I can't find a UP92, what's that? Also, it may only be the 52. They made it both a throttle AND a command station, and as such, it does messaging that throttles do not. I don't know about the 51.
I suggested to the Digitrax support person who was helping me that they just add the ability to turn the command station capabilities off or on, to make it act like a simple throttle when that was desired.