FSG 90F System
3. Installation
November 2000
Page
27
W. Dittel GmbH
13.75 V Lighting HI
from Dimmer or
lighting switch
A/C Speaker out
Headphone (HI) out
Headphone (LO) out
AF External
Dynamic Microphone (HI)
Dynamic Microphone (LO)
Intercom
RTS
RxD
Display Lighting LO
+13.75 V A/C Power
+ 13.75 V A/C Power
Power Ground
Microphone GND
RX Signal
AF Sum
PTT Switch
Amp/Carbon Microphone
AF Modem out
CTS
Data Ground
TxD
+13.75 V Lighting HI
Switched 13.3 Vdc OUT
Power Ground
FSG 90F(X)
Antenna cable
RG 58 C/U
A/C antenna
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Antenna
+
-
#18 AWG
1 mm² red
#18 AWG
1 mm² blue
INTERCOM-
Switch
¬
OFF
ô
ON
A/C POWER
13.75 V
*Built-in stick
PTT switch
Pilot
Amplified/Carbon
microphone *with
PTT switch
1
2
A/N E08639
Headphone
Jack
JJ-034
1
2
1
2
3
Microphone
Jack
JJ-033
A/N E08640
1
2
3
Headphone Plug PJ-055
A/N E08941
Microphone Plug
PJ-068, A/N E08942
Pilot
Headphone
Copilot
Amplified/Carbon
microphone *with
PTT switch
1
2
A/N E08639
Headphone
Jack
JJ-034
1
2
1
2
3
Microphone
Jack
JJ-033
A/N E08640
1
2
3
Headphone Plug PJ-055
A/N E08941
Microphone Plug
PJ-068, A/N E08942
Copilot
Headphone
1 or 2 A/C speaker
4
Ω
to
∞
¬¬
AF External input
e.g. COM 2, NAV, MKR
Audio OUT to Audio Panel
(as required)
470 R
470 R
¬¬
#20 AWG
#20 AWG
DA-25S
NOTES:
DO NOT
wire other pins than noted!
Unless otherwise noted all wires #22 AWG (0.3 -0.4 mm²).
Unless otherwise noted all Power Grounds are airframe grounds.
Intercom operation requires a microphone which provides audio OUT with the PTT key
de-energized (not keyed).
Intercom operation requires a selector switch, double pole, double throw.
Terminate audio shields at one end only.
Power bus circuit breakers are to be mounted in the A/C breaker panel or instrument
panel such that they will be accessible in flight and safe from physical damage.
* PTT Key/s either at hand-held microphone/s or permanently installed on the yoke.
¬
Wiring without Intercom: connect A/C speaker direct to pins 11 and 15.
¬¬
If more than one AF source, isolation resistors 470 Ohm shall be installed.
¬¬¬
Fuse 3.15 Amp, quick acting, or circuit breaker 3 Amp.
F
IG
. 3-7:
FSG 90F System
H
OOK
-
UP
D
IAGRAM
2 A
MPLIFIED
/C
ARBON
M
ICROPHONES
AND
I
NTERCOM
