Comprehensive documentation of the
V2.2.0 MSS
Standard is now available. Information is included for both
developers and users.
Methods for installation or retrofitting of two
types of IR detectors are described in the following articles:
This
Heathcote IRDOT note
shows you how to adjust the IR detector time delay time.
The
OBUB-3,
designed by Gregg Fuhriman, makes MSS installation much easier and more compact.
If you wonder how signals should operate, there are several resources
that you might find helpful, expecially if you're an ATSF modeler. One is a
detailed summary of the most likely
operation of signals on the single track Second District (the "Pasadena
District") in Southern California. This page was created for me by Carsten
Lundsten with help from Barry Draper. Carsten has
extensive information on signal operation for North American railroads that
you many find helpful. Barry Draper has created three documents describing
prototypical practices that are intended to be helpful to modelers. Barry's
documents include: Signal
Placement for Model Railroads,
Santa Fe and Southern
Pacific Signal Practices, and
Southern Pacific & Santa Fe Signals.
If you wonder how turnout position is determined on the prototype, here is a photo
of Santa Fe's "circuit
controller and switch indicator at hand thrown switch". A drawing for this device can be found in The Chief Way Reference
Series, System Standards, Volume Two.
I prepared a summary of
Carsten's information for
implementation on the Shandin loop module.
Both Carsten and Barry Draper were helpful in making sure that I
got it right. There were
some of the conditions that I couldn't implement in the absence of the
ability to sense the direction of trains.
Gary M. Green
