ATEIS DPAfour125 - Manual (Page 3)

DPAfour Series User Manual
www.ateis-europe.com Page 3 of 11
1. Introduction:
The DPAfour is a 2U high 19” rack mountable, 4-channel class-D power amplifier, transformer isolated
for 100V, 70V, 50V and low-impedance distributed loudspeaker systems.
These amplifiers have a dual voltage mains 115/230 VAC and a 24 VDC battery back-up input which
allows it to be used in combination with a battery backup system for maximum availability and
durability in an emergency evacuation system.
There are 3 types of power amplifiers available in the DPAfour range of products.
2. General description
The DPAfour (Digital Power Amplifier) is designed for any public address or voice alarm system
application.The DPAfour amplifiers were specifically developed to meet the requirements of EN54-16 and
can therefore also be used as part of fire detection and fire alarm systems.
For safety installations, each amplifier module is fitted with its own 230 VAC/24 VDC power supply for
increased system reliability. To avoid handling errors, the gain setting for each amplifier channel is set
using the potentiometer located at the back of the apparatus. In addition to standard electronic protection,
DPAfour amplifiers also have electronic and thermal protection to protect them from all potential hazards.
A fan provides forced cooling for the final power shelves and internal parts of the apparatus. It starts
automatically when the temperature reaches a certain threshold, and stops when it returns to normal
values. The functionality of the cooling system is monitored by the internal control system.
The indicators on the front panel will display the status of each amplifier: AC or DC power supply, any
internal fault and the presence of audio and/or audio overload.
The DPAfour amplifier series can be ordered with optional 115V power supply. Please contact your local
dealer or your regional Ateis branch office.