System Components - SICK LE20 Betriebsanleitung

Chapter 3
Note
Note
Note
WARNING
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Product description
The system does not return to normal muting monitoring mode
until all of the muting sensors have been disabled.
If the fault recurs in muting mode, the system and the layout of the
muting sensors must be checked.
The override function is activated only when the override
pushbutton is pressed for at least 28 ms.
Once the override pushbutton has been pressed, the system must
return to normal muting monitoring mode within max. 30 minutes,
otherwise the evaluation unit will stop operation of the system.
A lamp, which always lights up to indicate when the override
pushbutton can be pressed, can be connected to the 14 OVERRIDE
LAMP terminal.
If the override lamp is faulty or not connected, the override
function may still be active (see Chapter 8).
The override function cannot be deselected.
Make sure that the override pushbutton and lamp are
installed at a suitable location!
The override pushbutton must be installed so that it cannot be
pressed from inside the hazardous area and that operators have a
clear view of the entire hazardous area when pressing the
pushbutton. The override lamp should be visible from the system
control panel.
A NO contact, which connects 24 V to the OVERRIDE input of the
evaluation unit when actuated, must be used as the override
pushbutton.
Technical data for the override lamp:
Operating voltage
Wattage of bulb
Cable length (max.)
Color
3.5

System components

Muting sensors
All types of sensors can be connected to the safety evaluation
unit:
Operating Instructions
Safety Evaluation Unit LE 20
24 V DC
1 ... 10 W
10 m
white
8 008 685/Q913/2007-05-21