The nice thing about the 2B1 are the alternators .... These power the engine and DECU so even if you have a full aircraft electrical system failure, the engine will retain full authority.
A generally similar arrangement on the 407: an engine (Np) driven permanent magnet alternator (PMA) powers the FADEC (with NP > 85%) in the event of an aircraft electrical system failure. "Full authority" is retained unless there should also be a FADEC failure.