PEX431 Multi-fabric Switch

Multi-fabric switch and XMC carrier card for VPX systems


Designed to enable the development of complex, scalable, high performance 3U VPX systems in today’s increasingly-connected military/aerospace world, the PEX431 is characterized by significant flexibility. The PEX431 Multi-Fabric Switch and XMC Carrier Card allow designers to build complex VPX systems with multiple single board computers and multiple I/O modules. PEX431 supports PCIe switching, GigE switching and the ability to host a XMC mezzanine.

The PCI Express switch of the PEX431 allows up to six ports of 4-lane PCI Express to be connected to a non-blocking line-speed switch, such that a scalable, complex system architecture can be created. In order to support systems requiring interconnection of more than six hosts, multiple PEX431 boards may be daisy-chained together.

The PEX431 has an unmanaged Layer 2 Gigabit Ethernet Switch that offers up to nine ports, of which up to eight can be in 1000BASE-BX and up to two can be in 1000BASE-T.

The PEX431 is capable of carrying XMC modules and can be configured for 8-lane PCI Epress at the VPX backplane connector. The XMC option is not available with the Ethernet Switching option.

From a software perspective, each PCI Express port is a virtual PCI-to-PCI bridge device, with its own set of PCI Express configuration registers.



  • PCIe Features

    • Up to six x4 PCIe Gen 3.0 ports via non-blocking switch
    • Non-transparent bridging mode for multi-host systems


    Ethernet Features

    • Up to nine ports Gigabit Ethernet Switch, unmanaged (not available with XMC option)

             Build Options Include:

    • Up to 8x 1000BASE-BX with 1x 1000BASE-T
    • Up to 6x 1000BASE-BX with 2x 1000BASE-T


    Mezzanine Features

    • Supports XMC Modules (not available with Ethernet switching option)
    • Mezzanine I/O routed to VPX backplane
    • XMC IO via P16 x24s+x8d+x12d
    • PMC IO via P14 x64s



OpenVPX Logo

OpenVPX Logo


Form Factor
1x XMC
Fabric Interface
Air cooled rugged

Related Downloads

Can’t find what you’re looking for? Need help?

Head on over to our support pages, where you’ll find key contacts, how to obtain documentation, information on warranty and repairs, contract samples, details of our Product Lifecycle Management and Configuration Management programs – and much more.