The function of PXI extension card is to extend the PXI backplane signal outside of the chassis. Every time the extension card activates it can supply the power required for PXI initialization. It eliminates the need for rebooting the PC when users read and re-write the configuration files.

The PXI extension card allows users to measure the voltage consumption power of PXI standard 5 s voltage settings, easily using the voltage meter. The extension card has an over current protection circuit that can prevent the system backplane and other related components from damage once the PXI card malfunctions

Jumpers on the extension card are available for users to define the current range for protection; in addition an outward power connector is attached to supply the power externally instead of using the backplane power.