Modular Systems > National Instruments > Serial Interface Devices

PCI-485-4 Request for Availability

Q: What are the power requirements for the RS-422/485 PCI Card (PCI-485/4)?

The power requirements for the RS-422/485 PCI Card (PCI-485/4) are 700 mA typical current and 1300 mA maximum current at +5 VDC.

Q: Which type of I/O connector does the NI PCI-485/4 have?

The NI PCI-485/4 has 10-position jack I/O connectors.

PCI-485/4, 4-Port, Serial Interface Board

Rated 4.5/5 | 8 ratings

PCI-485/4 National Instruments Serial Interface | Apex Waves | Image

❮ ❯

Actual item may vary if no part number is provided on quote request.

✔ 2 Year Warranty Included

✔ Free Ground Shipping

✔ NIST Calibration Available

Anonymous 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

Please fill out the form below to send in your quote request and a representative will contact you with a formal quote. View blog post on Model Name vs. Part Numbers

Name*

Email Address*

Model Name

Part Number

Qty

+Add more parts

Additional Info - Calibration, Expedited Shipping or Other Notes

Avg. Response Time: 15 min

Prefer to send a text message?

Text your name, e-mail, and parts to quote to: 1-919-809-5227

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 PCI-485/4 Serial Interface

The PCI-485/4 (Part number: 777641-04) cards bolster RS485 interchanges and furthermore utilize differential adjusted drivers for long range and high noise insusceptibility. RS485 activity includes switchable handsets and the capacity to help different gadgets on a solitary "party line". The RS485 characterizes 32 gadgets maximum on a single line. The quantity of gadgets served on a single line can be extended by the utilization of "repeaters". RS485 communications require that one transmitter supply a predisposition voltage to guarantee a known "zero" state when all transmitters are off. Likewise, collector contributions at each finish of the system ought to be ended to wipe out "ringing". The card bolsters biasing as a matter of course and backings end by jumpers on the card.

In RS485 communications, the driver must be empowered and debilitated as required, enabling all cards to share a two wire link. The card controls the driver naturally. With programmed control, the driver is empowered when information is prepared to be transmitted. The driver remains empowered for one extra character's transmission time after information exchange is finished and is debilitated. The collector is regularly empowered, then incapacitated amid RS485 transmissions, and afterward re-empowered after transmission is finished (in addition to one character transmission time). The card consequently modifies its planning to the baud rate of the information.

The NI PCI-485/4 comes with I/O Connection: 9-stick male D-sub connectors, two shielded male D-sub 9-stick IBM AT style connectors compatible with RS-232(PCI-COM2S), RS-422 and RS-485 interfaces, a character length of 5, 6, 7, or 8 bits, and a parity (even, odd or none).

PCI-485/4 Obsolete Status has been announced by National Instruments, but it will still be available for purchase and repairs by Apex Waves.

Model	PCI-485/4
Manufacturer	National Instruments
Part Number	777641-04
Type	Serial Interface
Ports	4
Maximum Transfer Rate	460.8 kb/s
FIFO Size	64 Bytes
Dimensions	4.2 x 5.8 in.
I/O Connector	10-position jack
Warranty	2-3 Year Warranty
PCI-485/4 Manual	User Manual and Maintenance Manual Available for Download
Price	Contact a sales representative for a quote.