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Pin No
Name
42
MIC TO SVS 1 HI
43
INPUT GND
44
RESERVED
45
RESERVED
46
USB GND
47
RESERVED
48
RESERVED
49
INPUT GND
50
INPUT 2
51
INPUT 1
52
INPUT 5 (LIGHTING)
53
INPUT 3
54
INPUT 4
55
INPUT GND
Necessary Connections
»
Power Supply
»
Audio System
»
Inputs
»
Outputs
Power Supply
The SVS unit and other components require aircraft DC power. Operating range is 12-32VDC. It is
recommended that the SVS be connected to the emergency (primary) power bus on the aircraft.
This is to ensure successful operation of emergency calls.
When operating on a nominal 28V supply, a 2-amp circuit breaker/fuse is recommended to protect
the SVS system.
The SVS has a non-resettable internal 5A fail-safe fuse to protect the aircraft power bus from major
malfunctions.
Audio
Audio from the SVS to the Aircraft Audio System
The SVS supports an isolated audio channel for each of the Iridium SATVOICE channels installed
in the unit. Audio from the SVS is connected direct to the ICS input, and its levels adjusted using
the SVS setting.
Audio from the ICS to the SVS (microphone installation)
The SVS can be installed in aircraft systems with either high impedance or low impedance
microphones. Most (but not all) civil aircraft operate high impedance (electret) microphone
systems. Most (but not all) military aircraft operate low impedance microphone systems. Refer to
www.flightcell.com/resources
117-00002 Flightcell SVS Installation Manual Rev 1.2 Effective date 20 September 2023
Description
ICS1 Audio port
Input Ground return
USB Upgrade port
Input Ground return
Input 2 - EMCON Mode
Input 1 - Aural Notification Suppression
Input 5 - Lighting level input 0-28VDC Signal
Input 3 - Modem 1 Call Answer/Terminate
Input 4 - Modem 2 Call Answer/Terminate
Input Ground return
for wiring diagrams for the microphone connections.
Direction
INPUT
-
-
-
GROUND
-
-
Ground
INPUT
INPUT
INPUT
INPUT
INPUT
GROUND
Page 13
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