AIRCRAFT
DA 42 NG AMM
Electrical Power
Doc # 7.02.15
Rev. 4
24-00-00
Page 7
15 Mar 2018
3. Power Supply Control
(1) Battery Relay
The battery relay is located on the relay panel in the front baggage compartment. The output
from the battery connects directly RELAY BOX BUS bar. The coil + of the battery relay is tied
to the b connection to the relay and the BATTERY BUS via diodes. The ELECT.
MASTER switch provides the coil ground when set to the ON position.
(2) External Power Relay
The external power relay is located on the relay panel in the front baggage compartment. The
relay output connects directly to the RELAY BOX BUS bar.
If a 28 V external power is connected, the +28 V DC on the control pin energizes the relay. The
relay operates and connects the external power to the RELAY BOX BUS bar.
(3) Starter Relay
The starter relay contacts connect to the RELAY BOX BUS bar. Power is applied to the coil of
the starter relay when the ELECT. MASTER switch is set to ON and the START switch is set
to START LEFT or START RIGHT. The energized coil operates the starter relay which connects
the power to the solenoid of related engine starter motor.
(4) Bus Structure
All buses (except the RELAY BOX BUS) are flat metal strips connecting rows of circuit breakers.
The circuit breakers are located on the instrument panel.
Summary of Contents for DA 42 NG
Page 933: ...AIRCRAFT DA 42 NG AMM Fuel Doc 7 02 15 Rev 4 28 TITLE Page 1 15 Mar 2018 CHAPTER 28 FUEL ...
Page 1459: ...AIRCRAFT DA 42 NG AMM Lights Doc 7 02 15 Rev 4 33 TITLE Page 1 15 Mar 2018 CHAPTER 33 LIGHTS ...
Page 1711: ...AIRCRAFT DA 42 NG AMM Doors Doc 7 02 15 Rev 4 52 TITLE Page 1 15 Mar 2018 CHAPTER 52 DOORS ...
Page 1853: ...AIRCRAFT DA 42 NG AMM Wings Doc 7 02 15 Rev 4 57 TITLE Page 1 15 Mar 2018 CHAPTER 57 WINGS ...
Page 2071: ...AIRCRAFT DA 42 NG AMM Engine Doc 7 02 15 Rev 4 72 TITLE Page 1 15 Mar 2018 CHAPTER 72 ENGINE ...
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