Chapter 4 Understanding the VXI-1200
VXI-1200 User Manual
4-2
© National Instruments Corporation
Power Supply
The power supply accepts power from the AC mains and converts it to
DC to power the following components.
•
VXI modules installed into the backplane
•
Backplane terminations and daisy-chaining logic
•
Module cooling fans
Power Supply Interconnection
Power is supplied to the backplane through board-to-board connector
P52, eliminating any wiring and sub-backplane interconnect boards.
This design reduces the path impedance between the supply and the
VXI modules receiving power, which results in improved dynamic
current performance. Refer to Appendix A, Specifications, for further
details.
Power Supply Protections
The seven VXIbus power supply outputs are protected for the
following conditions.
•
Over-voltage
•
Over-current and short circuit
The AC input of the power supply includes protection for input current
fusing.
See Appendix A, Specifications, for details pertaining to the above
protections. If any of these protections are active, the power supply
may shut down. This means it has, effectively, turned itself off to
protect the system. The Power On/Standby switch or the Remote
Inhibit input must be cycled to turn the mainframe back on. Refer to the
Powering on the Mainframe and Using Remote Power On/Standby
Switching sections in Chapter 3, Operating the VXI-1200.
