PROEL AUP120, Instruction Manual, Page: 21 / 30

(3) Overload Led
This LED is on when the self-protection process is active .
(4) Main power switch
(5) Tone control
Tone control operates for high and low frequency range between
+/- 10 dB in order to allow the correct reproduced signal equalization
(6) Protection Fuse
Prevent the unit against main power fluctuation and can be replaced .
(7) Terminal screw for emergency power supply
These 2 Terminal screws must be connected to 24VDC emergency
supply to allow the operating continuity in case of black -out.
(8) Power supply Selector 230/117Vca 50/60Hz.
(9) 24Vdc bypass control.
Such control is available contemporaneously to a voice
announcement sent from BM100A or from telephonce central .
(10) Terminal screws for principal speakers output line
These 5 terminal screws are used to connect diffusers of 8
Ω
50 V, 70
V e 100 V ( for music and announcement signal presence).
(11) Terminal screws for secondary speakers line
Such terminal can be used to connect speakers line to 100V (signal
present only for microphone stand call or central telephone call).
(12) Balanced and unbalanced input connectors
For peripheral sources of audio signal to be amplified (pre amplifier,
mixer, or an another amplifier etc.). This input is valid only for signal of
high level.
(13) Balanced and unbalanced output connectors
For connection of amplifiers or power amplifiers in cascade.
(14) Terminal screws for BM100A microphone stand connections.
This microphone stand must be connected as per the following
scheme description. Input is only for signal of high level.
(15) Terminal screws for telephone central connections.
To this input must be connected to a high level audio signal received
from the telephone central . Input to be used only for high level signal
balanced or unbalanced
(16) Gain control for BM100A microphone stand.
(17) Gain control for telephonce central.
(18) Ground-lift Selector
(19) PA-HF Filter.
Allows the PA-HF insertion with break at 400Hz -3dB.
Such filter is necessary when it is necessary to pilot only horn
speakers or diffuse voice signal .