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Connector Pins
The connector pins on the bottom of the reader unit connectors are numbered in clockwise order from the
polarising pin (see figure 2). The following table lists the purpose of each pin on the connector.
Communications
Pin 1
Ground
Pin 2
+12VDC
Pin 3
RS232 in
Pin 4
RS232 out
Negative
Positive
N/A
N/A
Figure 2 Connector pin sockets
7
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