Terminal Blocks and Terminals
TBl = Input from Remote Microphones 1 and 2.
l
TBl-1 = Push-to-Talk, red wire.
l
TBl-2 = Push-to-Talk, black wire.
l
TBi-3 = SHIELD.
l
TBl-4 = Microphone, green wire.
l
TBl-5 = Microphone, white wire.
1
Remote Microphone 1
l
TBl-6 = Push-to-Talk, red wire.
l
TBl-7 = Push-to-Talk, black wire.
l
TBl-8 = SHIELD.
l-
Remote Microphone 2
l
TBl-9 = Microphone, green wire.
l
TBl-10 = Microphone, white wire.
TB2 = Network Audio Input (used if system ties to other systems).
l
TB2-1 = Audio +.
l
TB2-2 = Audio -.
l
TB2-3 = SHIELD.
l
TB2-4 = Audio +.
l
TB2-5 = Audio -.
l
TB2-6 = SHIELD.
“Daisy-Chain” Input (1 V p-p or 25VRMS input signal)
“Daisy-Chain” Output
TB3 = Provide hardwired termination points for Local Speaker.
l
TB3-1 = Speaker + (in parallel with P6-1).
l
TB3-2 = Speaker - (in parallel with P6-2).
l
TB3-3 = Not used.
MESSAGE EXPANSION CARD (562-972)
Features and Functions
An optional card that, if used, (1) plugs into the Audio Controller Board, and (2) generates voice/tone messages for
Audio Channel 2.
Component Locations and Functions (Figure 37)
LED1
Lights when there is a trouble associated with the board.
The 740-636 programmable EPROM contains the card’s program.
Identical in function to Switch SW1 in an 8-Zone Monitor Card.
Jumpers
JW6 or JW7 = JW6 if Socket Jl contains a Backup VTG card (see below). Otherwise JW7.
NOTE:
All other jumpers on the card are factory set. DO NOT CHANGE.
Connectors and Connector Sockets
Pl = Plugs into Socket Jl on the Audio Controller Board.
Jl = Socket for optional Backup VTG card (see below).
62
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