Data Sheet

Fire Alarm Systems | AL802‑WAL NAC Power Extender (8 A)
AL802‑WAL NAC Power Extender (8 A)
www.boschsecurity.com
u Two (2) Class A or four (4) Class B outputs
u Input to Output Follower mode maintains
synchronization of NAC devices
u AC Fail, Low Battery, and Battery Presence
supervision
u LEDs indicate prior fault on one or more signaling
circuit outputs
u One auxiliary power output (1 A supply current)
with battery backup
The AL802‑WAL NAC Power Extender is a
cost‑effective 8 A remote power supply and battery
charger that can be connected to any 12 VDC or
24 VDC fire alarm control panel (FACP). Its primary
application is to provide notification appliance circuit
(NAC) expansion support that meets Americans with
Disabilities Act (ADA) requirements. It can also be
used to provide auxiliary power to support system
accessories.
Functions
Battery Backup
There is a built‑in charger for sealed lead‑acid or
gel‑type batteries. The enclosure has room for two
12 VDC, 12 Ah batteries. If AC fails, there is automatic
switchover (with zero voltage drop on switchover) to
standby battery.
Inputs
Power input is 115 VAC, 60 Hz, 1.45 A. There are two
normally‑closed (NC) dry contact trigger inputs. The
unit is equipped for two Class A or two Class B FACP
inputs.
NAC Loop Supervision
In non‑alarm conditions, independent loop supervision
for Class A and/or Class B FACP NACs is provided. In
the event of a loop trouble, the FACP is notified by the
steered input (input 1 or input 2). In addition, there
are common trouble output terminals (NC, C, NO) that
are used to indicate general loop or system trouble. A
common trouble input is provided for optional
normally‑closed (NC) devices to report trouble to the
FACP. Two FACP signaling outputs can be employed
and directed to control supervision and power delivery
to any combination of the four outputs. The unit also
has Loop Output trouble memory indication to help
identify troublesome sporadic problems.
Outputs
The AL802‑WAL delivers electronically regulated and
filtered 12 V or 24 V power to Class B or Class A NAC
loop circuits. Additionally, a separate 1.0 A auxiliary
output for four‑wire smoke detectors is available. The
8 A maximum alarm current can be divided among the
four outputs for powering NAC devices. Each output is
rated at 2.5 A maximum. The outputs are Class 2 rated
power limited outputs with auto reset thermal and
short-circuit protection.