Audio Control Panel Pinouts

Power 28 VDC, M
DC GND, N
GND, D
Panel Light 5V, A (Hi), B (Lo)
Dim/Bright Input 6.3 VDC R / P (Gnd)
Light Test, C
ARINC 429 Data Input –  K, J (connect K to output A and J to output B on ARINC board)
ARINC 429 Data Output – H, G (connect H to input A and G to input B on ARINC board)
Shield Gnd, X

ACP Pinout PDF