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GPIB-485CT-A
GPIB-485-CT-A, 256 KB RAM buffer, GPIB-to-RS485 Controller
Actual item may vary if no part number is provided on quote request.
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March 2025
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January 2025
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" 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
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January 2025
National Instruments GPIB-485CT-A GPIB Serial Controller
The NI GPIB-485CT-A (Part Numbers: 777146-01, 777146-02, 777146-03, 777146-04, 777146-05, 777146-06, 777147-01, 777147-31, 777148-01, 777148-02, 777148-03, 777148-04, 777148-05, 777148-06, 777149-01, and 777149-31) offers RS-485 serial connections and can turn a regular PC into a fully functional IEEE 488.2 Controller. The RS-485 port on the NI GPIB-485CT-A utilizes a 9-pin shielded, standard D-sub male connector.
The RS-485 connector couples with standard D-sub 9-pin female connectors. The GPIB connector used in this device is a 24-pin, standard female connector with screw lock hardware. The two connectors are provided on opposite side panels of the device. Like its predecessors, the GPIB-485CT-A is offered in AC and DC versions. The AC version comes with a power cord receptacle mounted on the front panel, whereas a DC power jack is provided on the DC version.
This GPIB Serial Controller can be configured to operate in G or S mode. For mode configuration, data format, baud rate, and GPIB address, DIP switches are provided on the device’s rear panel. Users who want to utilize this device solely as a listener and talker should use G mode. However, those who wish to operate their NI GPIB-485CT-A as a GPIB Controller should configure it for S mode operation.
This device comes featured with various controller capabilities. Thus, it can accept data continuously from the GPIB or serial port even when the other port is busy. Moreover, it can handle both the requested and continuous types of error and status reporting in either numeric or symbol form. The GPIB-485CT-A supports XON/XOFF and hardware handshake communication protocols.
| Model | GPIB-485CT-A |
|---|---|
| Manufacturer | National Instruments |
| Part Numbers | 777146-01, 777146-02, 777146-03, 777146-04, 777146-05, 777146-06, 777147-01, 777147-31, 777148-01, 777148-02, 777148-03, 777148-04, 777148-05, 777148-06, 777149-01, 777149-31 |
| Type | GPIB Serial Controller |
| RS485 Data Transfer Rates | up to 38.4 kb/s |
| RAM Buffer | 256 KB |
| Driver | NI-488.2 for Windows 3.1/DOS |
| Dimensions | AC Version: 3.0 by 1.7 by 4.7 in. DC Version: 3.0 by 1.1 by 4.7 in. |
| Weight | 12 oz. |
| GPIB-485CT-A Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
Associated part numbers for GPIB-485CT-A:
National Instruments GPIB-485CT-A Frequently Asked Questions
Question: What are the differences between the numerous part numbers for the GPIB-485CT-A?
Answer: The GPIB-485CT-A has both AC and DC versions, as well as a version with just the GPIB-485CT-A controller and another with the NI-488.2 for Windows 3.1/DOS included. The AC version with just the controller comes with a power cord for U.S. 120 VAC (Part Number: 777146-01), Swiss 220 VAC (Part Number: 777146-02), Australia 240 VAC (Part Number: 777146-03), Universal Euro 240 VAC (Part Number: 777146-04), North America 240 VAC (Part Number: 777146-05), or United Kingdom 240 VAC (Part Number: 777146-06). The DC version with only the controller has either a 115 VAC Power Supply (Part Number: 777147-01) or a 230 VAC Power Supply (Part Number: 777147-31). The AC version with NI-488.2 for Windows 3.1/DOS comes with a power cord for U.S. 120 VAC (Part Number: 777148-01), Swiss 220 VAC (Part Number: 777148-02), Australia 240 VAC (Part Number: 777148-03), Universal Euro 240 VAC (Part Number: 777148-04), North America 240 VAC (Part Number: 777148-05), or United Kingdom 240 VAC (Part Number: 777148-06). The DC version with NI-488.2 for Windows 3.1/DOS comes with either a 115 VAC Power Supply (Part Number: 777149-01) or a 230 VAC Power Supply (Part Number: 777149-31).
Question: What are the power requirements for the NI GPIB-485CT-A?
Answer: The NI GPIB-485CT-A requires 5 VA at 100 to 120 ±10% VAC and 220 to 240 ±10% VAC for the AC version (50 to 60 Hz). However, the DC version requires 700 mA at 5 to 13 VDC.
Question: Which type of I/O connectors does the National Instruments GPIB-485CT-A have?
Answer: The National Instruments GPIB-485CT-A has an IEEE 488 standard 24-pin GPIB port and a standard 9-pin male D-Sub serial port.
Question: What is the difference between the GPIB-232CT-A and the GPIB-485CT-A?
Answer: The GPIB-485CT-A is designed for RS-485 serial connections, while the GPIB-232CT-A is designed for RS-232 serial connections.
GPIB-485CT-A PDF Manuals
ARCHIVED--GETTING-STARTED-WITH-LABWINDOWS-CVI.PDF
ARCHIVED--GETTING-STARTED-WITH-MEASUREMENT-STUDIO-LABWINDOWS-CVI.PDF
ARCHIVED--GPIB-232-485CT-A-USER-MANUAL-AND-SPECIFICATIONS.PDF
ARCHIVED--LABVIEW-FUNCTION-AND-VI-REFERENCE-MANUAL.PDF
ARCHIVED--LABVIEW-USER-MANUAL.PDF
ARCHIVED--USING-YOUR-NI-488.2-SOFTWARE-FOR-DOS-OR-WINDOWS-3-WITH-WINDOWS-95-98.PDF
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