The National Instruments PXI-8423/2 provides two isolated RS-485/RS-422 serial ports in a PXI module, with male DB-9 connections.
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Key product information and technical features.
This module belongs to NI’s PXI serial hardware family. Its isolated ports address serial communication where ground-level differences or electrical noise are concerns.
Verified product specifications.
| Port count | 2 ports |
|---|---|
| Connector | DB-9 male |
| Continuous isolation, port-to-port and port-to-host | 60 VDC, CAT I |
| Isolation withstand, port-to-port and port-to-host | 2000 Vrms; 5-second dielectric withstand test |
| Supply requirement | +5 VDC; 800 mA typical, 1.3 A maximum |
| Board dimensions | 100 × 160 mm |
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Manufacturer
Hardware platform
Isolated serial interface
Supports two- and four-wire RS-485 devices through hardware transceiver control modes.
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Product-specific answers based on available technical information.
Yes. NI documents RS-422 and RS-485 support.
No. The 2000 Vrms rating is a 5-second withstand test; continuous isolation is 60 VDC, CAT I.