Page 4-8
GMA 1347D Installation Manual
Revision C
190-00303-21
4.3.6 Speaker
The speaker output is capable of driving up to 10 Watts into a 4
Ω
or 8
Ω
speaker.
Table 4-8. Speaker Pin Assignments, J3472
Pin Pin
Name
Description
I/O
41
SPEAKER AUDIO OUT LO
Ground reference for speaker audio
--
42
SPEAKER AUDIO OUT HI
Speaker audio output
Out
4.3.7 Digital
Audio
The following Inputs and Outputs are used in a digital installation.
Table 4-9. Digital Audio Pin Assignments, J3472
Pin Pin
Name
Description I/O
8
ON-SIDE COM MIC DIGITAL
AUDIO OUT
COM 1 Mic digital output for GMA #1
COM 2 Mic digital output for GMA #2
Out
9
ON-SIDE COM DIGITAL AUDIO IN
COM 1 digital input for GMA #1
COM 2 digital input for GMA #2
In
47
CROSS-SIDE COM MIC DIGITAL
AUDIO OUT
Not used in dual installations
Out
48
CROSS-SIDE COM DIGITAL
AUDIO IN
COM 2 digital input for GMA #1
COM 1 digital input for GMA #2
In
28
ON-SIDE NAV DIGITAL AUDIO IN
NAV 1 digital input for GMA #1
NAV 2 digital input for GMA #2
In
68
CROSS-SIDE NAV DIGITAL
AUDIO IN
NAV 2 digital input for GMA #1
NAV 1 digital input for GMA #2
In
49
SECONDARY DIGITAL AUDIO
CLOCK OUT
Out
50
SECONDARY DIGITAL AUDIO
CLOCK IN
Digital data pins for synchronization
between two audio panels in a dual
installation
In
29
ONSIDE VOICE ALERT DIGITAL
AUDIO IN
Digital input for on-side voice alert audio
In
61
CROSS-SIDE VOICE ALERT
DIGITAL AUDIO IN
Digital input for cross-side voice alert
audio
In
17 COM
SWAP*
In
18 PROGRAM
GROUND
When enabled, COM1 and COM2 are
swapped.
--
*Denotes Active Low (Inputs: ground to activate; Outputs: grounded when active).
4.3.8 PA
MUTE
PA MUTE is an output that is grounded when active. It is used to trigger the mute function on
an external PA system.
Table 4-10. PA MUTE Pin Assignments, J3472
Pin Pin
Name
Description
I/O
64
PA MUTE* OUT
Output capable of sinking 500 mA to ground
Out
*Denotes Active Low (Inputs: ground to activate; Outputs: grounded when active).
