Rockwell Automation 42JT-xxx VisiSight Photoelectric Background Suppression Sensors - Manual (Page 4)

10000212180 Ver 03
May 2014
Printed in Germany
068-14548
Power, Control and Information Solutions Headquarters
Americas: Rockwell Automation, 1201 South Second Street, Milwaukee, WI 53204-2496 USA, Tel: (1) 414.382.2000, Fax: (1) 414.382.4444
Europe/Middle East/Africa: Rockwell Automation NV, Pegasus Park, De Kleetlaan 12a, 1831 Diegem, Belgium, Tel: (32) 2 663 0600, Fax: (32) 2 663 0640
Asia Pacific: Rockwell Automation, Level 14, Core F, Cyberport 3, 100 Cyberport Road, Hong Kong, Tel: (852) 2887 4788, Fax: (852) 2508 1846
www.rockwel lautomation.com
Rockwell Automation maintains current product environmental information on its website at
http//www.rockwellautomation.com/rockwellautomation/about-us/sustainability-ethics/product-environmental-compliance.page .
Typical Response Curves
Background Suppression (180 mm)
Background Suppression (180 mm) — Spot Size
Background Suppression (400 mm)
 The spot is square in shape with one side dimension per graph.
0
0
5
10
15
20
3
2 1
3
2
1
200
(7.87)
150
(5.91)
100
(3.94)
50
(1.96)
Distance [m (ft)]
% of
distanc
e
black/white shift
6/90%
grey/white shift
18/90%
hysteresis
90/90%
0
5
10
15
0 200
(7.87)
150
(5.91)
100
(3.94)
50
(1.96)
Distance [mm (in.)]
Si
ze
[mm ]

0
5
10
15
20
3
2
1
3
2
1
0 200
(7.87)
400
(15.7)
100
(3.94)
300
(11.8)
Distance [mm (in.)]
% of
distanc
e
black/white shift
6/90%
grey/white shift
18/90%
hysteresis
90/90%
Background Suppression (400 mm) — Spot Size
Laser Background Suppression (120 mm)
Laser Background Suppression — Spot Size
The minimum distance required between the target and the
background depends upon the taught sensing range, the
reflectivity of the target, and the reflectivity of the background.
The curves can be used as a guide in a given application.
Example (for 400 mm model): at around 230 mm taught sensing
range, an 18% reflectivity grey target needs to be at least 5%, i.e.,
12 mm away from a 90% reflective white background.
0
5
10
15
20
25
30
0 200
(7.87)
400
(15.7)
100
(3.94)
300
(11.8)
Distance [mm (in.)]
Siz
e
[
mm]

0 20
(0.79)
40
(1.57)
60
(2.36)
80
(3.15)
100
(3.94)
120
(4.72)
0
5
10
15
20
3
1
3
2
1
2
Distance [mm (in.)]
Si
ze
[mm]
black/white shift
6/90%
grey/white shift
18/90%
hysteresis
90/90%
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0 20
(0.79)
40
(1.57)
60
(2.36)
80
(3.15)
100
(3.94)
120
(4.72)
Distance [mm (in.)]
Si
ze
[mm]