10-28 Remote Operations Model 6220/6221 Reference Manual
Return to Section 10 topics
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 Ta b l e 1 0-5.
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