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7
The Diagnostic Interface (J45/COIN3)
Usage
Protocol
Pinouts
Sample interfaces
A-61124 March 1999
This chapter describes the communications between the scanner
and an RS-232 terminal, which may used to receive diagnostic
information.
The diagnostic interface (also referred to as COIN3) may be used
to receive diagnostic messages. This interface may be used as a
diagnostic tool during product development and integration.
The diagnostic port is labeled J45 on the rear panel of the
scanner.
The RS-232 communications protocol is:
• 9600 baud without the Image Manager accessory
19,200 baud with the Image Manager accessory
• 8 bits
• 1 start/stop bit
• No parity
• No handshake on DTR/CTS
A standard RS-232 interface is used
The diagnostic port (J45) has the following pinouts (25-pin female
DB 25 Connector):
Pin (J45)
2
3
5
7
20
This section illustrates the connection between the scanner
diagnostic port (J45) and the serial port of a personal computer.
FROM
Scanner
PC serial port
(25-pin male)
(9-pin female)
8
_____________ 1
2
_____________ 2
3
_____________ 3
6
_____________ 4
7
_____________ 5
20
_____________ 6
5
_____________ 7
4
_____________ 8
22
_____________ 9
Signal(s)
T x D
R x D
CTS
GND
DTR
TO
FROM
Scanner
(25-pin male)
1 ______________
3 ______________
2 ______________
5 ______________
3 ______________
20 _____________
7 ______________
6 ______________
TO
PC serial port
(25-pin female)
1
2
3
4
5
6
7
20
7-1
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