VME eXtensions for Instrumentation

VXI defines additional bus lines for timing and triggering as well as mechanical requirements and standard protocols for configuration, message-based communication, multi-chassis extension, and other features.

In 2004, the 2eVME extension was added to the VXI bus specification, giving it a maximum data rate of 160 MB/s.

The VXIbus grew from the VME bus specification, it was established in 1987 by Hewlett Packard (now Keysight Technologies[1]), Racal Instruments (now Astronics Test Systems), Colorado Data Systems, Wavetek and Tektronix.

VXI's core market is in Military and Avionics Automatic Test Systems.

The VXIplug&play Alliance specified additional hardware and software interoperability standards, such as the Virtual Instrument Software Architecture (VISA), although the alliance was eventually merged with the IVI Foundation.