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10-28 Remote Operations
Model 6220/6221 Reference Manual
Return to
Table 10-6
PC serial port pinout
Signal*
DB-9
pin number
DB-25
pin number
DCD, data carrier detect
1
8
RXD, receive data
2
3
TXD, transmit data
3
2
DTR, data terminal ready
4
20
GND, signal ground
5
7
DSR, data set ready
6
6
RTS, ready to send
7
4
CTS, clear to send
8
5
RI, ring indicator
9
22
* The Model 622x does not use all RS-232 signals. See
.
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