ELS 300
Installation and operation manual
6
www.cedes.com
© CEDES/October 2016
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.
Tx2
Rx2
Rx1
Tx1
Operating range
Clearance
ELS 300 Narrow aperture
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.2
0.4
0.6
0.8
1
1.2
Operating range [m]
M
in
. cl
ear
an
ce
[m
]
Use not recommended,
because of crosstalking
Operating range [m]
Operating range [m]
Figure 5: Clearance in function of operating distance
5.4. Timing diagram
Power supply Tx
State of light beam
t
ON
t
OFF
t
RL
t
RI
Output Rx:
NPN/LO
PNP/DO
Output Rx:
NPN/DO
PNP/LO
interrupted
uninterrupted
uninterrupted
ELS 300 N & NA
Turn-on time t
ON
< 30 ms
Turn-off time t
OFF
< 40 ms
Response time on interruption t
RI
< 20 ms
Response time on light t
RL
< 20 ms
Figure 6: Timing diagram