Festo Checkbox Compact CHB-C-F Manual Del Usuario página 16

Supplementary information
With counterlighting the Checkbox scans the test part as a shadow in front of a
bright background. The sensor looks directly at the source of light. This arrange
ment is to be recommended if the test part is at a long distance from the sensor or
if it has a shiny surface. Advantages: Recording is not influenced by the surface of
the object; the source of light is used efficiently.
With direct light the test part is illuminated frontally from the direction of the
Checkbox. Objects which reflect well therefore appear bright on a dark back
ground. Direct light illumination is used mainly in cases where light cannot be
mounted behind the test part.
Electrical connection of the illumination
When connecting the illumination please note:
S
the documentation supplied with the illumination
the instructions on the power supply of external components in the manual
type P.BE−CB−COMP−... .
Please note
Under the following conditions, current−consuming devices can be supplied
with power via pin 4 (GND) and pin 7 (+ 24 V) on the PLC connection.
S Connect only current−consuming devices which return the complete current
to the CHB−C−... . In this way you can prevent asymmetries of the currents in
the outgoing and return lines from reducing the effect of the filter.
S Load output pin 7 with maximum 700 mA.
S Note that the maximum sum current of all outputs must not exceed 1 A.
Setting the recording distance and the lens
The CHB−C−F is fitted at the factory with a standard 25.0 mm/f 1.4 wide−angle lens.
It has a standard connection for lenses on CCD cameras, complying with the
CMount standard.
Connecting thread on the lens: Outer thread 1"−32UN−2A
Support mass of 17.5 mm
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Festo P.BE−CB−COMP−ANL 0502NH English