About this site...
Updated October 2023
Model Railroad Signal Systems has signal control systems and DCC auto reverse circuits for use
with any scale of model railroading.
No matter what scale you model, a modular signal system will bring your layout or Free-mo module
to life with realistic operating signals.
If DCC auto reverse is what you are looking for, click on the menu link above to access two types
of DCC auto reverse boards.
The Free-mo section currently has 6 boards that are compatible with the Free-mo Modular Signal
System (MSS) version 2 which was released in the fall of 2014.
FTM-4 Turnout Module
May 2023
The FTM-2 is being replaced by the new FTM-4 board. The operation of the circuit remains mainly the same
as before with the exceptions of a few extra features. The new board has LED indicators for the optical sensor
and turnout position. It also has an additional terminal to supply 5v to the FC-51 sensor. The main difference
is most of the onboard components are now surface mounted which saves on assembly time.
GCC-1 Grade Crossing Controller
October 2023
Now Availble... A grade crossing controller that operates like the prototype. This unit is being sold with or
without servo motors for operating gates at a crossing.
New Infrared Sensor
August 2022
The original IR sensor supplied with some of the boards have become difficult to source and their
prices have increased significantly. An new IR sensor, the FC-51, is now being supplied. Installation
instructions are posted on the webpages for the boards that require IR sensors.
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