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Opto Theory
The opto receiver (Photo Transistor) should be approximately 0.1 - 0.7 volts when the opto beam is
unblocked and approximately 11 - 13 volts when the opto beam is blocked. The opto transmitter
(LED) should always be approximately 1.4 volts.
Note:
The transmitter (LED) is larger than the
receiver (Photo Transistor); it protrudes further from its case.
LED Board (A-16908)
Transmitter
1.0-1.1 Volts
Photo Transistor
Board (A-16909)
Receiver
0.1-0.7V Unblocked
11 -1 3V Blocked
Infrared Ray
Green
o
WHT
Gray-XXX
Black
Gray-Yellow
Orange-XXX
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