pci 6225 and scb 68 connector block

[arool]

As a part of my project , i need to connect 48 analog inputs to the labview program which collects information from sensors. I have a pci 6225 card and two SCB-68 connector blocks with SHC-68 EPM connecting cables. I used to do 32 channel inputs using these devices. Now i wanted to extend it to 48 inputs and use the same devices. Is there a posiibility that i could do it?  Can i connect more than 16 analog inputs in a single SCB-68 block.  Do i have to do it single ended or differential? If not, wht connector box should i get to make 48 iinputs to the PCI 6225?

[TV_Enable]

Hi,

Thank you for your question.  Absolutely, you can do what you want to do with the hardware you have.  The PCI-6225 has 80 analog inputs.  Using two SHC-68 EPM cables and two SCB-68 you can acquire data for all 80 analog input channels.  You don't necessarily use differential or single-ended, although differential is almost always preferred.  For more information on this consult the Developer Zone article here.  Whichever one you choose, you can use the connection diagram in Measurement & Automation Explorer (MAX) to see exactly how you need to connect your device.  I hope this helps.  Let me know if you have any questions.

Have a great day!

Todd V.

[arool]

Thank you very much. I just have one more question. The PCI 6225 specifications says i need to use two different cables (SHC 68-68 EPM for connector 0 and SHC 68-68 for connector 1)  to the SCB 68 connector blocks. As i have two SHC 68-68 EPM already, can i use it instead of SHC 68-68 for connector 1 or do i have to order a new cable for it?

Also this link was helpful to find the refernce lables for  SCB 68(with PCI 6225).

http://digital.ni.com/public.nsf/allkb/F011AD8B0F4BD35086257050006CBB70

Thank you,

-Arool

[TV_Enable]

Hi,

Thanks for your quick reply.  The SHC68-68-EPM cable is specifically designed to work on connector 0.  I do not know that this cable won't work on connector 1 as well.  However, it is not designed for this.  According to page A-35 of the M-Series User Manual, different cables are required for both connectors.  This is what I would recommend in order for your device to work as it is designed to.  Please let me know if you have any further questions.

Have a great day!

Regards,

Todd V.