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Model 2790 SourceMeter Switch System Reference Manual
Table 10-3
port connector on the computer (PC).
Error messages
See
Appendix B
provides pinout identification for the 9-pin (DB-9) or 25-pin (DB-25) serial
Table 10-3
PC serial port pinout
Signal
DCD, data carrier detect
RXD, receive data
TXD, transmit data
DTR, data terminal ready
GND, signal ground
DSR, data set ready
RTS, request to send
CTS, clear to send
RI, ring indicator
for RS-232 error messages (+800 through +808).
DB-9 pin
DB-25 pin
number
number
1
8
2
3
3
2
4
20
5
7
6
6
7
4
8
5
9
22
10-21
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