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Mini Portable Reader User Manual
Appendix II:
RS-232 Connections
The Mini Portable Reader uses a 9-pin “D” connector to interface with computers
and printers. It is a socket-type connector that is commonly used for RS-232
interfaces. The following table shows the connections are also shown for a com-
mon 25-pin connector found on many computers and printers. The cable is
sometimes referred to as a null-modem cable.
Description
Table 2
RS-232 Connections
Reader
RS-232
RS-232
Reader
Computer
Computer
RS-232
Abbr.
Name
Signal
25-pin DTE
9-pin DTE
Pin #
Direction
Pin #
Pin #
2
RD
Receive Data
Output
3
2
3
TD
Transmit Data
Input
2
3
5
Grnd
Ground
None
7
5