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A panel mounting Pulse Width Modulation Motor Speed Controller with fantastic crawler speed control & Forward / Reverse Switch.
Very simple to connect – 2 wires coming in from the 9v to 24v Power Source, 2 wires going out to the Track. No programming, just Plug and Play.
Very easy to mount in you Baseboard or Control panel – requires a 140mm x 60mm hole, fixed with 2 No2x18mm Self Tapping screws and Nylon washers.
 
The Power ON switch shows a Green Indicator when Live. – This supplies power to your system.
The Forward / Reverse switch has indicators Green for Forward, Red for Reverse. This switch also has a centre OFF position
The Forward Reverse switch does not have realistic slow stop and slow start, so will come to a halt immediately. 
Now some specifications:
Power Requirement:                      9v to 24vDC at 2 to 5 Amps
Output Current:                                0 to 20 Amps
Output Voltage:                                will be a Pulse Width Modulation 
                                                                 between 0v and 100% input voltage.
Frequency:                                          25KHz
Continuous Power:                          1200W
Overload Protection:                      Yes
Short Circuit Protection:               Yes
Internal Fuse protection:               Yes
Write on panel for identification.