DAA2 & DAX — P/N 53265:A1 8/24/2011 9
Section 1: General Information
1.1 Overview
This manual describes the DAA2 and DAX digital audio amplifiers, which may be used as devices
on a digital audio loop (DAL). It also describes compatible backup amplifiers and fiber option
conversion modules. They include:
• DAA2 and DAX digital audio amplifiers, which connect directly to the DAL. These boards
each occupy one of the 32 addresses on the DAL.
• BDA backup digital amplifiers, which connect to DAA2 and DAX amplifiers for backup.
Alternately, when used with a DAA2 series amplifier, a BDA can be added to support a
second audio channel.
• Fiber option modules, which convert DAA2 and DAX boards from wire to fiber, as well as
provide compatibility with fiber DVCs and DAAs.
All wire and fiber models of the DVC, DAA2, DAX and DAA are compatible together on a DAL.
Figure 1.1 DAL (Digital Audio Loop) Block Diagram
Digital audio amplifiers are backed up by BDAs, or by another amplifier of the same digital type:
that is, a DAA2 must be backed up by a BDA or another DAA2, a DAX must be backed up a BDA
or another DAX, etc.
DAA-PCA and -PCB boards are described in Appendix C of this manual.
1.2 Standards and Other Documents
The Digital Series products in this manual comply with the following standards:
• NFPA 72 2007 National Fire Alarm Code
• Underwriter Laboratories Standard UL 864
• Underwriter Laboratories of Canada (ULC) ULC-S527-99 Standard of Control Units for Fire
Alarm Systems
• Part 15 Class A conducted and radiated emissions as required by the FCC
The installer should be familiar with the following documents and standards:
NFPA Standards
NFPA 72 National Fire Alarm Code
Underwriter Laboratories
UL 464 Audible Signaling Appliances
UL 864 Standard for Control Unit and Accessories for Fire Alarm Systems
UL 1481 Power Supplies for Fire Protective Signaling Systems
UL 1638 Visual Signaling Appliances - Private-Mode Emergency and General Utility Signaling
DVC
DAA2
DAX
DAA
DAX
DAA2
DAL Address 1
DAL Address 5
DAL Address 3
DAL Address 2
DAL Address 32
Optional return
Connections between any two DAL devices may be either wire or fiber. A
DAL does not need to be all wire or all fiber, but can be a mix of both.
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