The National Instruments PXI-8420/4 adds four RS-232 serial ports to a PXI system. Its 16550-compatible UART architecture supports standard PC COM-port operation.
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Key product information and technical features.
The PXI-8420/4 is the four-port member of NI's PXI-8420 RS-232 family. It provides serial communication through the PXI platform rather than an external serial adapter.
NI documents standard PC COM-port compatibility, FIFO buffering, and Plug and Play configuration for this serial hardware. Software planning is important: NI-Serial 17.0 removed support for the PXI-8420 family.
Verified product specifications.
| Platform | PXI |
|---|---|
| Serial standard | RS-232 |
| Number of ports | 4 ports |
| Maximum baud rate | 115.2 kbaud |
| I/O connector type | 10-position modular jack (10P10C) |
| FIFO size | 64 bytes |
| Isolation | None |
| Board dimensions | 100 × 160 mm |
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Manufacturer
Hardware platform
Four-port RS-232 interface
NI-Serial 17.0 removed PXI-8420 support.
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Product-specific answers based on available technical information.
No. It is an RS-232 interface; NI identifies the PXI-8421 family as the corresponding RS-485/RS-422 hardware.
No. NI explicitly removed PXI-8420 support in NI-Serial 17.0. Verify an earlier driver's hardware and operating-system support before selecting software.
NI specifies a cable converting its 10P10C modular connection to DB-9 or DB-25 male connectors. Confirm the required cable separately; inclusion is not established by this catalog record.