44 DAA2 & DAX — P/N 53265:A1 8/24/2011
DAX Digital Audio Amplifiers DAX Overview
• Amplifies one channel of digital audio and distributes it on up to two outputs (50W maximum
for DAX-50, 35W maximum for DAX-35).
• Uploads and downloads via the DVC.
• Up to 106 seconds of digital message storage for use during communication loss (emergency
tone, non-emergency tone, and FFT busy tone) from the VeriFire Tools message library, or
created by the installer.
• Battery charger (35 watt DAXs only).
• Backup amplifier options.
• Programmable through VeriFire Tools.
• Meets UL THD Distortion requirements for 500 Hz to 4 KHz bandwidth.
Meets ULC THD Distortion requirements for 400 Hz to 4 KHz bandwidth.
3.1.3 Specifications
AC Power - TB7
120 VAC, 50/60 Hz input.*
220-240 VAC, 50/60 Hz input.*
*Maximum AC draw varies by DAX model. These draws are given in Appendix A, “AC
Current Draw Calculations”, along with a worksheet to determine the actual AC draw.
Recommended wiring: 12-14 AWG (1.6mm O.D.) with 600 VAC insulation.
Battery Connections - TB8, TB9
Supplied cable connections to batteries for CAB-4. For battery sharing, use 12 AWG either in
the same cabinet or in conduit for no more than 20 ft (6.09 m).
Battery Charger (DAX-35 Boards Only)
Current-limited sealed lead acid battery charger which charges two 12 volt batteries in series,
up to 26AH.
Charger voltage: 27.6 VDC.
For battery calculation worksheet and standby operating times, refer to Appendix B, “Battery
Calculations”, on page 84.
Utilizes wire sizes 12-18 AWG.
Battery Fuse (F2) 10A.
Wire Digital Audio Ports A and B - TB1, TB2
Refer to the Wiring Guide, p/n 52916ADD, for acceptable wire types.
EIA-485 format.
Power-limited.
Refer to Section 5, “Fiber Option Modules”, on page 75 for fiber connections. When a fiber
option module is mounted on a DAX, it disables the corresponding wire terminals. TB1
(Digital Audio Port A) is disabled when a fiber option board is connected at J2. TB2 (Digital
Audio Port B) is disabled when a fiber option board is connected at J3.
Alarm Bus - TB3
Power-limited and supervised by source.
Recommended wiring: 14-18 AWG twisted-pair.
Requires 16 VDC @ 20mA across the terminals to activate. Nominal 24 VDC.
NOTE: 50 Watt DAX boards do not have an onboard battery charger. A UL 864 listed power
supply rated for the battery requirements of the specific application is suitable for charging
purposes.
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