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.
Rx1
Clearance
Tx2
ELS 300 Standard
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.5 1.0 1.5 2.0
Operating range [m]
Figure 5: Clearance in function of operating distance
5.4.

Timing diagram

Power supply Tx
uninterrupted
State of light beam
Output Rx:
NPN/DO
PNP/LO
Output Rx:
NPN/LO
PNP/DO
t
ON
Figure 6: Timing diagram
6
Tx1
Rx2
Operating range
Use not recommended,
because of crosstalking
2.5 3.0 3.5 4.0 4.5 5.0
uninterrupted
interrupted
t t
RI RL
Installation and operation manual
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00
0.2
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1.0 2.0
5.5 6.0
Turn-on time t
Turn-off time t
Response time on interruption t
Response time on light t
t
OFF
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ELS 300 Narrow aperture
Use not recommended,
because of crosstalking
0.4 0.6 0.8
Operating range [m]
ELS 300 Long-range
Use not recommended,
because of crosstalking
3.0 4.0 5.0 6.0 7.0 8.0
Operating range [m]
ON
OFF
RI
RL
© CEDES/January 2012
1 1.2
9.0 10.0 11.0 12.0
ELS 300 N & NA
< 30 ms
< 40 ms
< 20 ms
< 20 ms