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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