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July 2025
AT-232-4
AT-232/4, 4-Port, Serial Interface Card
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
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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
" 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 AT-232/4 Serial Interface
The NI AT-232/4 is a 4-port serial interface. The AT-232/4 is manufactured by National Instruments. The part number of the NI AT-232/4 is 777312-04.
A serial interface enables the user to connect and control external serial hardware, e.g., terminals, modems, and various other devices using asynchronous serial interfaces which support a variety of protocols. Modern serial interface cards have less fault rates, consume less power, and have high data rates.
The NI AT-232/4 Serial Interface can be used as a plug-in card which connects any computer to other serial devices. Each port connects the host equipment to the DTE (Data Terminal Equipment) or DCE (Data Communication Equipment) via registered jacks (RJ45) or modular phone jacks (10-position). The AT-232/4 is compatible with Windows 2000/9x. The AT-232/4 also interrupts sharing between the ports. This serial interface offers an optimum current range of 340 mA to 450 mA at 5V.
A Recommended Standard 232 (RS-232) interface can be used to run the AT-232/4 adapter. To certify error-free decoding of the data at the receiver’s side, the AT-232/4 includes RTS/CTS hardware-handshake lines. The AT-232/4 can be powered on via a USB port; therefore, it doesn’t require any external power. The NI AT-232/4 enables bi-directional data transfer by providing a full-duplex RS-232 port. ISA (Industry Standard Architecture) bus connects to the AT-232/4 adapter. The AT-232/4 has FIFO depth/size of 16B which implies the requirement of 16B of data for buffering. The humidity operating range of the NI AT-232/4 is 10% to 90%.
| Model | AT-232-4 |
|---|---|
| Manufacturer | National Instruments |
| Part Number | 777312-04 |
| Type | Serial Interface Card |
| Data Transfer Rate | 115.2 kbps |
| Data Link Protocol | RS-232 |
| Number of Ports | 4 |
| Current Range at 5V | 340 mA - 450 mA |
| Humidity Range Operating | 10 - 90% |
| Height | 4.2 in. |
| Depth | 6.5 in. |
| AT-232/4 Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
Associated part numbers for AT-232-4:
National Instruments AT-232/4 Frequently Asked Questions
Question: Is the NI AT-232/4 an isolated serial interface?
Answer: There are versions of the NI AT-232/4 that are isolated and non-isolated.
Question: What is the FIFO size of the AT-232/4?
Answer: The FIFO size of the AT-232/4 is 16 B.
Question: What are the power requirements of the NI AT-232/4?
Answer: The power requirements of the NI AT-232/4 are +5 VDC; 110 mA typical, 150 mA maximum.
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