8-Slot NI PXIe-1082 Backplane Installation Guide
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PXI Local Bus
The PXI backplane local bus is a daisy-chained bus that connects each
peripheral slot with adjacent peripheral slots to the left and right.
The backplane routes PXI Local Bus 6 between adjacent PXI slots. The left
local bus 6 from slot 1 is not routed anywhere, and the right local bus signal
from slot 18 is not routed anywhere.
Local bus signals may range from high-speed TTL signals to analog signals
as high as 42 V.
Initialization software uses the configuration information specific to each
adjacent peripheral module to evaluate local bus compatibility.
PXI Trigger Bus
All slots on the same PXI bus segment share eight PXI trigger lines. You
can use these trigger lines in a variety of ways. For example, you can use
triggers to synchronize the operation of several different PXI peripheral
modules. In other applications, one module in the system timing slot can
control carefully timed sequences of operations performed on other
modules in the system. Modules can pass triggers to one another, allowing
precisely timed responses to asynchronous external events the system is
monitoring or controlling. Figure 4 shows the PXI trigger bus connectivity.
Figure 4.
PXI Trigger Bus Connectivity Diagram
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PXI Trigger Bus
