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Auxiliary Relay Module and 3 wire Turnout control
RRConcepts.com
Red wire
this end
Attach relay cable between
relay and YardMaster
Auxiliary RELAY MODULE
Red wire this
end
For reference only! Use the hookup diagram for proper usage.
The YardMaster-5 contains data ports to control external DPDT relays for enhanced operations.
When an Auxiliary relay module is attached to the external port 1 it can be configured to either
control 3 wire turnouts, or switch in synchronization with the YardMaster on-board relay.
The default operation after a factory reset will control 3 wire turnouts sometimes used on
N and HO track switch machines.
The hookup diagram is shown on page 6. Some 3-wire turnouts
have excessive voltage and current requirements which the relay can handle. A very quick burst
of voltage is given to the switch motor which prevents overheating and operates without the need
for capacitive discharge units.
When the YardMaster is programmed for “blink 3” then the Auxiliary relay will switch in
synchronizationwith the on-board YardMaster relay
.
This can provide additional switching capability if needed.
When the YardMaster is programmed for “blink 7” then the Auxiliary relay will ALTERNATE
every time the YardMaster switches to RED.
This is used for reversing track polarity on an alternating trains hookup. (See alternating trains
hookup in this manual) This can not be done when using 3 wire turnouts since this relay will
control the switch motor.
When attaching the StationMaster relay cable note the location of the red wire and attach as shown.
Some cable assemblies have an arrow on the connector on this wire however this is not always true.
Use the wire color as the guide. If the relay does not operate then try swapping the connector
polarity on the relay.
See note
