The PMCspan board allows users to customize their exact I/O requirements with Emerson Network Power's VME based CPU modules designed around the PowerPlus Architecture.

When coupled with an MCG processor module, the PMCspan provides up to six PMCs, more expansion capability than any other VMEbus processor module. Each PMCspan supports either two single-wide or one double-wide PCI Mezzanine Card (PMC). By stacking PMCspans, a total of four additional single-wide PMCs can be added to MCG's compute engines—either today or as future application growth demands.

The PMCspan is a standard 6U single-slot VMEbus module that links to its host board via a PCI expansion connector. It supports both front panel and P2 I/O access for customer supplied PMCs.