'The TITAN'
Most types of point motors are not in fact motors but are solenoids. 
When two solenoid coils are placed end to end a forward and reverse motion can be created. A solenoid requires a short sharp punch of current to switch them. These high currents can damage switches and indeed cause points motors to overheat and burn out. A Capacitor discharge unit gets over this problem by supplying this high current as a high 
energy pulse to the points motor solenoid which in turn operates the points. The purpose of capacitor discharge units is to store up electricity in a capacitor. The electrical charge is released, on throwing a switch, as a pulse of a much larger current. A Capacitor Discharge Unit is normally powered with AC, generally a voltage of around 16 Volts. 
The High Power CDU can operate up to 6 point sets simultaneously.
 
Note that whether you power the CDU from AC or DC the output of the CDU will be DC. The CDU may be operated from any DC voltage up to 24v, and AC voltage up to 16 volts. Using a high voltage increases the power from a CDU. Operating from 24 volts instead of 12 volts gives 4 times the power
 
If you are using a DC input supply ensure that the input polarity is observed.