2: General operation Series 2600B System SourceMeter® Instrument
2-104 2600BS-901-01 Rev. B / May 2013
GPIB setup
This topic contains information about GPIB standards, bus connections, and primary address
selection.
The Series 2600B GPIB interface is IEEE Std 488.1 compliant and supports IEEE Std 488.2 common
commands and status model topology.
You can have up to 15 devices connected to a GPIB, including the controller. The maximum cable
length is the lesser of either:
• The number of devices multiplied by 6.5 ft (2 m)
• 65.6 ft (20 m)
You may see erratic bus operation if you ignore these limits.
GPIB standards
The GPIB is the IEEE-488 instrumentation data bus, which uses hardware and programming
standards originally adopted by the Institute of Electrical and Electronic Engineers (IEEE) in 1975.
The instrument is IEEE Std 488.1 compliant and supports IEEE Std 488.2 common commands and
status model topology.
Connect the GPIB cable
To connect an instrument to the GPIB bus, use a cable equipped with standard IEEE-488 connectors,
as shown below.
Figure 50: GPIB connector
To allow many parallel connections to one instrument, stack the connectors. Each connector has two
screws to ensure that connections remain secure. The figure below shows a typical connection
diagram for a test system with multiple instruments.
To avoid possible mechanical damage, stack no more than three connectors on any one instrument.
To minimize interference caused by electromagnetic radiation, use only shielded IEEE-488 cables.
Contact Keithley Instruments for shielded cables.
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