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July 2025
USB-232-4
USB-232/4, 4-Port, USB 2.0 Bus Connector, Serial Interface Device
Actual item may vary if no part number is provided on quote request.
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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
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 USB-232/4 Serial Interface Device
The NI USB-232/4 (Part Number: 778473-04) is a 4-Port Serial Interface Device. This device is designed to transform a standard USB port into 4 standard serial ports. The USB 2.0 connector on this device is a B-type plug. The four serial ports can be accessed through separate DB-9 male connectors. This Serial Interface Device is bus-powered and relies on the power supplied by the USB serial bus. Thus, you are not required to acquire an additional power supply to operate your NI USB-232/4. You can use this device with a broad range of computer programs and applications that use standard COM ports.
The National Instruments USB-232/4 Serial Interface Device is designed to be hosted by a regular personal computer operating on Microsoft Windows. In the Windows environment, this device appears like a hardware serial communication port. The front panel of the NI USB-232/4 has various LEDs to keep you informed and updated about the current state of the device on a real-time basis. The solid and robust casing of this Serial Interface Device enables it to operate in typical industrial environments and in conditions where the regular cable-only type of interfaces does not last long. The USB-232/4 Serial Interface Device is known for its reliable performance and accuracy. Moreover, you can choose to operate this device in either DCE or DTE mode through software. In typical conditions, the NI USB-232/4 draws around 300 mA of current from its host USB bus, and up to 500 mA at +5 VDC. Since it is a USB powered device, it does not come with a separate power cable or power jack.
The NI device weighs 0.83 lb, and measures 8.3 x 4.9 x 1.4 in. in physical dimensions. It has recommended operating and storage temperature ranges of 0 to 70 °C and –40 to 85 °C respectively, non-condensing operating and storage humidity ranges of 10% to 90% RH and 5% to 95% RH respectively. The USB-232/4 is designed to comply with the following electrical and electromagnetic safety standards: IEC 61010-1, EN 61010-1, UL 61010-1, CSA 61010-1, EN 61326 (IEC 61326), AS/NZS CISPR 11.
| Model | USB-232-4 |
|---|---|
| Manufacturer | National Instruments |
| Part Number | 778473-04 |
| Type | Serial Interface Device |
| Ports | 4 |
| Supported Serial Protocols | RS232 |
| Bus Connector | USB 2.0 |
| Dimensions | 8.3 × 4.9 × 1.4 in. |
| Weight | 0.83 lb. |
| USB-232/4 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
Associated part numbers for USB-232-4:
National Instruments USB-232/4 Frequently Asked Questions
Question: What is the Max Baud of the USB-232/4?
Answer: The Max Baud of the USB-232/4 is 230.4 kbaud
Question: What type of connector does the USB-232/4 have?
Answer: The USB-232/4 has a DB-9 male connector
Question: What is the FIFO Size of the USB-232/4?
Answer: The USB-232/4 has a FIFO size of 128 bytes.
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