Installation Of Two Or More Light Barriers; Timing Diagram - Cedes ELS 300 Bedienungsanleitung

ELS 300
5.3.

Installation of two or more light barriers

To avoid cross-talking effects, it is necessary to keep a minimum clearance between two systems. This clearance
depends on the operating range at which the systems are used. In the diagrams in Figure 5, the minimum
clearance for the different types is shown.
Clearance
Figure 5: Clearance in function of operating distance
5.4.

Timing diagram

Power supply Tx
State of light beam
Output Rx:
NPN/DO
PNP/LO
Output Rx:
NPN/LO
PNP/DO
Figure 6: Timing diagram
6
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Rx1 Tx1
Tx2
Rx2
Operating range
Operating range [m]
uninterrupted uninterrupted
interrupted
t t t
ON RI RL
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ELS 300 Narrow aperture
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
0.2 0.4
Turn-on time t
Turn-off time t
Response time on interruption t
Response time on light t
t
OFF
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Use not recommended,
because of crosstalking
0.6 0.8 1
Operating range [m]
Operating range [m]
ELS 300 N & NA
< 30 ms
ON
< 40 ms
OFF
< 20 ms
RI
< 20 ms
RL
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1.2