© National Instruments Corporation 8-1 E Series User Manual
8
Real-Time System Integration
Bus (RTSI)
NI-DAQ devices use the Real-Time System Integration (RTSI) bus to
easily synchronize several measurement functions to a common trigger or
timing event. In a PCI system, the RTSI bus consists of the RTSI bus
interface and a ribbon cable. The bus can route timing and trigger signals
between several functions 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 signals on the PXI backplane. This bus can route timing
and trigger signals between several functions on as many as seven DAQ
devices in the system. Refer to the KnowledgeBase document, RTSI
Connector Pinout, for more information.
Note DAQCard and DAQPad devices do not use the RTSI bus.
RTSI Triggers
The seven RTSI trigger lines on the RTSI bus provide a flexible
interconnection scheme for any E Series device sharing the RTSI bus.
These bidirectional lines can drive or receive any of the timing and
triggering signals directly to or from the trigger bus.
PCI E Series Devices
This signal connection scheme for PCI E Series devices is shown in
Figure 8-1.
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