GAI-Tronics 10959-908 Rack-Mount Audio Messenger Interfaces - Manual (Page 11)

Pub. 42004-487A
M ODEL 10959-906 & 10959-908 R ACK -M OUNT A UDIO M ESSENGER I NTERFACES P AGE
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Table 1. Audio Assignment
Termination PCBA
Label
Internal Terminal
Pin-Out Function or ACT Description
600-ohm L1 TB3-1 600-ohm audio pair to distribution amplifier cabinet,
Stanchion Broadcast electronics module, Addressable
Amplified Speaker, or other 600-ohm compatible devices.
600-ohm L2 TB3-2
AUDBUS2 L1 TB3-3
No connection
AUDBUS2 L2 TB3-4
AUDBUS1 L1 TB3-5
No connection
AUDBUS1 L2 TB3-6
PGND TB3-7 No connection
RS485 INT GND TB3-8
No connection RS485 INT− TB3-9
RS485 INT+ TB3-10
Control Output Connections
Terminal block TB4, labeled SYSTEM , is located on the Termination PCBA. It provides connection for a
contact closure output to activate the public address system (central amplifier input, Amplified
Addressable Speaker input, etc.).
Table 2. System Assignment
Termination PCBA
Label
Internal Terminal
Pin-Out Function or ACT Description
EXT DATA GND TB4-1 No connection
EXT DATA − TB4-2
No connection
EXT DATA + TB4-3
FLT TB4-4 No connection
REBOOT TB4-5 No connection
GND TB4-6 No connection
AUD ACT 1 TB4-7
Isolated solid state relay, closed during AMI broadcast
On resistance = 30 ohms
AUD ACT 2 TB4-8
The following connections are not used by the Model 10959-906 and 10959-908 Audio Messenger
Interfaces:
• Digital outputs (TB1)
• Digital inputs (TB2)
• Auxiliary Audio (TB5)