Welcome to RR Concepts

2023 Price List and Order Form

Model train electronics from RailroadConcepts

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The YardMaster is a multi-function "do-it-all" module but sometimes only a basic operation is needed. For this reason the YardMaster can be ordered in two different configurations; the YardMaster-SM, and the Full Featured YardMaster.

The YardMaster-SM is a cost-effective version that can be used for StationMaster and simple switching applications. (Reversing loops, etc.) If you are connecting to a StationMaster or just need the internal relay and turnout controls then this version will work. The SM version will not contain the current sensor or signal lamp control relay and connector..

The standard Full Featured YardMaster contains all features and will work everywhere in all hookups. This is the most flexible unit and recommended if the setup will be changed in the future. It will work with or without a StationMaster hookup. The YardMaster is also available as a bare PC board without the plastic enclosure which is how many of our competitors offer their products. (Please inquire about the bare board version for a reduced price)
YardMaster SM Version

Does not include signal light relays, or current sensor.
This is the good choice when used with a StationMaster.

YardMaster Full Featured

Signal light relays and current sensor included.


Full Featured YardMaster-5


The StationMaster is available in both a VERSION 5 or VERSION 6 hardware configuration. Both versions perform all basic StationMaster operations, but the 6 version has additional features and controls. See the StationMaster page for details. The StationMaster-5 version can be ordered in one of three configurations tailored to a specific hookup; Station Stop, Reversing (See Reverser below) or XL Full Featured which contains both station stop and Reversing.

All StationMaster units are available in a 4 AMP or 10 AMP configuration. (This is the maximum AMP load, not the rating of the transformer.) For reference, An LGB 0-4-0 requires about 1 AMP, so you could run 4 engines simultaneously with 4 AMP unit. A Bachmann 4-6-0 requires about 1/2 AMP. You could run 8 at the same time with 4 AMPs. The 4 AMP configuration will shut down at approximately 5 AMPS while the 10 AMP configuration contains additional cooling hardware and will allow up to 10 AMPS.

StationMaster-5 STATION STOP

Classic version which provides one directional operation.
For Station Stops, Block Control, Multiple train siding operations, etc.
$130 - 4 AMP

$140 - 10 AMP

StationMaster-5 XL Full Featured with Reversing

All features of the STATION STOP version with additional controls for back-and-forth operations.
$140 - 4 AMP

$150 - 10 AMP


All features of the XL Full Featured version with additional hardware to allow bypass operations (complete dis-connect to allow manual control), signal light controls, external relay control, additional sensor inputs, minimum speed settings, etc. A bypass cable is included which will allow full manual override by adding a switch to the cable.
$150 - 4 AMP

$160 - 10 AMP

Station Stop KIT

Everything needed for a full deceleration, pause, acceleration station stop. Includes 1 StationMaster-5 STATION STOP (4 AMP), 2 Sensors, one Magnet, and the Screwdriver/Magnet tool. With this kit the train can either perform the self-adjusting "Creep Stop" deceleration, or two separate station stops could be done on a circle with 2 stations. See the StationMaster manual for hookup details.

$140 Large Scale:
Small Trains (N/HO/On30, etc):

4 AMP versions shown. Click to see larger image. Sensors and magnets sold separately.

StationMaster / Reverser

The StationMaster / Reverser (sometimes referred as Automatic Shuttle) is used for back-and-forth hookups with either diodes on the ends, or sensors. When using sensors in-between stops are possible. The StationMaster and StationMaster/Reverser use identical electronics and look the same (except for the label), but contain completely different software. Because it operations with StationMaster hardware it allows smooth accelerations and decelerations, adjustable wait times, overload protection, and more.

StationMaster / Reverser 4 AMP (sensors sold separately) $130
StationMaster / Reverser 10 AMP (sensors sold separately) $140
StationMaster / Reverser KIT (No Sensor reversing)

Contains: One 4 AMP StationMaster/Reverser, two code 332 (large scale) track Isolators, and three 1 AMP diodes. Just attach diodes to the isolators and wires to the track for a complete reversing solution.


4 AMP version show. Sensors and magnets sold separately


Train Sensors, G Scale, 2 pack $9
1 Dozen G scaleTrain Sensors $40
Train Sensors HO/N $4.50
Very sensitive weather resistant sensors that can be completely hidden under the track. Sensors are also excellent as general purpose reed switches which can be mounted in locomotives for chuff-sensors, whistle triggers, etc. Magnets are required for triggering. (sold separately)
Package of 2 sensors shown.


Train Magnet, G Scale $4
Train Magnet HO/On30 Scale$2.50

Very strong Neodymium Iron Boron magnets with removable magnet mounts (G Scale only) that are used to trigger Train Sensors. Strong magnets allow up to 1 inch sensing distance for G scale and about 1/2 inch HO scale.

Screwdriver + Magnet Tool

Screwdriver + Magnet Tool $2.00

Screwdriver with small blade perfect for screw down terminals with strong magnet on the end for triggering sensors.

Protection & Reversing Diodes

10 AMP Diode with pigtails and wire nuts. $1.50
10 AMP diode with attached pigtail wires and wire nuts for easy installation, or wired leads for attaching to track isolators. Used to prevent damaging reversed voltage from entering system. Recommended for applications where a StationMaster is attached to a YardMaster and also for reversing hookups. See manuals for details and usage.
10 AMP Diode with leads. $0.50 each
1 AMP Diode with leads used for reversing. Can be connected across track isolators on ends. $0.50 each
Reversing Diode Kit - includes 5 self-tapping screws and 4 diodes (2 x 1 AMP and 2 x 3 AMP) Please note that attaching a 1 AMP diode across a brass isolator is an easier solution. $2.50 each

Interconnection Cables

Straight cable for StationMaster to Yardmaster-5 connection. $3.50 each
Startech TX3SPLITTER Y Cable for StationMaster to multiple YardMaster-5 connections. Used for attaching one StationMaster to two or more YardMasters. $7.99 each

External Relay Modules

YardMaster Relay + cable $9.50 each

10 AMP Relay module that can be added to the YardMaster for advanced hookups. Includes attaching data cable. See the YardMaster manual for details.



Track Isolators

Code 332 Isolator (Large scale trains) $5.25 each

Split-Jaw code 332 brass insulating clamp. Add a wire to the screws for easy track connections.


Repair Service

Repair service $35 each

Repair service for out of warranty units. (older than 1 year) Return address will be sent with order. Does not include software updates.


Upgrade Service

Upgrade service $45 each

Upgrade service for Legacy StationMaster-5 units to convert to XL. Includes upgrade of necessary hardware components to support new software, and incudes software upgrade. Return address will be sent with order.Please note that very old units may not be upgradable.


Free Stuff

5mm LED Free Bi color RED GREEN LEDs, common anode, diffused. These would work for a YardMaster signal light. (See manual for details)
5mm LED Free Bi color RED GREEN LEDs, common anode, water clear. These would work for a YardMaster signal light. (See manual for details)
5mm LED Free RED.
1000uf capacitors Free Come and get 'em. Too large to fit inside our units so we have no use for them.

We are giving away some parts which are no longer needed free with any order. Please send an e-mail with the quantity desired.