National Instruments GPIB-120A GPIB BUS Expander/Isolator

National Instruments GPIB-120A GPIB BUS Expander/Isolator

Part Number: 181555-01, 181555D-01, 181555E-01, 181555C-01, 181555K-01

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Stock # 56697-1
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National Instruments GPIB-120A GPIB BUS Expander/Isolator

  • Expands the Number of GPIB Devices to 28
  • 1600 V Electrical Isolation Between GPIB Systems
  • Bidirectional Expansion - Controllers, Talkers, and Listeners Can Exist on Either Side
  • Software Transparent - No Software Modifications Required
  • Built-In 120 or 240 VAC Power Supply
  • Signal Buffering Extends the Maximum GPIB Cable Limit to 40m (Device Load Every 2m of Bus Cable)


The National Instruments GPIB-120A is a high-speed bus expander that connects 2 GPIB (IEEE 488) bus systems. This expander increases the maximum number of GPIB system devices from the IEEE 488.1 standard of 15 electrical device interface loads to 28. The GPIB-120A provides an electrically isolated interface to one or more devices making it useful in test and measurement systems. The GPIB-120A is software transparent and extends the GPIB by effectively doubling the 20 m cable limit.

Product Family: gpib120A, gpib-120A, 776564

Important Notice: Please note that any additional items included with this equipment such as accessories, manuals, cables, calibration data, software, etc. are specifically listed in the above stock item description and/or displayed in the photos of the equipment. Please contact one of our Customer Support Specialists if you have any questions about what is included with this equipment or if you require any additional information.

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National Instruments GPIB-120A GPIB BUS Expander/Isolator
National Instruments GPIB-120A GPIB BUS Expander/Isolator

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Manuals, Datasheets, Drivers, Links

NI GPIB-120A Datasheet (pdf) 
NI GPIB-120A Manual (pdf) 
Link to National Instruments Website 

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