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PXIe 2593-Relays are not responding

I tried all of connection pairs in Dual 8x1 mutliplexer topology(and in other defined topologies) and could not hear any relay clicking.

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Message 11 of 17
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Ok, great.

 

That definitely leans to one of three things:

1. Ribbon Cable is out

2. PXI hardware issue, test by moving the switch module to another slot of your chassis.

3. Software driver issue, test by moving the switch module to another chassis with a different controller.

 

It is extremely unlikely (impossible) for all of the relays on the module to fail at the same time. The three items above are the most likely candidates that you should look into.

Eric S.
AE Specialist | Global Support
National Instruments
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Message 12 of 17
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Actually, we have problems with identification of controller and chassis. we use PXIe 8370 controller and PXIe 1075 chassis. although we can see PXIe 5122 and PXIe 2593 in MAX, we  cannot identify controller and chassis(both automatically and manually). may this cause our 2593 problem?

 

I will try your suggestions as soon as possible and will inform you about news.

 

Thank you.

 

Ali 

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Message 13 of 17
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Hi Ali,

 

The chassis ID issues could be causing some trouble.  When you try and identify manually, do the model numbers appear in the list?  

This developer zone article explains how chassis are identified and why.

 

Do you get a chassis identified message but with a warning?

This is a KnowledgeBase on how to fix this.

 

What version of PXI platform services are you using?  (MAX » My System » Software)

Andy K.
Applications Engineer
National Instruments
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Message 14 of 17
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Hi Ali,

 

Have you specified your connection as "External PC"?  Since you are using MXI (the 8370 is a MXI-express controller for PXIe), you must specify in MAX that the controller is "External PC".  This is because your desktop computer is the remote controller for the PXI system, as opposed to an embedded controller like the NI PXIe-8133.  

 

Once you configure your PXI System as "External PC", the 1075 chassis should automatically be detected. In fact, if it is not automatically detected there is nothing you can do.  The link that Andy refered us to is only valid for PXI chassis, not PXIe chassis.  The best thing is to make sure your DAQmx version is up to date (NI-DAQmx 9.4 is the most recent).

 

 

For an explanation of how to set your PXI System for "External PC", see the knowledgebase PXI Chassis Does Not Appear in Measurement & Automation Explorer (MAX)

 

Any updates about the 2593?

Eric S.
AE Specialist | Global Support
National Instruments
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Message 15 of 17
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we can identify 8370 as an external pc but PXIe-1075 is not shown up in chassis identification list. when we click "other" on the list we can manually find NI PXIe 1075.ini file in installation folder and when we try to identify via that file MAX gives an error saying "this is not a valid chassis.ini file..."

 

updates about 2593 as follows:

 

-we checked ribbon cable it seems connected properly.

-we changed slot of the switch

 

but relays did not respond in both cases.

 

 

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Message 16 of 17
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It would be really great if you could place another NI switch module in the chassis to test the functionality.  If you don't have another switch module, this is obviously not possible, but it would greatly reduce the number of possible failure mode paths.

 

If the 2593 previously worked without issues and then one day stopped working without any changes to the SW, yet still appears to work in SW, then I would lean towards the thought that there is a HW issue on the 2593 that is preventing the 2593's digital board from communicating with the 2593 relay daughtercard. While the incorrect chassis.ini file is defintely something to look into, I do not believe it is interfering with the computer's ability to control the switch module; it sounds like the commands are making it to the switch module from my cursory understanding of the situation.  

 

Unfortunately, without another test system or switch module, the best method might be to send in the 2593 module for RMA repair.  If you know of any other PXI chassis or NI switch modules that you can use, I highly recommend swapping HW first, to make sure the module is in fact nonfunctional.  You should also try disconnecting and reconnecting the ribbon cable between the two PCBs (as Eric illustrated above) to make sure the connection is snug.  If none of this works, the next best option is going to be to send the module in and have us take a look at it.  Sorry I don't have better news; hopefully some of the troubleshooting steps above resolve the issue.

-John Sullivan
Problem Solver
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Message 17 of 17
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