26
Chapter 2 2 Double-Feed Detection Section (Option)
S2-Y1540
1. Description
2. Operation
The double feed detection sensor is provided at the
ejection side of feed belt.
An ultrasonic sensor is used, and no adjustment for
fi tting it to the particular type of paper, and no input of
the paper thickness are required.
Whenever the ultrasonic sensor detects double feed,
the machine stops the operation.
TransmittingTransmitting
Receiving
Receiving
3. Operation of Each Part
1. Double Feed Sensor
<Operation>
Whenever the ultrasonic sensor detects double feed,
the machine stops the operation. The double feed is
detected not by the paper thickness, but by the number
of sheets.
<Circuit diagram>
42
V -
V +
21
12
CN9-2 4
42
21
Double feed sensor
Red
Yellow
Main PCB unit
Receiving
Transmitting
Receive PCB
Transmit PCB
White
Red
White Blue
24V Power supply unit
Brown
Blue
-0
2 Double Feed Detection Section (Option)
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