USING TWO PCI 6255

[ASIM_BHATTI]

HELLO every one

If i want to connect two(2) PCI 6255 DAQ's to sample 80 differential analog input signals and i want to read data using Microsoft Visual C++, is there any synchronization problem in this approach?does your API (provided with PCI 6255 card)  give the facility to connect more than one DAQ's?

[Speedy_Badger]

Hello ASIM_BHATTI,

Our DAQmx API is perfectly capable of controlling multiple DAQ devices. It will however by default be synchronized on a software basis. If you need accurate hardware synchronization you will need to share a timing signal. You can do this by using a RTSI connection between the two PCI devices. This gives you several lines which you can import/export timing signals between the two devices. You will need to purchase a RTSI cable in addition to the two devices in order to use this functionality.

For more information on RTSI cables and how they are used in DAQ applications, check out the following examples. The second one is similar to your application: using multiple DAQ boards to sample a large number of channels.

RTSI Bus Cables - Product Page

As always, post back if you have additional questions and we will help out where we can.

Regards,