Configuration Examples - SICK LE20 Instrucciones De Operación

Chapter 10
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Configuration examples

10
Configuration examples
Configuration examples in fold-out section
(pages 675 ... 680):
a = output circuits. These contacts must be integrated in the control such that
when the output circuit is open the hazardous state is cancelled. In categories 4
and 3 this integration must be over two channels (x/y channels). Single-channel
insertion in the control (z channel) is possible only with a single-channel control
and in observance of the risk analysis..
10-1: Evaluation unit LE 20 with 6 single-beam photoelectric safety
switches VS/VE 18-2
R = Receiver
Note: If only one photoelectric switch pair is connected, a n
additional wire link must be connected between SENSOR A (4) and
SENSOR B (6).
Configured functions:
10-2: Evaluation unit LE 20 with 4 single-beam photoelectric safety
switches (WS/WE 27-2, WS/WE 24-2, WS/WE 18-2 or WS/WE 12-2)
R = Receiver
Note: If only one photoelectric switch pair is connected, a n
additional wire link must be connected between SENSOR A (4) and
SENSOR B (6). A mix of safety photoelectric switches is not
permitted
Configured functions:
10-3: LE 20 with a cascade C 2000 – C 2000 – M 2000
R = Receiver
Configured functions:
Safety Evaluation Unit LE 20
S = Sender
External device monitoring
Restart interlock
External testing
S = Sender
External device monitoring
Restart interlock
External testing
S = Sender
External device monitoring
Restart interlock
External testing
Operating Instructions
8 008 685/Q913/2007-05-21