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3.2.1.1 PBUS (485) AV-AMP-80 Wiring
As previously indicated, AV-VB distributed audio boosters can also be configured for use in Axis
AX
PBUS (485)
amplifier installations. When an AV-VB is utilized in this configuration, the amplifier is wired as a PBUS (485) floor
(area) amplifier. As a PBUS (485) floor (area) amplifier the amplifier is connected an Axis
AX
fire alarm control
panel’s AX-CTL base card (PBUS) and all control / operation is done via the associated base card. In addition to
wiring to an AX-CTL base card, the amplifier will also monitor the associated AX-PSU-6 power supply and report its
status to the AX-CTL base card (see figure 5).
Note: For additional information regarding AV-VB distributed audio booster PBUS (RS485) use, refer to the
associated Axis
AX
audio fire alarm control panel manual.
OUT- OUT+ IN- IN+
AMP1
OUT- OUT+ IN- IN+
AMP2
+24V GND +24V GND
POWER
B A B A
RS485
AMP-1
A+ A- B- B+
AMP-2
A+ A- B- B+
INPUTS
IN1 GND IN2 GND IN3 GND
TROUBLE
COM NO NC
TX
HB
AMP1
AMP2
40V
USB
4.7K EOL
Microphone Bus Input
To Dedicated AX-PSU-6
24VDC (terminals 0V and +V0)
To AX-CTL Base Card
PBUS (RS-485)
Class B Only
Class “A” Wiring
Class “B” Wiring
Installed Microphone Supervision Plug
To Dedicated AX-PSU-6
Trouble Relay Contact
(terminals COM and NO)
S SSS
S SSS
Microphone Bus EOL (end-of-line) or
to next AV-AMP-80 Area Amplifier
PBUS (RS485)
Address Switch
To Next PBUS
(RS-485) Module
Two (2) Class A or B Area Amplifier Circuits (circuits
activate in tandem)
Note: In the AV-AMP v1.1.1 or higher, amplifier
message programming tool, amplifier 2 can be
configured as a backup to amplifier 1.
Figure 5 – PBUS AV-AMP-80 Floor (area) Wiring
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