RE: Single ended termination?.

Heinz,

The answer is we have a cabling system with short adapters to allow for cli=
ck-n-go daisy-chaining connecting up the nodes.  (And to Heikki's point, it=
 is built around DTM connectors in this case, using the terminators and Y's=
 which are available).  The reality at hand is:  If all this is short, even=
 with reflections from one un-terminated end it does often work.=20
 =20
But (And I want to be clear on this) WE do not support customers who want t=
o do this, for all the reasons Heikki mentioned. =20

Which is why I wanted to check with this group to see if there was indeed s=
ome legitimate paper, or study that had been done around single ended termi=
nation of short / low node count installs...   I have never seen one, but t=
hat does not mean there isn't one out there <smile>

I can make measurements in the lab, but am not keen on proceeding based on =
only a 1x sample 'In the Lab'.  Much different between that and when we get=
 1,000's installed in the field - with age impacting things, wires ran with=
 cross coupling, Who knows what can and will be done by installers.  Which =
is why I was seeking if there was some study, or reference that existed on =
this specific topic.


-al-


-----Original Message-----
From: [email protected] [mailto:canlist-owner@vector-info=
rmatik.com] On Behalf Of Heinz-J=C3=BCrgen Oertel
Sent: Tuesday, February 9, 2021 1:12 AM
To: [email protected]; [email protected]
Subject: Re: [CANLIST] Single ended termination?.

Al,


Am Montag, 8. Februar 2021, 23:24:00 CET schrieb Al Thomason:
> Example, 250Kbps, 2-3 nodes over a total CAN distance of maybe 1-2m at ma=
x?

how do you connect, with connectors? with 3 nodes you will need something l=
ike a T-connector.
Anyway, with this low number of nodes and very short cables, it could be en=
ough to check the signal quality using a scope.

--=20
Heinz


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