How does a( EOT) end of train device work?

Question

I see them on all the freight trains since the cabosse is no longer used on US freight trains. They flash a bright red, and are atached to the last freight car. Do they send information to the lead locomotive?

Answer 1

They tell us brake pipe pressure,if we're moving or stopped,if the marker is flashing,if a battery powered unit how much battery life is left, and some tell us whether they are moving forward or backwards.We can also send them a signal from the headend to place the train in emergency.The headend unit can also give us fault messages if there is a problem with either the headend or the rearend unit.