Siemens' scope of supply includes: train control and diagnosis system, traction inverter, auxiliary inverter, brake resistor, HV box and Pantograph, as well as traction motor and gear box.

For PWM current control, the maximum output current is determined by the users selection of a reference voltage and sensing resistor.

In this dissertation, several studies and designs are made concentrating on the measurement and control system of Laser Resistor Trimming Machine.