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Appendix B
Signal Descriptions
B-9
B.5
Serial Port B Connector
The serial port B connector is a DB-9 type connector located on the serial/parallel
connector back panel. The serial port B connector provides asynchronous serial
communications. The following figure illustrates the serial port B connector
configuration and the following table lists the pin assignments.
FIGURE B-5
Serial Port B Connector Pin Configuration
TABLE B-6
Serial Port B Connector Pin Assignments
Pin
Signal
Description
1
CD
Carrier detect
2
RD
Receive data
3
TD
Transmit data
4
DTR
Data terminal ready
5
GND
Ground
6
DSR
Data set ready
7
RTS
Request to send
8
CTS
Clear to send
9
RI
Ring indicator
B
5
1
9
6
Summary of Contents for Ultra 5
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