ATEIS SPA 2120 - Manual (Page 6)

SPA series
Page 6 of 11
4. Product Description:
The SPA (Security Power Amplifier) is designed for perfect integration into the SINAPS system, but thanks to its
flexibility, it can also be used for any Public Address application.
The SPA amplifiers were specifically developed to meet the requirements of EN 60849 for safety installations. Each
amplifier module is fitted with its own 220 VAC/24 VDC power supply for increased system reliability. To avoid
handling errors, the volume output is set using the potentiometer located at the back of the apparatus. In addition to
standard protection via fuses, SPA 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 up
automatically when the temperature reaches a certain threshold, and stops when it returns to normal values.
Four LEDs display the status of each amplifier: AC or DC power supply, Line Overload and Temperature overload.
Furthermore, a three LEDs Vu-Meter indicates the presence and level of audio signal.
A surveillance circuit continuously monitors the temperature and the presence of AC and DC power supplies for both
amplifiers. In case of a problem, the overload LEDs will be switched ON and the Fault relay will be activated.
SPA series can be ordered with optional 115V power supply. Please contact your local dealer or your regional Ateis
branch office.
5. SPA Series Front Panel Features:
For each amplifier channel, there are indicators LEDs in order to indicate the amplifier status.
VU Meter:
The VU-meter is composed of three LEDs that represent three different level thresholds: -40dB, -20dB and 0dB.
When the input signal reaches those thresholds, the corresponding LED will blink.
Overload:
The overload LED will blink as soon as the output power exceeds the nominal value. If the Overload LED is blinking,
check that the output load is well connected and still in good condition as well as checking the level of the input
signal.