Cadac C-Type - Manual (Page 60)

8-2 External connections
C-Type Revision C2005-2
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* Line requires connection to GND to select function
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PRGXOH
PIN 1 MD TO TALKBACK 1 SELECT *
PIN 14 MD TO TALKBACK 2 SELECT *
PIN 2 MD TO AUX 1 SELECT *
PIN 15 MD TO AUX 2 SELECT *
PIN 3 MD TO AUX 3 SELECT *
PIN 16 MD TO AUX 4 SELECT *
PIN 4 MD TO FOLDBACK SELECT *
PIN 17 MD TO PLAYBACK SELECT *
PIN 5 N/C
PIN 18 RTB 1 CONTROL LINE *
PIN 6 MD O/P (+)
PIN 19 MD O/P (–)
PIN 7 MD O/P (+)
PIN 20 MD O/P (–)
PIN 8 GND
PIN 21 GND
PIN 9 0V
PIN 22 0V
PIN 10 MD MICROPHONE (+)
PIN 23 MD MICROPHONE (–)