Diamond Aircraft DA 50 C, Airplane Flight Manual

Page: 381 / 433

3.1 HOT BUS:
The HOT BUS is connected to the main battery and cannot be disconnected from the main
battery. The HOT BUS provides power to the pilot map/reading light which is protected by its
own fuse.
3.2 BATTERY BUS:
The BATTERY BUS is connected to the main battery via the battery relay which can be
controlled by the ELECT. MASTER switch. The BATTERY BUS provides power to the
ESSENTIAL BUS and heavy-duty power to the starter.
3.3 ESSENTIAL BUS:
The ESSENTIAL BUS is connected to the BATTERY BUS via a 60 Ampère circuit breaker. It
is also connected to the Tie Relay via a 50 Ampère circuit breaker. It provides power to ECU
A via a 10 Ampère circuit breaker and to the main fuel pump via a 5 Ampère circuit breaker.
The ENGINE MASTER switch must be set to ON to activate ECU A and the main fuel pump.
3.4 MAIN BUS:
The MAIN BUS is connected to the Tie Relay via a 50 Ampère circuit breaker. Also, it is
connected to the power output of Alternator 1 and 2 each via a 60 Ampère circuit breaker. The
MAIN BUS provides power to the AVIONIC BUS via the avionics master relay. The AVIONIC
MASTER switch must be set to ON to connect the MAIN BUS to the AVIONIC BUS. Also, it
provides power to ECU B via a 10 Ampère circuit breaker and to the emergency fuel pump via
a 5 Ampère circuit breaker. The ENGINE MASTER switch must be set to ON to activate ECU
B. To activate the emergency fuel pump, the EMERG. FUEL PUMP switch must be set to ON.
4 Consumers
The individual consumers (e.g. radio, position lights, etc.) are connected to the appropriate bus via
automatic circuit breakers.
Designations and abbreviations used to identify the circuit breakers are explained in Section
ACRONYMS – Designation of the Circuit Breakers on the Instrument Panel.
AFM DA 50 C
Doc No.: 9.01.01-E
Issue : 011
DA50-A-24-00-99-00A-040A-D
07
Page 07-66
14-Dec-2022