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Optics
Fibroptonic
Ref : 202 012
2 Commissioning
❖ Power supply:
Both, transmitter and receiver modules must be powered by a constant DC generator
providing between 6 and 12 volts. It is thus possible to power them both with a single
voltage generator even if it is educationally better to separate the input circuit from the
output circuit by using either 2 voltage generators or 2 9 V batteries.
❖ Transmitter module test:
Simply connect its red and black terminals to the power supply and operate the on/off
switch located beside the optical transmitter. When the green LED comes on, an infrared
signal having a wavelength of 0.85 micrometers is emitted by the optical transmitter.
❖ Receiver module test:
Simply provide a voltage of between 6 and 12 V between its red and black terminals (it is
not necessary to connect the optical fibre). The red LED must be off. As soon as we
illuminate the photoreceptor with a torch, the red LED comes on; the receiver has received
an optical signal.
❖ Optical fibre:
VERSION No.1
To connect the 2 transmission and reception units with optical fibre:
Figure 4: installing the optical fibre
VERSION No. 2
To connect the 2 transmission and reception units with optical fibre, simply insert the two
ends of the fibre in each of the units.
2.1 How to cut an optical fibre:
ENGLISH
•
Loosen the 2 blue and black plastic screws
•
Pass the fibre until its ends touch the emitting and receiving diodes located inside
the blue and black ends of the transmitter and receiver units
•
Tighten once again the 2 screws without forcing them (figure 4).
Box
Transmitter
•
The 2 ends of the fibre have been carefully stripped and scraped. But if, for
any reason, we wish to cut it, the ends must be recut carefully.
•
Using a cutter cut off 5 to 10 mm of the transparent end of the black protective
casing.
Fibre
screws
Casing
41
Receiver
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