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CHAPTER 5: Technical Description
Table 5-2. DB9 (EIA-574 DTE).
Signal
Name
Pin #
Mode
GND
Ground
5
—
TD
Transmit Data
3
Output
RTS
Request To Send
7
Output
DTR
Data Terminal Ready
4
Output
RD
Receive Data
2
Input
CTS
Clear To Send
8
Input
DSR
Data Set Ready
6
Input
DCD
Data Carrier Detect
1
Input
RI
Ring Indicator
9
Input
NOTE
Refer to the above chart if your RS-232 device has a DB9 connector. Use
a DB9-to-DB25 adapter with your device to adapt it to the cable’s DB25
port. Call Technical Support for details.