Bosch AL802-WAL NAC Power Extender (8 A)

• Two (2) Class A or four (4) Class B outputs
• Input to Output Follower mode maintains synchronization of NAC devices
• AC Fail, Low Battery, and Battery Presence supervision
• LEDs indicate prior fault on one or more signaling circuit outputs
• 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.

Output Programming
Each output can be independently programmed forSteady, Temporal Code 3, or Strobe synchronization.All outputs can be programmed for Input to OutputFollower mode.

Paralleling Outputs
An individual output of 4 A can be obtained byparalleling two outputs.Horn and Strobe SynchronizationThe two-wire synchronization mode works with theGentex Commander GOS Sync Mode 3, 4 and ST/HSseries, the System Sensor SpectrAlert series of horns,strobes, and horn strobe combinations, and CooperWheelock horns, strobes, and horn strobecombinations to provide a means of synchronizing thetemporal-coded horns, synchronizing the flash timingof the strobe, and silencing the horns of the horn strobe combination over a two-wire circuit whileleaving the strobes active.