30
1
2
3
4
5
6
20
19
18
17
16
15
7
11
8
12
9
13
14
To
TRACK
Magnet is not
necessary.
DC Power,
No polarity
YardMaster input Power
Back and forth Automatic Reversing
The YardMaster can be configured to run a back-and-forth automatic reversing system
when wired as shown. Note the use of diode isolator sections on the ends. The train will stop when it
reaches these. It is also possible to use LGB 10151 sections in place of these diodes. NOTE: if the train
does not stop when entering the diode section then reverse the direction of the diodes. NMRA and LGB operate
differently and go different directions for track polarity. Current sensing is used to detect the end of the track.
*
Pins 3 and 4 connect to the track
. Polarity is not important.
*
Pins 5 and 6 connect to the transformer DC track power output to provide power to the YardMaster.
*
Pin 20 is connected to pin 17, and these two are connected to the DC transformer output.
*
Pin 19 is connected to pin 18, and these two are connected to the other DC transformer output.
*
Pins 8 and 9 are shorted together.
This tells the YardMaster to perform automatic switching using
a programmed time delay. When powered up with this jumper installed the YardMaster will
continuously switch
if a time delay of at least 2 blinks is programmed.
One time programming: (1)Remove jumper between 8 and 9 if present and power up. (2) Simultaneously press the
ALTERNATE sensor pushbutton and either of the SENSOR pushbuttons. This enters programming mode.
(3) Press and hold the SWITCH Green pushbutton for at least 2 blinks. Power down and add a jumper between 8 and 9.
Note that the stops will be abrupt. This will work well for slow moving trains. For gradual acceleration and
decelerations, and in-between station stops consider using the StationMaster or StationMaster/Reverser instead.
Information is available at http://www.RR-Concepts.com. See the next page for diode slow down options.
Change delay
pushbutton
while running
Diode with
insulated
rail connector.
One on each
side.
RRConcepts.com
Jumper
to enable
current sensing
