User`s manual

BD2-1220/1221 User’s Manual
9
3.6 Paper Near-End Sensor Connector (CN6) * Option
3.6.1 Pin Description
Pin No. Signal Name Input/Output Function
1 PNE-A Output Photointerruptor’s anode
2 PNE-C Input Photointerruptor’s collector
3 GND — Photointerruptor’s cathode and emitter
Connectors: 5267-03A-X (Molex)
By default, pin 2 is tied to pin 3 with jumper J11 to deactivate the paper sensor (paper always
remains). If you need the Paper Near-End sensor function, obtain the connector above.
3.6.2 Reference Schematic Diagram
* The schematic diagram above is for a reflective photointerruptor. In this case the gap between the
sensor and paper surface should be approx. 1 mm. The electrical characteristics of the paper sensor
differ from one sensor model to another. Carefully study the specifications for the sensor you use.
* The control board has the following sensing threshold voltages (across pins 2 and 3):
0 to 0.4 V: Paper exists.
1 V or above: Paper end.
Paper sense status can not be guaranteed at any other voltage.
1
2
3
1000pF
33kΩ
100Ω
68kΩ
330Ω
Vdd Vdd
When Using a Photointerruptor
When Using a Switch
Control Board
1
2
3
NC
SW
Sensor
1 mm
Paper
Photointerruptor
(GP2S24)