SA8  STATION STOP
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SA8 STATION STOP: Two train detectors are used.  One train detector is in front of the station where the train is to start slowing.  The second train detector is positioned where the front of the train is to stop. On reaching the second train detector at the station the train stops.  It then waits an adjustable time before accelerating to the maximum speed setting.
The station stop can work in four ways: 
              The train stops on every lap
           The train stops on every second lap.
           The train stops on every third lap.
           The train stops at random.
The type of operation is selected by connecting the "slow down" train detector to a particular terminal to on the SA8 board. A rotary switch could be used to select between the terminals if you wish to change the type of operation frequently.
When the SA8 is used with the SA6 controlled storage sidings they can be wired so that (goods) trains on certain sidings of the storage loops do not stop, whilst (passenger) trains on the other sidings do stop.
If there is more than one station stop on the same line, a single SA8 can control all the stops.  Each stop requires two extra train detectors wiring to the SA8.  This will not work with the SA8-S because only one signal is controlled.
SA8-S Operation is the same as the SA8, but there is also a built in relay to control the station starter signal.
For stopping trains the signal remains at danger as the train approaches and waits at the station.  Shortly before the train departs the signal changes to clear (green).  A few seconds after the train has left the station the signal returns to danger.
For through trains the signal changes to clear when the train is detected approaching the station.  A few seconds after the train has passed through the station the signal returns to danger.  The signal  is particularly effective with random operation.