ADLINK PXIS-2700 - Manual (Page 16)

10 ● Backplane Overview
3.4 Peripheral Slots
There are 17 peripheral slots including the Star Trigger controller slot.
3.5 Local Bus
The local bus of PXI backplane cBX-3018L is a daisy-chained bus that
connects each peripheral slot with its adjacent peripheral slots to the left
and right. Each local bus is 13 lines wide and can pass analog signals
between modules or provide a high-speed side-band communication path
that does not affect the PXI bandwidth.
In accordance with the PXI specification, the local bus connections
between all slots except slots 1 and 2.
3.6 Trigger Bus
ADLINK PXIS-2700 has three PXI separate trigger bus segments. The
PXI trigger bus is divided into three separate trigger bus at these locations.
The trigger bus divisions represented by vertical bars on the front of the
chassis. You can use triggers to synchronize the operation of several
different PXI peripheral modules, or use one module to control carefully
timed sequences of operations performed on other modules in the system.
Modules can pass triggers to one another through trigger bus, allowing
precisely timed responses to asynchronous external events the system is
monitoring or controlling.