Fastest update rate for USB-6509?

[BobGalejs]

I am looking into purchasing a USB-6509 but can't resolve a question about output data rates. The documentation for the USB-6509 doesn't seem to have any specifics on data rate limitations (at least that I could see).  I want to use all 96 output channels and toggle them 1 or 0 in a specified sequence.  I believe I can do this by loading an 8-bit number to each of the 12 ports.  Does anyone know how fast this toggling can occur?  Thanks!

[crossrulz]

The 6509 is a static DIO.  So the update rate is basically as fast as your software can update the values.  You cannot load digital waveforms into the device.  I would not expect to be able to update faster than 1ms at the best.  Take into account the USB latency and Windows randomly taking the CPU away from your application and it will be very inconsistent.

[BobGalejs]

Thanks for the information!  Millisecond scale updates are probably OK for now so I think I'll go ahead and buy it and see how fast we can get the software updates to go.

For future reference, is there another DIO device with as many channels that could update faster (doesn't have to be NI)?

Thanks again,

Bob

[crossrulz]

There are a few R series boards with that kind of line count, but they do require LabVIEW FPGA.

[Kevin_Price]

You could also just use the desktop PCIe-6509.  You'd still be stuck with the vagaries of Windows-based software timing, but your average and max update rates are likely to be noticeably faster than what you can get over USB.

-Kevin P