.: Welcome to Model Railroad Signal Systems
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About this site...

Updated June 2017


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 5 boards that are compatible with the Free-mo Modular Signal System (MSS) version 2 which was released in the fall of 2014..


    .: Signal Boards For Sale:

Installation instructions can be downloaded for each board for easy installation.

Click on a photo or link for more information about each board.


FCM-1 Signal Cascade Module

Designed for bi directional signalling at a signal boundary.

(Free-mo Cascade)



Price for 1 FCM-1 board is $59.00 cdn.

Price includes the Optical Sensor.



FBM-1 Block Detection Module

Designed to detect current for a block or section of track.

(Free-mo Block Detection Module)




Price for 1 FBM-1 board is $30.00 cdn.



FOM-1 Optical Detection Board

Designed to detect trains at a signal boundary where signals are not used.

(Free-mo Non-signalled Cascade)




Price for 1 FOM-1 board is $35.00 cdn.

Price includes the Optical Sensor.




FTM-1 Turnout Cascade Signal Router 1

Designed for turnouts where no signals are used but signal routing is desired.

(Free-mo Non-signalled Cascade)




Price for one FTM-1 board is $49.00 cdn.



FTM-2 Turnout Cascade Signal Router 2

Designed for turnouts where signals and signal routing is used.

(Free-mo Signalled Cascade)




Price for one FTM-2 board is $79.00 cdn.

Price includes the Optical Sensor.


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Two DCC auto reverse devices are available. Click on one of the links or photos shown below for more information about each board.


ARM-1 DCC Auto Reverse Module

A simple relay operated auto reverse board.




Price for 1 ARM-1 board is $35.00 cdn.



ARM-2 DCC Auto Reverse and Circuit Breaker

A solid state, fast switching, Auto Reverse Circuit with built in circuit protection.




Price for 1 ARM-2 board is $55.00 cdn.

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Both types of signal boards listed below provide basic Absolute Block Signalling for common cathode type signals. For more information about each signal board and their features, click on one of the links or photos shown below.


TSC-1 Target or 3 light Signal Controller




Price for 1 TSC-1 board is $20.00 cdn.


SLC-1 Search Light Controller




Price for 1 SLC-1 board is $20.00 cdn.


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    .: What's New?
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Infrared Sensor Firmware Upgrade

July 2017


There is a FREE firmware upgrade available for the FTM-2, FCM-1 and FOM-1 modules. This upgrade allows modules with infrared sensors to work under conditions where a strong source of infrared light is present. External sources of infrared light can sometimes cause the infrared sensor to false trigger causing the signals to display an occupied block. The operation of the signals remain unchanged with this upgrade.

The firware upgrade is FREE however, shipping to and from my location is not covered. Luckily, all the CPUs on every board sold here are socketed and can easily be removed for shipping. This will keep shipping cost to a minimum.

To have your boards upgraded, email me requesting you would like the upgraded along with which boards and the quantity of each type you would like upgraded. I will then send you an RMA number. Download the RMA form and CPU removal instructions from the top right side of this web page. Fill in the RMA page and include it with your shipment. Once your upgrades are complete, a paypal invoice will be generated to cover the cost of shipping your chips back to you. Turn around time should only be a few business days.

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Lower Prices !

October 2016


Prices have been lowered on several popular boards.

FTM-1, FTM-2, FCM-1 and ARM-1

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Redesigned FBM-1

February 2016


The FBM-1 board has been redesigned with an extra set of output terminals to control external devices that are not connected to the occupancy bus. This is now available for sale.

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DCC Auto Reverse Modules

January 2016


Two Reverse Modules are now available. Click here for more information.

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