TCMS monitors and controls all the vital signals related to train operation and establishes communication among other subsystems.

Processor cards are responsible for the operation monitoring and control of responsible sub-system. All converters, Brake systems and doors etc. are having their own processors. It communicates with TCMS.

Gate Drivers are responsible for triggering the IGBT, GTO. They turn-off the firing of the device in case of emergency to avoid device damage.