Chapter 2 PXI-1006 Features
PXI-1006 User 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 Trigger Slot
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
functionality because there are 13 Star Trigger lines, as specified in the PXI
specification (see Figure 2-3). This slot is intended for modules with ST
functionality thatcan provide individual triggers tothe peripherals installed
in slots3-15. However, ifyou do notrequire advanced triggerfunctionality,
you can install any standard peripheral module into this slot.
Peripheral Slots
There are 17 peripheral slots including the Star Trigger controller slot.
Local Bus
The PXI backplane’s local bus is a daisy-chained bus that connects each
peripheral slot with its adjacent peripheral slots to the left and right, as
shown in Figure 2-3.
For example, a given peripheral slot’s right local bus connects to the
adjacent slot’s left local bus, and so on. Each local bus is 13 lines wide and
can pass analog signals between cards or provide a high-speed side-band
communication path that does not affect the PXI bandwidth.
The PXI-1006 has local bus connections between all slots except slots 1
and 2, in accordance with the PXI specification. See Figure 2-3 for details.
