ABB Focus II FII-4-14 Series - Page 14

14
2TLC172015M0201, rev. D www.abb.com/lowvoltage
2,0
1,8
1,5
1,2
1,0
0,8
0,5
0,2
-0,2
-0,5
-0,8
-1,0
-1,2
-1,5
-1,8
-2,0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Type 4
Operating range R in meter
Minimum distance d in meter
3.4 Distance to Ref lecting Surfaces
The barrier should be mounted so that the risk of ref lection from ref lecting surfaces is minimized. The
minimum distance to a ref lecting surface is shown below.
R
EAA
EAA
d
Operating range R: is the effective working range of the Focus II system, from the transmitter to
the receiver.
EAA: is the effective aperture angle of the Safety Sensor.
It is ±2.5° for FII-4....
distance d: is the minimum distance to a ref lective surface.
This distance must be greater than:
d
min
FII-4 = tan(2.5°)×R
Be aware that surface interference may also appear above and below the sensing f ield.