IR MEMU 13038Alappuzha Kerala Alappuzha

I understand that her head cars can work without intermediate cars? Intermediate wagons clearly do not have ancillary equipment ...
And what about the technical characteristics? Are the engines collector or asynchronous?

@white.dead In this case it is an 8 car MEMU rake for which 2 power cars are sufficient.But in busy sections IR is running 20 car MEMU Rake where there are collectors on intermediate cars as well