Anonymous Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
USB-6501
USB-6501, 24 Bidirectional Channels, 8.5 mA Current Drive, Digital I/O Device
Actual item may vary if no part number is provided on quote request.
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Expert Insights for the USB-6501
"The portable USB-6501 is a low-cost digital I/O device that is USB powered. It is ideal for home use, yet is powerful enough for industrial or laboratory applications. It is the perfect device for learning as the configuration is simple and supports plug and play with the NI-DAQmx driver. Its small size allows for travel or to fit into tight spaces!"
- Chris B.
LabVIEW Trained
In-House Technician
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
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
Expert Insights for the USB-6501
"The portable USB-6501 is a low-cost digital I/O device that is USB powered. It is ideal for home use, yet is powerful enough for industrial or laboratory applications. It is the perfect device for learning as the configuration is simple and supports plug and play with the NI-DAQmx driver. Its small size allows for travel or to fit into tight spaces!"
- Chris B.
LabVIEW Trained
In-House Technician
National Instruments USB-6501 Digital I/O Device
The NI USB-6501 (Part Number: 779205-01, 192317-50, 780118-01, 192317E-50L (OEM)) is a small, portable Digital I/O Device. The standard version of the USB-6501 DAQ comes with two connector plugs for digital signals that have screw terminals. All of the screw terminals of the plugs are detachable, and are compatible with a range from 16 AWG to 28 AWG. The OEM version of the device utilizes a 34-pin ribbon cable for connectivity. Part numbers 779205-01 and 780118-01 represent the standard version of the device, the difference being that the latter is programmable. Part number 192317-50 is for the board only, OEM version of the USB-6501.
The USB-6501 incorporates USB cable strain relief and an LED indicator. The LED indicator utilizes green to show the device status. This LED indicator indicates the working status of the device in three different ways. If this LED is not lit, then the device is either disconnected or in suspend mode. The LED does not give light when the Digital I/O Device is in suspended mode. The light is ON without blinking when the NI USB-6501 is connected in standby mode—this shows that the device has not been initialized yet. The LED gives a single blink when the device is working normally.
The National Instruments USB-6501 provides protection against different voltage malfunctions. These malfunctions include overvoltage conditions. They also incorporate conditions of under-voltage and conditions of over-current. The user can avoid these conditions if they follow the instructions mentioned in the user manual. This device provides a small voltage of 5 V through two pins. This voltage can vary from system to system.
This device has 24 Digital Input/Output lines. The USB-6501 24-Channel Digital I/O Device has an open collector default configuration for the DIO ports. An external pull-up resistor provided by the user can be added to increase the source current drive to an 8.5 mA limit for each line. The device has a USB 2.0 bus connector, and has a digital input voltage range of -0.3 V to 5.8 V. This Digital I/O Device also includes 1 counter/timer with 32-bits resolution. The USB-6501 offers a transfer rate of 12 Mbit/s. The Instrument is run using the NIDAQmx driver software which is compatible with software packages or application development environments like LabVIEW and LabWIndows/CVI.
Without including the connectors, the USB-6501 measures physical dimensions 2.50 in. × 3.35 in. × 0.91 in. (6.35 cm × 8.51 cm × 2.31 cm). With connectors included, the dimensions measure 3.22 in. × 3.35 in. × 0.91 in. (8.18 cm × 8.51 cm × 2.31 cm). The NI device weighs 3 oz (84 g),
| Model | USB-6501 |
|---|---|
| Manufacturer | National Instruments |
| Part Number | 779205-01, 192317-50, 780118-01, 192317E-50L (OEM) |
| Type | Digital I/O Device |
| Bidirectional Digital Channels | 24 |
| Bus Connector | USB 2.0 |
| Digital Input Voltage Range | -0.3 V to 5.8 V |
| I/O Connectors | Two 16-Position Screw Terminal Plug Headers |
| USB Specification | USB 2.0 Full Speed |
| Counter Resolution | 32 Bits |
| USB Input Voltage | 4.50 VDC to 5.25 VDC |
| Operating Temp Range | 0 °C to 55 °C |
| Storage Temp Range | -40 °C to 85 °C |
| Dimensions | Without Connectors: 2.50 in. × 3.35 in. × 0.91 in. (6.35 cm × 8.51 cm × 2.31 cm) With Connectors: 3.22 in. × 3.35 in. × 0.91 in. (8.18 cm × 8.51 cm × 2.31 cm) |
| Weight | 3 oz. (84 g) |
| USB-6501 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Request a Quote for Pricing |
Associated part numbers for USB-6501:
National Instruments USB-6501 Frequently Asked Questions
Question: What is the output voltage range of the NI USB-6501?
Answer: The output voltage range is 0 V to 5 V.
Question: What are the dimensions of the NI USB-6501?
Answer: Without connectors, the dimensions measure 2.50 in. × 3.35 in. × 0.91 in. With connectors included, the dimensions are 3.22 in. × 3.35 in. × 0.91 in.
Question: What type of I/O connectors does the USB-6501 have?
Answer: The Digital I/O Device has 16-position (screw terminal) plug headers.
Question: What is the power-on state of the USB-6501?
Answer: The power-on state of the DAQ is Input (high impedance).
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