I never worked on a system with these stations so I don’t have any additional information. Also, I don’t have any information on the internal wiring or operation of these stations beyond what is shown in the diagrams. As the document says these were installed on 4246/7 and 4208 systems.
Unlike new panels where the computer chip controls the reset length, the older systems had a switch that could be turned for whatever length required. I don’t think there is anything in the station powered by the zone because the 4246/7 put 120 VAC out to the zone and the 4208 is a 24 VDC zone. Those would be incompatible. It could be some sort of sequence of reset operation between the panel reset and the station reset.
There are cams and micro-switches in there. One disconnects the coders towards the end of line while a coder is running. There must be another that stops the motor when the coding is complete. The reset process has to get the motor back to the start position.
Obviously, I am sort of guessing on how this all works.