Chapter2 PXI-1006Features
PXI-1006User Manual 2-4 ni.com
System Controller Slot
The System Controller slot is Slot 1 of the chassis as defined by the PXI
specification.It has three controller expansion slots, which are used for
system controller modules that are wider than one slot. As defined in the
PXI specification, these slots allow the controller to expand to the left to
prevent the controller from using up peripheral slots.
Star TriggerSlot
The Star Trigger (ST) slot is Slot 2. This slot has a dedicated trigger line
between itself and slots 3-15. Slots 16-18 do not use the Star Trigger
functionalitybecause there are 13 Star Trigger lines, as specified in th e PXI
specification (see Figure 2-3).This slot is intended for modules with ST
functionalitythat can provide individual triggers to the peripherals installed
inslots 3-15. However, if you do not require advanced trigger functionality ,
you can installa ny standard peripheralmodule intothis slot.
Peripheral Slots
There are 17 peripheral slots including the Star Trigger controller slot.
Local Bus
The PXI backplane’s local busis a daisy-chained bus that connects each
peripherals lot with itsadjacent peripheral slots tothe left and right,as
shown in Figure 2-3.
Forexample, a given peripheral slot’s right local bus connects to the
adjacentslot’s left local bus, and so on. Each local bus is 13 lines wide and
can passanalog signals between cards or provide a high-speed side-band
communication paththat does not affect the PXI bandwidth.
The PXI-1006has localbus connections between all slots except slots 1
and 2, inaccordance withthe PXI specification. See Figure 2-3 for details.