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July 2025
GPIB-120A
GPIB-120A, Built-In 120 or 240 VAC Power Supply, GPIB Expander/Isolator
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
✔ Free Domestic Ground Shipping
✔ NIST Calibration Available
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" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments GPIB-120A GPIB Expander/Isolator
The NI GPIB-120A (Part Numbers: 776564-01, 776564-02, 776564-03, 776564-04, 776564-05, and 776564-06) is a GPIB Expander/Isolator. The IEEE 488.1 standard allows as many as 15 electrical loads in a GPIB system. Additionally, the GPIB-120A expands the maximum GPIB system devices limit from 15 to 28. This GPIB Expander can also be used in measurement and test systems, since it offers an electrically isolated interface. The GPIB is an interface or link system that is used by interconnected devices to communicate. In this arrangement, interconnected devices communicate through messages that flow across the interface system.
With this model, rewriting user’s application software is not required because this model comes with transparent software. Thus, the user can connect two GPIB systems in a functionally transparent scheme. The GPIB-120A Bus Expander can double the cable limit of 20 meters as well. This GPIB Expander consists of two busses: Bus A and Bus B. Both sides come with identical circuitry and operate in complete isolation from each other. The NI device is equipped with operating and breakdown isolations of 60 V and 1600 V respectively. It is equipped with a standard Amphenol or Cinch series 57 Microribbon or Amp Champ type connector.
The NI GPIB-120A features seven LEDs on the front panel. The state of the Active Controller and System Controller is indicated by a dedicated LED. Bus A and B incorporated in this expander are capable of being appeared as independent GPIB devices. The National Instruments GPIB-120A comes with 16 signal lines and eight shield drain or ground return lines. The 16 signal lines provided can be divided into these three groups: five interface management lines, three handshake lines, and eight data lines. The device has a typical power requirement of 27 VA. It has a typical data transfer rate degradation of 250 ns per byte.
The GPIB-120A is equipped with a case which measures 3.5 x 8.5 x 13.0 inches. The case is made with UL94V-0 flame retardant polystyrene DOW 60875F or Noryl FN-215. It has a recommended operating temperature range of 0° to 45° C, and a non-condensing relative humidity range of 5% to 95%.
| Model | GPIB-120A |
|---|---|
| Manufacturer | National Instruments |
| Part Numbers | 776564-01, 776564-02, 776564-03, 776564-04, 776564-05, and 776564-06 |
| Type | GPIB Expander/Isolator |
| Expands the GPIB to interface | 28 devices maximum |
| Maximum Cable Length | 20 m |
| Data Transfer Rate Degradation | 250 ns per byte, typical |
| Case Size | 3.5 in. by 8.5 in. by 13 in. |
| Power | 27 VA typical |
| GPIB-120A Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
Associated part numbers for GPIB-120A:
National Instruments GPIB-120A Frequently Asked Questions
Question: What are the differences between the six part numbers for the GPIB-120A Bus Expander?
Answer: The GPIB-120A Bus Expander has six power input options. The first part number, 776564-01, is U.S. 120 VAC. Part number 776564-02 is Swiss 220 VAC. The next part number, 776564-03, is Australian 240 VAC. Part number 776564-04 is Universal Euro 240 VAC. Part number 776564-05 is North American 240 VAC. The last part number, 776564-06, is United Kingdom 240 VAC.
Question: What is the isolation of the NI GPIB-120A?
Answer: The isolation of the NI GPIB-120A is 60 V operating, 1600 V breakdown.
Question: What is the read from isolated GPIB instrument transfer rate on the GPIB-120A?
Answer: On the GPIB-120A, the read from isolated GPIB instrument transfer rate is 800 kbytes/s maximum.
Question: Can the NI GPIB-120A be rack-mounted?
Answer: Yes, the NI GPIB-120A can be rack-mounted two ways: either way with a single rack-mount kit or a dual rack-mount kit.
GPIB-120A PDF Manuals
ARCHIVED--GETTING-STARTED-WITH-YOUR-GPIB-SCSI-A-AND-NI-488.2-FOR-SOLARIS-AND-SPECIFICATIONS.PDF
ARCHIVED--GETTING-STARTED-WITH-YOUR-SB-GPIB-TNT-AND-NI-488.2-FOR-SOLARIS-AND-SPECIFICATIONS.PDF
ARCHIVED--GETTING-STARTED-WITH-YOUR-SB-GPIB-TNT-AND-THE-NI-488.2M-SOFTWARE-FOR-SOLARIS-2.PDF
ARCHIVED--GPIB-110-USER-MANUAL-AND-SPECIFICATIONS.PDF
ARCHIVED--GPIB-120A-USER-MANUAL-AND-SPECIFICATIONS.PDF
ARCHIVED--GPIB-HARDWARE-GUIDE.PDF
ARCHIVED--INSTALLATION-GUIDE-FOR-DUAL-RACK-MOUNT-KIT-FOR-GPIB-100A-110-AND-120A.PDF
ARCHIVED--SINGLE-RACK-MOUNT-KIT-FOR-GPIB-100A-110-AND-120A.PDF
FUSE-REPLACEMENT-ON-VOLTAGE-SELECTABLE-POWER-ENTRY-MODULE-NOTE-TO-USERS.PDF
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