Keithley 2600B User Manual

Section
2: General operation Series 2600B System SourceMeter® Instrument
Reference Manual
2-110 2600BS-901-01 Rev. C / August 2016
RS-232 connections
Connect the RS-232 serial port of the Series 2600B to the serial port of a 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), CTS and RTS (if flow control is enabled), and signal
ground (GND) lines of the RS-232 standard. The connector location is shown in
Remote
Communication interfaces (on page 2-88).
If your computer uses a DB-25 connector for the RS-232 interface, you will need a standard cable or
adapter with a DB-25 connector on one end and a DB-9 connector on the other. An RS-232 cable is
available from the Keithley Instruments webite (http://www.tek.com/keithley).
Figure 49: RS-232 interface connector
RS-232 connector pinout
Pin number Description
1 Not used
2
TXD, transmit data
3
RXD, receive data
4 Not used
5
GND, signal ground
6
Not used
7
RTS, ready to send
8
CTS, clear to send
9
Not used
The following table provides pinout identification for the 9-pin (DB-9) or 25-pin (DB-25) serial port
connector on the computer.
Computer 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, request to send
7
4
CTS, clear to send
8
5
RI, ring indicator
9
22
* The Series 2600B does not use all RS-232 signals. See the topic Flow control and signal
handshaking (on page 2-109).

Keithley 2600B Specifications

General

Brand	Keithley
Model	2600B
Category	Measuring Instruments
Language	English