4
As light is polarized by a transparent film or membrane, CX-491F may not
detect an object covered or wrapped by transparent film. Such objects
include, for example:
Can wrapped by clear film
Aluminum sheet covered by plastic film
Gold or silver (glossy) labels or wrapping paper
In such cases, take the following steps.
1 Tilt the sensor with respect to the object to be sensed.
2 Reduce the sensitivity.
3 Increase the distance between the sensor and the object to be sensed.
The slit mask is only available for the thru-beam type sensor.
Optional slit masks help the sensor detect small objects. However, the
sensing range is reduced.
How to mount
1 Insert the hook (1) into the bottom groove (2).
2 Press the slit mask until it snaps into the grooves (3) on the top of the
main unit.
How to remove
1 Insert a screw driver into the tab (4).
2 Lift and remove carefully.
Interference prevention filters are only available for the thru-beam
type sensor.
By mounting interference prevention filters, two sets of thru-beam type
sensors can be mounted close together. However, the sensing range is
reduced.
The filters can be mounted using the same method as for slit masks. For
details, see page 4, section 9, SLIT MASKS.
For interference prevention to work, the following conditions must be
met.
The two sets of sensors must be fitted with different types of interference
prevention filters.
Filters must be mounted on emitters and receivers.
The model no. is not shown on the interference prevention filters.
Take care when mounting them on the sensors.
8
RETROREFLECTIVE TYPE SENSOR WITH
POLARIZING FILTERS
9 SLIT MASKS
Type Model no. Slit size
Round slit mask
OS-CX-05 ∅ = 0.5mm
OS-CX-1 ∅ = 1mm
OS-CX-2 ∅ = 2mm
Rectangular slit mask
OS-CX-05 x 6 0.5 × 6mm
OS-CX-1 x 6 1 × 6mm
OS-CX-2 x 6 2 × 6mm
1
2
3
4
Slit mask
10 INTERFERENCE PREVENTION FILTERS
Model no.
Direction of thru-
beam axis
Color of the bracket
PF-CX4-H Horizontal Light brown
PF-CX4-V Vertical Silver
PF-CX4-H
PF-CX4-V
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