Track Accessory Power
The Track Accessory Power board can be used to power any DC operated device from track power. It will maintain a constant DC output voltage of your choosing (3-35VDC, 2A), regardless of polarity or level of track voltage. When track voltage goes to zero, the backup battery (not supplied) takes over. Use it in rolling stock equipped with track pickups or direct connections to the track for trackside attractions.
The backup battery will eliminate all power interruptions due to dirty track, poor track pickups, etc. It can also be used for extended power to your device while the train is stopped.