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How to connect MTH Rail King™ O-scale operating crossing signal flashers and gates to the Azatrax control system

The MTH RailKing™ line of O-scale crossing signals are well proportioned for 3-rail O-gauge and 'high rail' S-gauge (American Flyer™) train layouts and are simple to use. The RailKing™ units have a flashing circuit built into the signal base. To operate the signal, you simply apply power at the right time.

The Azatrax model railroad crossing control system can be used to operate MTH Rail King™ grade crossing signals in a more realistic fashion, especially at crossings with mutiple tracks, than is possible with the stock system. The Azatrax system also allows the train detectors to be placed in the track roadbed, leaving more table space for model structures and accessories.

MTH Operating Crossing SignalsMTH Crossing Signal Flashers, 30-11010, 30-11006, 30-11014

The first schematic diagram shows how to wire MTH signals (without crossing gates) to the Azatrax crossing system.

See below for Rail King signals with gates.

This wiring diagram shows the MTH signals controlled by an MRD6-X HexDetex™, which is connected to a DC power supply such as our PS906. The HexDetex™ watches the train detectors along the track, and turns on the crossing signals when it senses an approaching train.

MTH crossing flasher wiring

Two or more MRD6-X units can be connected to the signals to protect multiple tracks at the same crossing.

How many sensors do I need, and where should I put them? It depends on how your trains will operate near the crossing and how you want the signals to respond. See the HexDetex™ installation instructions to get started.

 
MTH Operating Crossing Gate Signal, 30-11012

The RailKing™ 30-11012 O-scale crossing signals have operating gates and are designed for O-gauge 3-rail layouts. They also look good with American Flyer™ S-gauge trains.

These signals have the gate operating motor and flasher circuit built into the base. The signal mounts on top of the layout surface and is very easy to install.

This diagram shows how to wire the crossing gates to an Azatrax MRD6-X HexDetex™. The Azatrax system provides realistic operation of the signals for trains operating in both directions on the track.

The HexDetex™ monitors up to six infrared train detectors which can be hidden in the track roadbed. When the controller senses an approaching train, it operates a relay, such as an MRAPR relay, that switches power to the signal to make the gates go up and down.

MTH crossing gate schematic

Two or more MRD6-X units can be connected to the relay to protect multiple tracks at the same crossing.

How many sensors do I need, and where should I put them? It depends on how your trains will operate near the crossing and how you want the signals to respond. See the HexDetex™ installation instructions to get started.

The power supply must be DC because the MRD6X has a transistor switch connected between terminals 'B' and 'C'.
If a detector with a relay contact is used instead of the MRD6X (such as our MRD1, MRD2 or MRD8) then the accessory power may be AC or DC.

For simple 2-sensor operation use a D2T-Xing controller. The D2T-Xing circuit will work with AC or DC accessory power.
Click here for the D2T-Xing installation guide [pdf].

Questions? Send us a message by using our contact page.

MTH Crossing Gate Signal
MTH RailKing™
operating crossing signal

MTH 30-11012
crossing
signals
one pair
 
$69.90

Out of
stock.



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