Connections; Error Messages; Figure 4-1 Rs-232 Interface Connector - Keithley 2010 User Manual

RS-232 connections
The RS-232 serial port can be connected to the serial port of a controller (i.e., personal
computer) using a straight through RS-232 cable terminated with DB-9 connectors. Do not use
a null modem cable. The serial port uses the transmit (TXD), receive (RXD), and signal ground
(GND) lines of the RS-232 standard. It does not use the hardware handshaking lines CTS and
RTS. Figure 4-1
the pinout for the connector.
If your computer uses a DB-25 connector for the RS-232 interface, you will need a cable or
adapter with a DB-25 connector on one end and a DB-9 connector on the other, wired straight
through (not null modem).
Figure 4-1
RS-232 interface
connector
Table 4-2
RS-232 connector pinout
Pin number
1
CTS and RTS signals are not used.

Error messages

See Appendix B for RS-232 error messages.
shows the rear panel connector for the RS-232 interface, and
5 4 3 2 1
9 8 7 6
RS232
Rear Panel Connector
Description
1 no connection
2 TXD, transmit data
3 RXD, receive data
4 no connection
5 GND, signal ground
6 no connection
7 CTS, clear to send
8 RTS, ready to send
9 no connection
1
1
Remote Operation 4-7
Table 4-2 shows