C
IRRUS
D
ESIGN
S
ECTION
7: A
IRPLANE
AND
S
YSTEMS
SR20
E
LECTRICAL
S
YSTEM
P/N 11934-005
7-47
Figure 7-10:
Electrical System Schematic
VOLT REG
BAT 1
RELAY
EXTERNAL
POWER RELAY
5A
CO
NV
CONV
LIGHTS
CABIN AIR
CONTROL
30A
BAT 2
SWITCH
BAT 2
AVIONICS
SWITCH
20A
8A
20A
VOLT REG
BAT 1
SWITCH
EXTERNAL
POWER
MA
IN
D
IS
T
BU
S 2
50A
50A
80A
30A
30A
30A
STARTER
SWITCH
AVIONICS
NON-ESSENTIAL RELAY
30A
30A
STARTER
125A
STARTER
RELAY
BAT 1
ALT 1
RELAY
M
A
IN
D
IST B
U
S 1
30A
ALT 1
F
B
100A
MASTER CONTROL UNIT
ALT 1
SWITCH
DME / ADF
AV
IO
NIC
S
BUS
AUDIO
PANEL
DATA LINK/
WEATHER
TRAFFIC
XPONDER
STDBY
ATTD B
MFD B
MAIN B
U
S 1
CABIN
LIGHTS
FUEL QTY
KEYPADS
/ AP CTRL
AP SERVOS
AVIONICS
ICE
LIGHTS
E
SSEN
TIA
L
B
U
S
2
ENGINE
INSTR
STALL
WARNING
PITCH
TRIM
ROLL
TRIM
GPS NAV
GIA 1
COM 1
ESSE
N
T
IA
L B
U
S
1
ADAHRS 1
PFD A
STDBY
ATTD A
ESSENTIAL
POWER
BAT 2
A/
C
B
U
S
1
A/C COND
ALT 1
GPS NAV
GIA 2
COM 2
MAIN BU
S
2
ADAHRS 2
PFD B
FUEL
PUMP
AVIONICS
FAN 2
ALT 2
A/
C B
U
S
2
CABIN
FAN
A/C COMPR
NAV
LIGHTS
STROBE
LIGHTS
N
O
N-ESSEN
T
IA
L
BU
S
PITOT
HEAT
FLAPS
STARTER
AVIONICS
FAN 1
ALT 2
SWITCH
CIRCUIT BREAKER PANEL
ESSE
NTI
A
L D
IST
B
U
S
30A
30A
ALT 2
F
B
60A
50A
LANDING
LIGHTS
8A
MFD A
MAIN BUS 3
12V & USB
POWER
EVS
CAMERA
SR20_FM07_5380
Reissue A