National Instruments NI 6711 User Manual

Also see for DAQCard-6715: User manual User manual

Contents

National Instruments NI 6711 User Manual Manual pdf 71 page image

© National Instruments Corporation 8-1 Analog Output Series User Manual8Real-Time System IntegrationBus (RTSI)NI-DAQ devices use the Real-Time System Integration (RTSI) bus to easilysynchronize several measurement functions to a common trigger or timingevent. In a PCI system, the RTSI bus consists of the RTSI bus interface anda ribbon cable. The bus can route timing and trigger signals between severalfunctions on as many as five DAQ devices in the computer. In a PXI system,the RTSI bus consists of the RTSI bus interface and the PXI trigger signalson the PXI backplane. This bus can route timing and trigger signalsbetween several functions on as many as seven DAQ devices in the system.Refer to the KnowledgeBase document, RTSI Connector Pinout, for moreinformation. To access this document, go to ni.com/info and enter theinfo code rdrtcp.Note The NI DAQCard-6715 does not use the RTSI bus.RTSI TriggersThe seven RTSI trigger lines on the RTSI bus provide a flexibleinterconnection scheme for devices sharing the RTSI bus. Thesebidirectional lines can drive or receive any of the timing and triggeringsignals shown below directly to or from the trigger bus.The RTSI trigger lines on PXI devices connect to other devices through thePXI bus on the PXI backplane. RTSI <0..5> connect to PXI Trigger <0..5>,respectively. The RTSI Clock is connected to PXI Trigger 7. In PXI, RTSI 6connects to the PXI star trigger line, allowing the device to receive triggersfrom any star trigger controller plugged into Slot 2 of the chassis. AO Seriesdevices can accept timing signals from the PXI star trigger line, but theycannot drive signals onto it. For more information on the star trigger, referto the PXI Hardware Specification Revision 2.1.