Chapter 4 Understanding the VXI-1200
© National Instruments Corporation
4-3
VXI-1200 User Manual
Backplane
The backplane serves several functions.
•
Accommodates up to six C-size VXI modules and up to three
B-size VXI or VME modules. The plug-in Personality module
allows either the C0 slot or B0 slot to function as the mainframe
VXIbus Slot 0 location.
•
Accommodates a lifetime of insertions of VXI modules and the
plug-in power supply.
•
Supplies DC voltages and currents to modules.
•
Connects the VME communications interface across P1 and P2 to
all slots.
•
Connects the VXI extensions across P2 rows a and c to all slots.
There is no VXI local bus connection between B-size and C-size
slots.
•
Connects the Power On/Standby switch and module cooling fans
with the power supply.
Backplane Interconnections
The Power On/Standby switch (S100) connects to the backplane
through a polarized locking wire-to-board header at J54.
The module cooling fans connect to the backplane through a polarized
locking wire-to-board header at J56.
The power supply mates with the backplane through board-to-board
connector J52.