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Re: [802.3_SPMD] Late Comment on D2.1

Michael - thanks for doing this. I'm wondering though, for true plug and play nodes, should this be more than a withstand without damage? Shouldn't we spec it so that it operates normally? (Which might mean linearity tests)
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On Mar 8, 2025, at 2:23 PM, Paul, Michael <Michael.Paul@xxxxxxxxxx> wrote:



All,

 

I just want to inform everyone I submitted a late comment against D2.1.  We are trying to adjust the resistance through a node and set current limit for powered mixing segments in clause 189, but it appears that clause 188 nodes do not have any specifications related to current tolerance, so I submitted the following comment.  I am open to discussion on this topic.

 

Regards,

Michael Paul

 

Technical

100

188.9.1

42

Ensure that non-powered DTE can pass current without damage when connected to a powered mixing segment.  DC resistance through an unpowered node is not specified.

Add a setcion after 188.9.1.3 (188.9.1.4) - TCI line powering current tolerance:  The DTE shall withstand without damage the application of any current between -2A and +2A applied across TC1's BI_DA+ to TC2's BI_DA+ and TC1's BI_DA- to TC2's BI_DA-.  Each DTE,
including mated connectors and compensation components, adds up to 150 mΩ to the mixing segment loop resistance.

Yes

 

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