SCXI 1520 Simultaneously sampling

[metrisys]

Hi there,

for my application i need to read simultaneously all the channels from 2 SCXI 1520 modules. (2 x 8 = 16 channels)

The control module will be SXCI 1600 and the  software  -  Signal Express. Is this possible ?

[metrisys]

........probably this is not possible. From what i've found on NI site, 2 SCXI 1520 modules should run in Parallel mode and each of them requires a separate DAQ board .

DAQ boards can be synchronised through a single RTSI cable. Any suggestions about the synchronization of the DAQ boards in Signal Express ?

[Wallace_F]

Hello metrisys,

I believe that it is possible to simultaneously sample from analog input channels on two SCXI-1520 modules that are controlled with the SCXI-1600.  PFI 0 of the SCXI-1600 is used to transmit the signal that triggers an acquisition for the SCXI-1520s.  You would need to configure the acquisition to recognize the signal from PFI 0 of the SCXI-1600 as the start trigger, and add all of the channels on the two SCXI-1520s to the scan list of your analog input task. For your convenience I've posted a link to a knowledge base article titled 'Synchronizing Multiple SCXI Simultaneous Sample-and-Hold (SSH) Modules.'  

 http://digital.ni.com/public.nsf/allkb/A01F8168AFCFE9DC86256B3300758CD0?OpenDocument

Best wishes,

Wallace F.