Magnum MS Dual
• Connections:
On the rear of the Magnum MS Dual there are two pairs of connectors la-
belled ‘TO TRACK’ which you use to connect the Magnum MS Dual to your
tracks. If your train is on the track facing forward and you connect the red
terminal to the right rail and the black terminal to the left rail, the train will
go forward when the forward/reverse switch is in the forward position. If
the engine moves backwards, swap the track wires. The best way to con-
nect the Magnum MS Dual to the track is with the included banana plugs.
You can attach your wire to the banana plug, and then just plug it into the
back of the unit.
• Speed Governor:
Bridgewerks’ exclusive “speed-stop” can be used as a safety device to limit
the maximum speed of your trains. There is a speed-stop for each track
which consists of a metal plate held in place with a thumb screw. To adjust
the speed stop, loosen the thumb screw, adjust the throttle slide control so
that the train is going as fast as you want to allow, and then slide the speed
stop down to limit the maximum speed. Tighten the thumb screw. Now you
can move the throttle control from 0 up to the maximum selected speed.
• Momentum:
The SR series feature an adjustable momentum control for each track
which will limit the acceleration and deceleration of the trains. When mo-
mentum is at maximum and you move the throttle from the minimum to the
maximum, the train will slowly accelerate from a stop to the maximum
speed. Similarly if the throttle is moved quickly from maximum to 0, the
train will slowly decelerate to a stop. Momentum adds another dimension
of realism to your model railroad. In addition, the combination of speed
governor and momentum makes it easier to limit derailments when younger
engineers are at the controls.
• Wire:
Use heavy gauge wire to connect your power controller to the track.
For distances of up to 15 feet, you should use 12 gauge wire. For dis-
tances over 15 ft, you use 10 gauge wire. Although the track itself is
similar to a very heavy gauge wire, in larger layouts, significant loss can
occur from the connections between sections of track. To improve this,
run multiple power connections to the track from the controller and/or
use track clamps rather than slider type couplers. In outdoor layouts
which are exposed to extreme temperatures, the track will expand and
contract as the temperature changes, and slider type couplers may
have to be used.
• Outdoor operation
Garden railways are often installed outdoors and Bridgewerks controllers
are built to be used with outdoor railroad layouts. However, they are not
waterproof, and as with any electronic equipment, they should not be left
outdoors when not in use. To make this easy, the connections are all
made so that they can simply be unplugged and the controller can be car-
ried indoors.
• Overload Protection:
In the event of an overload, the Magnum MS Dual has two different ways of
protecting itself and your train from damage. A manual circuit breaker is on
the left side of the rear panel. The button will pop out and the power to the
track will be cut off. If this happens, correct whatever caused the overload,
wait 2 or 3 minutes and then push the switch to reset it.
In addition, there is an automatic thermal cutoff inside the controller, which
will be activated in the event of an overload. This will reset itself automati-
cally in 2-3 minutes after the cause of the overload is removed.
• Direction Control:
The Magnum MS Dual has a direction control switch for each track which
will change the direction of the locomotive. When the switch is changed,
the color of the light above the switch will change color. If the locomotive
runs backwards when the switch is in the forward position, reverse the con-
nections going to the track.
