The National Instruments PXI-4021 is a PXI switch controller for SCXI-based switching systems. It provides SCXI control communication rather than scan-trigger generation.
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Key product information and technical features.
In an SCXI scanning system, the controller communicates switch settings and downloads scan lists. The PXI-4021 performs this control role; a separate measurement device advances the scan through triggers.
NI also documents PXI-4021 local-bus control of the SCXI section in PXI-101x combination chassis when installed in the rightmost PXI slot.
Verified product specifications.
| Host platform | PXI |
|---|---|
| AUX connector | 9-pin round mini-DIN |
| Scan-trigger generation | Not supported |
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Manufacturer
Host platform
SCXI switch controller
The adapter installation guide describes selecting NI 4021 as the chassis communicator in MAX.
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Product-specific answers based on available technical information.
No. NI specifies that the NI 4021 provides switch control only. A separate triggering device, such as an NI DMM, is required for triggered scanning.
Yes. The NI 4021 installation guide lists NI-SWITCH software among the required system components.
The guide specifies an SH9MD-9MD cable between the controller AUX connector and the SCXI adapter AUX IN connector. This does not establish which accessories accompany this catalog item.