SA BOARDS FOR SHUTTLES AND PASSING LOOPS
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SA1 SINGLE LINE SHUTTLE:
The SA-1 operates a branch line shuttle service.  A train runs backwards and forwards over the line gradually slowing as it approaches the ends of the line.
Four train detectors are required e.g. IRDOT-1s or reed switches. A detector is at each end of the line to tell the SA1 where the train is to stop. Detectors are also positioned where the train is to start slowing down.
It is possible to add sidings at one or both ends using IRDOT-Ps to switch the points, so allowing any number of trains to alternately run backwards and forwards between the sidings.  The IRDOT-P "P" terminals will replace the train detectors at the ends of the lines.
SA1-S SINGLE LINE SHUTTLE WITH SIGNAL CONTROL AT EACH END:
This works in the same way as the SA1 but with controls for a starter signal at each end of the line.  Four train detectors are required.
SA1.1 SINGLE LINE SHUTTLE WITH STATION STOPS:
This unit works in the same way as the SA1 but allows intermediate station stops to be operated. Any number of station stops can be operated.
Four train detectors are required, plus two train detectors for each station stop in each direction.  For a station stop one train detector is positioned at the start braking position and one at the stop position.
SA2 SINGLE LINE SHUTTLE WITH SIDING AT EACH END:
Operates as the SA2-S but without signal control.
SA2-S SINGLE LINE SHUTTLE WITH SIDING AT EACH END AND TWO STARTER SIGNALS:
Two trains run alternatively along a single line.  As the train approaches the end of the line it gradually slows then stops.  There is an adjustable delay, then the point changes to the other siding, a short delay, the other sidings signal sets to clear, a short delay and the second train slowly accelerates away.
Six  train detectors are used.  Two at the "start slowing "  positions and four for the stopping positions at the end of the sidings.
The SA2-S controls two signals.  These signals operate for trains leaving both sidings at one end of the line.
 
SA9 SINGLE LINE SHUTTLE WITH SIDING AT ONE END :
Exactly as described for the SA9-S but without the signal operation.
SA9-S SINGLE LINE SHUTTLE WITH SIDING AT ONE END AND CONTROL FOR TWO STARTER SIGNALS:
Both trains always start at the left-hand sidings. Points change for train A. Short delay. Signal clears for train A. Short delay. Train A accelerates away to siding at right. Adjustable Delay. Train A returns to its starting position. Points set for train B. Short delay. Signal clears. Short delay. Train B travels to right hand end of line. Adjustable delay. Train B travels back to its starting position at the left. Both trains are now back at the starting position and the sequence continues from the beginning.
SA9.1-S SINGLE LINE SHUTTLE WITH SIDING AT ONE END AND CONTROL FOR ONE SIGNAL:
As described for the SA9-S but with only 1 signal which is positioned at the single track (right) end. This unit is used where the siding end is hidden and the single track end is visible. The effect is given of 2 different trains arriving alternately at a terminus station
  www.manor-lane.co.uk/autoshuttle_turnback.htm  gives a description of the installation and use of one of our SA9 shuttle units by a customer.
SA10 SINGLE TRAIN SHUTTLE ON SINGLE LINE WITH SIDING AT ONE END 
The SA10 operates a single train with two sidings. The train shuttles up and down the line alternating between siding 1 and siding 2. There is an adjustable delay at each end. 5 train detectors are required.
SA12 SINGLE LINE SHUTTLE WITH REVERSE LOOP:
The SA12 operates a single line train with a reverse loop at one end.
It requires two IRDOT-P's and one IRDOT-1
For a point operated by a solenoid point motor (Peco, Seep etc) train detectors at D1 and D2 are IRDOT-P. The train detector at D3 is either an IRDOT-1or reed switch. For a spring point the detectors at D1 D2 and D3 are either IRDOT-1 or reed switches

Insulation breaks are necessary for the reverse loop. The SA-12 feeds the reverse loop with a constant polarity and switches the polarity to the straight section. 

 
SA12-S SINGLE LINE SHUTTLE WITH REVERSE LOOP AND CONTROL FOR ONE STARTER SIGNAL:
As SA12 but with the addition of relay contacts to operate a starter signal which can be either bulb or LED.
SA3 SHUTTLE WITH PASSING LOOP FOR TWO TRAINS:
This has a passing loop is in the middle of the shuttle.  Two trains run alternatively. They cross at the passing loop.  Eight train detectors are required.
SA4 PASSING LOOP FOR OVAL-OPPOSITE DIRECTION TRAINS:
Two trains run alternately around an oval.  Each waits at the passing loop for the other train to arrive before, after an adjustable delay,  departing in the opposite direction  Point switching relays are built into the unit.  Four train detectors are required.
SA4-S
This works as the above with built in relays to control the two starter signals at the ends of the loops. These signals are normally at red.  At the end of the adjustable delay the points change there is a pause the signal sets to clear another pause and the train accelerates away. A few seconds later the signal returns to red.
SA5 PASSING LOOP FOR OVAL - SAME DIRECTION TRAINS
Two trains run alternately around an oval.  Each waits at the passing loop for the other train to arrive before, after an adjustable delay, departing in the same direction .  Point switching relays are built into the unit.
Three train detectors are required.
Two or more SA5 units will operate on the same oval.  The SA5 can also be combined with the SA8 station stop or SA6 storage sidings.
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SA5-S
As the above  with control for starter signals at the ends of each loop.
SA5-PB and SA5-SPB
Push Button operated versions of SA5 and SA5-S. See New Products
SA6 STORAGE SIDINGS:
See Storage Siding section.

SPECIFICATION
Voltage 12 to 16 volts, AC or DC

SIZE
  Inches Millimetres
Length x Width 3.7 x 3.7 94 x 94