David Lesher  wrote:
> "The sense and braking unit (SBU) is a device placed on the rear of
> the train and is connected to the train brake pipe. [...] The SBU data
> from MMA-002 were downloaded (Engineering Laboratory Report
> LP132/2013)."
>
> How different is this from a FRED?

SBU is Canadian for FRED.  Wikipedia (would they lie to you?) has more:
http://en.wikipedia.org/wiki/End_of_Train_Device_%28ETD%29

> Are the logs stored in the SBU or the cab?

For this particular SBU, it was in the SBU.  See the TSB Canada lab
report referenced above:
http://www.tsb.gc.ca/eng/lab/rail/2013/lp1322013/LP1322013.pdf

I *think* the Wabtec product line is the "Trainlink" series, that used
to be produced by Pulse Engineering.  I tried to find manuals online,
but Wabtec's web site is pretty hopeless.

A competitor is Union Switch and Signal's "Digitair", now part of
Ansaldo STS.  I found a Digitair manual online, for what seems to be
their current product.  It talks about hooking the thing up to a PC for
configuration and test, but doesn't mention the ability to download any
data.  (On the other hand, they may choose not to disclose that
ability.)
https://productsupport.ansaldo-sts.us/Manuals/7075.pdf

Matt Roberds

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