that second vid with that 30-1159 is definitely PS1. in order to fire the coupler, (from another railking protosounds 1 manual);
"
locomotive tender is equipped
with a coil-wound ProtoCoupler for remote uncoupling action. Because
the ProtoCoupler is controlled through ProtoSoundÆís microprocessor, it
doesn't require an uncoupling track section or modification to your layout
to function. The three simple steps below are required to operate the
coupler.
1. Put your engine in NEUTRAL and turn the throttle all the way up.
2. Press the transformer whistle button to "Arm" the coupler. (You
will hear a Clank").
3. After arming the coupler, press the whistle button again to open
the coupler.
When the knuckle fires
open you will hear the buzzing
of the coil energizing and the sound of air lines coming apart.
The coupler doesn't have to be fired in NEUTRAL.
Once the coupler is armed it can be fired in Forward, Neutral or Reverse.
However, you may find that the
coupler doesn't open when
firing the coupler at high
speeds. Reduce the voltage
setting on your transformer if
this occurs and run your engine
at a slower speed before firing
the coupler. If the coupler
continues to open erratically, try
lubricating the knuckle with
light oil