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3.1.2 AX-PSU-6 Battery Circuit Wiring
AX-PSU-6 Battery Charger
Charger current 1.5A (Maximum 45Ah).
Supervised,
Non-Power
Limited.
Charging voltage 27.4 VDC typical.
Charging
temperature
compensated.
Start the power supply charger on AC power first then
connect the batteries.
If AC power is not available the power supply charger
can be started directly from the batteries. Connect
batteries and press the “START FROM BATTERY”
push button.
The battery charger provides deep discharge
protection. Battery power will be disconnected when
voltage falls below 19V (nominal). If the batteries are
disconnected, the charger output is turned off.
The internal series resistance of the batteries is
continuously checked. If the internal series resistance
increases above 0.8
Ω
then the power supply charger
will indicate a trouble condition.
3.1.3 AX-PSU-6 Additional Wiring
The AX-PSU-6 24 VDC power output is prewired to the
AV-AMP-80 audio amplifier module in both the AV-VBM
and AV-VB panels. The trouble/fault relay contact is
prewired in the AV-VBM to the AV-SM switch/LED
module. In the AV-VB the trouble/fault relay contact
must be monitored by the host fire alarm control panel.
The trouble relay contact is a fail-safe relay which
transfers on loss of power or any other power supply
charger trouble condition.
Note: The power supply trouble/fault relay contact,
in addition to the trouble relay contact, located on
the AV-AMP-80 audio amplifier module, are prewired
in the AV-VBM panel to the AV-SM switch/LED
module. These contacts located in both the AV-VBM
and AV-VB must be monitored by the host fire alarm
control panel to maintain proper supervision of the
AV-VBM audio panel w/microphone and AV-VB
distributed audio booster. If the AV-VB is utilized as
a PBUS (485) amplifier the AX-PSU-6 power supply
trouble/fault relay contact gets wired to input 1 of
the associated AV-AMP-80.