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A-61124 March 1999 7-1
7 The Diagnostic Interface (J45/COIN3)
This chapter describes the communications between the scanner
and an RS-232 terminal, which may used to receive diagnostic
information.
Usage
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.
Protocol
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
Pinouts
The diagnostic port (J45) has the following pinouts (25-pin female
DB 25 Connector):
Pin (J45) Signal(s)
2T x D
3R x D
5CTS
7GND
20 DTR
Sample interfaces
This section illustrates the connection between the scanner
diagnostic port (J45) and the serial port of a personal computer.
FROM TO FROM TO
Scanner PC serial port Scanner PC serial port
(25-pin male) (9-pin female) (25-pin male) (25-pin female)
8 _____________ 1 1 ______________ 1
2 _____________ 2 3 ______________ 2
3 _____________ 3 2 ______________ 3
6 _____________ 4 5 ______________ 4
7 _____________ 5 3 ______________ 5
20 _____________ 6 20 _____________ 6
5 _____________ 7 7 ______________ 7
4 _____________ 8 6 ______________ 20
22 _____________ 9