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Can the PXI-40xx be Used to Control SCXI in a Combo Chassis?

Hardware: Modular Instruments>>Digital Multimeters (DMM)>>PXI-4071, Modular Instruments>>Digital Multimeters (DMM)>>PXI-4072, Modular Instruments>>Digital Multimeters (DMM)>>PXI-4070

Problem:
I recently received a new NI PXI DMM and I am not able to configure the SCXI modules in my system using MAX.

Solution:
The PXI Systems Alliance (pxisa.org) recently defined a modification for PXI modules. Modified PXI modules provide future compatibility for systems incorporating PCI Express signaling in PXI. Previous versions of these modules had two large PXI connectors. In the modified PXI Express compatible DMM, the top connector has been replaced with a smaller connector. You may notice a series of regularly spaced holes in the printed circuit board that are not used by the smaller connector. As of August 2006, all PXI-407x devices ship as a PXI Express compatible DMM.

PXI Express compatible digital multimeters do not preserve the local bus communication ability. Systems currently using a local bus configuration such as PXI/SCXI combination chassis, will no longer be capable of SCXI control and triggering via the backplane using PXI Express compatible digital multimeters.

Workarounds:
PXI-1010, PXI-1050
In this instance, National Instruments recommends the NI SCXI-1357/1358/1359 High-Voltage Backplane Assembly Kit.

PXI-1011, PXI-1052
  1. Use separate PXI and SCXI chassis instead of a combo chassis.
  2. Use a PXI-1010/1050 rather than a PXI-1011/1052. Then the NI SCXI-1357/1358/1359 High-Voltage Backplane Assembly Kit can be used. This will reduce the available SCXI slots.
  3. Use another card that preserves the legacy PXI connector and is capable of controlling SCXI in the right-most slot such as a E/M series device. This will require one additional PXI slot.
  4. Use a DMM capable of controlling SCXI which retains the legacy PXI connector. Currently the PXI-4060 is the only device offered with this connector.


Related Links: KnowledgeBase 35SDNSNQ: Can I Do Hardware Handshaking with a PXI-4060 and SCXI Switch in a Combo Chassis?
KnowledgeBase 2WOHME6W: Can I Use a National Instruments DMM to Control an SCXI-1162/63 Module?

KnowledgeBase 459K5SLQ:Digital Multimeters with Switches in Large Chassis
KnowledgeBase 3M5CADQT: How Can I Control Multiple SCXI Switch Chassis With One DMM?


Attachments:


DMM eHM.bmp

Report Date: 02/26/2007
Last Updated: 05/10/2007
Document ID: 46PDM1PC

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