SW01 to SW08 are inputs that allow a local switch mounted on the layout to operate the slow motion turnout machine.
For example, SW01 when connected to the +VE sensor common (Pin 2 in figure) will reverse the voltages on SMTM1A and SMTM1B to change the position of turnout 1.
SW02 controls local turnout 2 , etc.
For each connection to +VE sensor common the slow motion turnout machine swaps direction and a Switch message is sent to LocoNet to report the new position of the turnout.
This local control can be disconnected by setting OpSw 15 to closed, in which case the 8 slow motion turnout machines can still be controlled by the system via LocoNet while the local switch inputs have no effect.