I am interested in using LabVIEW RT for a project I have in mind. However, this project requires four analog voltage outputs (all running in synchronisation). The new RT DAQ boards have only two AO on them. Does this mean I would have to buy two RT DAQ boards. Or can a normal DAQ board be linked to, and controlled by, one RT board? Thus reducing the cost and complexity.
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Unfortunately there are only 2 analog outputs presently on the RT Series DAQ devices. It is possible to synchronize 2 additional analog outputs on a non-RT series DAQ device (i.e. a standard e-series DAQ board for example) through the real-time system integration (RTSI) bus. The difficulty with this approach is the RT Series DAQ device can not directly control the non-RT DAQ device. The analog output operations would have to be started from a HOST LabVIEW application. As long as the analog output operation is dependent on an external clock coming from the RTSI bus the operation will not begin until the RT DAQ device sends it's update clock over the RTSI bus. Once the RT Series DAQ device starts is analog output operation and puts it's update clock on the RTSI bus the fou r analog outputs will then be synchronized. One more detail, the data coming from the non-RT series DAQ device will only be available on in the HOST LabVIEW application. The RT DAQ device will not be able to update the data for the analog outputs on the non-RT DAQ device in realtime. This may or may not be relevent for your system.
Another alternative would be to use the SCXI-1124 extension to the RT Series DAQ device. This would provide sufficient analog output channel count for you but the cost is more.
National Instruments is looking into additional RT DAQ devices that will provide more analog output capabilities but no products have been announced at this time.
email@example.com wrote: >I am interested in using LabVIEW RT for a project I have in mind.>However, this project requires four analog voltage outputs (all running>in synchronisation). The new RT DAQ boards have only two AO on them.>Does this mean I would have to buy two RT DAQ boards. Or can a normal>DAQ board be linked to, and controlled by, one RT board? Thus reducing>the cost and complexity.>>>Sent via Deja.com http://www.deja.com/>Before you buy.