-06-29 © SICK AG • Industrial Safety Systems • Germany • Subject to change without notice
System description
Two variants of the safety evaluation device can be
supplied. Up to two read heads can be connected to
the safety evaluation device T4000-1RCA02 and up
to four read heads can be connected to the safety
evaluation device T4000-1RCA04.
In addition, a reset button (monitored) and an
external device monitoring unit for monitoring
external relays can be connected.
The operational statuses are displayed by means of
LEDs.
3.2 Operating principle of the
device
The actuator mounted to the moving part of the pro-
tective device moves towards the sensor when the
device is closed. The actuators are scanned dynami-
cally. When the switch-on distance is reached the
actuator is supplied with power via the sensor so
that the data can be transferred.
The scanned bit pattern is compared with the stored
code in the safety evaluation device. If the data cor-
respond, the diagnostic output 01...02 or 01...04
(semiconductor output) for the door of the corrspon-
ding sensor is set to HIGH depending on the safety
evaluation device used. The safety outputs (relay
outputs) are enabled when all the data of the con-
nected sensors correspond; the LED OUT lights up.
When a monitored protective device is opened, the
safety outputs deactivate the safety circuit; the LED
OUT goes out. The status of the safety outputs is
monitored internally via positively guided N/C
contacts (relay output).
The status of all connected protective devices can
be scanned regardless of the output state of the
safety circuit via the diagnostic outputs 01...02 or
01...04 for the doors.
3
Chapter
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