Military Embedded Systems

Call for Consensus Body Members to Approve Revisions to ANSI/VITA 48.4-2018

Press Release

January 24, 2022

VITA is accepting registrations to be a member of a public review VITA Consensus Body for voting to revise this standard. You do not have to be a VITA member to participate in this Consensus Body. The response deadline to register for this consensus body is: February 7, 2022

Under ANSI and VITA rules every 5 years an approved standard must be reaffirmed, revised, placed in stabilized maintenance or withdrawn. This standard has been revised, hence it has been put forth for approval of the revisions.

DRAFT/VITA 48.4-2022x: Liquid Flow Through VPX Plug-In Module Standard

Abstract: This standard establishes the mechanical design interface control, outline and mounting requirements for a liquid-flow-through cooled Plug-In Module to ensure the mechanical intermateability of 6U VPX liquid-flow-through cooled Plug-In Module within associated sub-racks. The connector layout remains common with VITA 46. This Plug-In Module uses liquid flowing through an integral heatsink of the module for cooling the electronic components and circuit boards. The quick disconnect coupling assemblies allow fluidic coupling to the chassis coolant manifold. This revision expands the supplier list for COTS components, corrects errors in depicted dimensions, adds additional requirements for conformance to improve interoperability and maintainability, and improves elements to expand the supplier base.

Currently, this consensus body needs voting members from the following interest categories in order to be able to proceed with this process. The consensus body will be vetted to ensure it meets balance, lack of dominance and openness rules. Following which a formal ballot will be sent to the consensus body for voting.

Producer: An appropriate participant designs, develops, or manufactures products using this standard.
User-Industrial/Commercial: An appropriate participant is using this standard in an industrial or commercial application
User-Government/Military: An appropriate participant is a representative of a government agency using this standard in a government or military application.
Research: An appropriate participant is involved in research or consulting that may use this standard.
General Interest: An appropriate participant is an interested party not necessarily involved in producing, directly using, or acquiring product using this standard.
Please note that company membership in VITA is NOT a requirement to join this consensus body. This registration is open to both VITA members and non-members. You must register via this form if you wish to participate in the upcoming ballot. There is no fee to join this consensus body.

In the case that you believe this standard needs a revision, please indicate so in the comments field of the registration form and be prepared to sponsor and actively participate in the revision effort. If you are selected for the consensus body, you may provide minor editorial comments during the balloting.

Please register ONLY IF you intend to vote.

The VITA policies and ANSI Function can be found on our governance page at

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