Influence Of Reflective Surfaces - Panasonic SF4B-H12C Instruction Manual

2-3-3 Influence of Reflective Surfaces

If there exists a reflective surface in the place where this device is to be installed, make sure to
install this device so that reflected light from the reflective surface does not enter into the receiver,
or take countermeasures such as painting, masking, roughening, or changing the material of the
reflective surface, etc. Failure to do so may cause the device not to detect, resulting in death or
serious injury.
Install this device at a distance of at least A (m) (given below) away from reflective surfaces
such as metal walls, floors, ceilings, workpieces, covers, panels or glass surfaces.
<Side View>
Reflective ceiling
A
Emitter
Sensing range
A
Reflective floor
Distance between emitter and receiver (Sensing range L)
Note: The effective aperture angle for this device is ±2.5° or less (when L > 3m) as required by IEC 61496-2,
ANSI/UL 61496-2. However, install this device away from reflective surfaces considering an effective aper-
ture angle of ±3° to take care of beam misalignment, etc. during installation.
Allowable Distance from This Device to Reflective Surface
© Panasonic Industrial Devices SUNX Co., Ltd. 2014
Ramco National
WARNING
Receiver
L
0.3 to 3m
3 to 7m
Install in this area
Do not install in this area
Distance between emitter and receiver
800-280-6933 | nsales@ramcoi.com
Protection Area
<Top View>
Reflective surface
A
θ
Emitter
θ
Sensing range
L
Allowable installation distance A
0.16m
L/2 × tan 2θ = L/2 × 0.105 (m) (θ = 3°)
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Receiver
19