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3000B
TECHNICAL
TECHNICAL
TECHNICAL
TECHNICAL DA
TECHNICAL
INST
INST
INST
INSTALLA
INST
ALLA
ALLA
ALLA
ALLATION REQUIREMENTS:
TION REQUIREMENTS:
TION REQUIREMENTS:
TION REQUIREMENTS:
TION REQUIREMENTS:
The FIRECOM System uses only seven wires for total apparatus/radio connection. The signals required are: Mic HI,
Spkr HI, Spkr LO, Radio PTT, Radio PTT Ref, Power, and GND. These signals provide easy connection to a wide variety
of apparatus radios whose input and output circuits are referenced to ground (or other system reference via A-). See
Functional Block Diagram below.
H E A D S E T P T T
PTT REF (10)
PTT TO RADIO (8)
TX HEADSET MIC
TX AUDIO HI (17)
TX AUDIO LO (11)
W W W W W ires & Connections
ires & Connections
ires & Connections
ires & Connections
ires & Connections Are Identified
Connector Pin #
Wire Color
10
8
17
21
13
20
1
Red/Black
11
White/Black
Connector
Shell
DA
DAT T T T T A A A A A
DA
DA
P T T
TX Audio
Adjust
Functional Block Diagram: Intercom 3000B
Are Identified
Are Identified
Are Identified As Follows:
Are Identified
System Function
Orange
Radio PTT Ref.
Black
Transmitter Key
White
Transmit Audio
Green
Receive Audio
Blue
Receive Audio
Red
Power Supply
System GND
TX Audio Low
Shiled
Shield
P T T 1
Squelch
Volume
As Follows:
As Follows:
As Follows:
As Follows:
System Connection
Connect to radio PTT Ref
Connect to radio PTT input
Connect to radio Mic HI
Connect to Radio Speaker HI
Connect to Radio Speaker LO
Connect to switched and fused +12V to + 24VDC
Use 1/2 amp fast blow fuse (See System Specifications)
Connect this wire to DC Negative voltage
Connect to radio mic low
Connect to chassis ground if the intercom is not
directly mounted to the chassis. . . otherwise no
connection is needed
(21) SPEAKER HI
(FROM RADIO)
(13) SPEAKER LO
(FROM RADIO)
HEADSET AUDIO
(20) 12-24 VDC
A+
A-
(1) SIGNAL GROUND
8
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