190-01878-02
GMA 342/345 Installation Manual
Revision 5
Page C-7
APPENDIX C INTERCONNECT DRAWINGS
Figure C-7 LEMO Connector Example Interconnect Drawing
RED
BLK
WHT
BLU
WHT
WHT/BLU
LEMO JACK PINOUT
LEFT HEADSET AUDIO
RIGHT HEADSET AUDIO
HEADSET AUDIO LO
BLK
BLK
RED
BLK
WHT
BLU
WHT
WHT/BLU
LEMO MONO CONNECTION DIRECT TO AUDIO PANEL
1. +VIN
2. GND
3. HEADSET L
4. HEADSET R
5. MIC HI
6. MIC LO
BLK
1/4 INCH HEADSET JACK
PTT
MICROPHONE HI
MICROPHONE LOW
MICROPHONE JACK
GMA AUDIO PANEL
LEFT HS
MIC HI
MIC LO
+10-32 VDC
1/2 AMP BREAKER
PTT*
H
S
M
I
C
6 PIN LEMO JACK
TO UNIT BACKSHELL
USING SHIELD BLOCK.
TERMINATE USING
RING TERMINAL.
TO UNIT CONNECTOR
PTT
AIRCRAFT GROUND
SHIELD BLOCK GROUND
WIRE SPLICE
MOMENTARY CONTACT
PUSH BUTTON
GMA AUDIO PANEL
MIC HI
MIC LO
M
I
C
NOTE FOR HAND MICS:
THE CONNECTION BETWEEN PTT AND THE MIC JACK TIP IS
REQUIRED IF HAND MICS WILL BE USED. *DENOTES ACTIVE LOW.
SEE BELOW FOR EXAMPLE.
PTT*
PTT
*DENOTES ACTIVE LOW.
LEMO STEREO CONNECTION TO EXISTING JACKS
RED
GMA AUDIO PANEL
HEADSET LO
LEFT HS
RIGHT HS
MIC HI
MIC LO
+10-32 VDC
1/2 AMP BREAKER
H
S
M
I
C
PTT*
PTT
LEMO SHIELD WIRES
CONNECT TO GMA SHIELD
BLOCK USING RING
CONNECTORS
ALL SPLICES FROM LEMO
JACK OCCUR AT GMA END OF
HARNESS
ALL SPLICES FROM LEMO
JACK OCCUR AT GMA END OF
HARNESS
LEMO SHIELD WIRES
CONNECT TO GMA SHIELD
BLOCK USING RING
CONNECTORS
RIGHT HS
NC
CONNECT LEMO GROUND TO
THE SHIELD BLOCK OF THE
AUDIO PANEL
CONNECT LEMO GROUND TO
THE SHIELD BLOCK OF THE
AUDIO PANEL
BLK
RED
BLK
WHT
BLU
WHT
WHT/BLU
LEMO STEREO CONNECTION DIRECT TO AUDIO PANEL
1. +VIN
2. GND
3. HEADSET L
4. HEADSET R
5. MIC HI
6. MIC LO
BLK
GMA AUDIO PANEL
LEFT HS
MIC HI
MIC LO
+10-32 VDC
1/2 AMP BREAKER
PTT*
6 PIN LEMO JACK
PTT
LEMO SHIELD WIRES
CONNECT TO GMA SHIELD
BLOCK USING RING
CONNECTORS
RIGHT HS
CONNECT LEMO GROUND TO
THE SHIELD BLOCK OF THE
AUDIO PANEL
BLK
LEMO MONO CONNECTION TO EXISTING JACKS
RED
BLK
WHT
BLU
WHT
WHT/BLU
BLK
GMA AUDIO PANEL
+10-32 VDC
1/2 AMP BREAKER
H
S
M
I
C
PTT
LEMO SHIELD WIRES
CONNECT TO GMA SHIELD
BLOCK USING RING
CONNECTORS
ALL SPLICES FROM LEMO
JACK OCCUR AT GMA END OF
HARNESS
CONNECT LEMO GROUND TO
THE SHIELD BLOCK OF THE
AUDIO PANEL
NC
HEADSET LO
LEFT HS
RIGHT HS
MIC HI
MIC LO
PTT*
1. +VIN
2. GND
3. HEADSET L
4. HEADSET R
5. MIC HI
6. MIC LO
1. +VIN
2. GND
3. HEADSET L
4. HEADSET R
5. MIC HI
6. MIC LO
1. +VIN
2. GND
3. HEADSET L
4. HEADSET R
5. MIC HI
6. MIC LO
6 PIN LEMO JACK
6 PIN LEMO JACK
6 PIN LEMO JACK
BLK
RED
BLK
WHT
BLU
WHT
WHT/BLU
BLK
BLK