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Bittner Audio - Application Handbook
2.
Technical Features
2.1.
AC Power Switch
The main power switch is located on the rear panel of the unit. If the remote switching option is
not being used, the device must be switched on and off with the main power switch. To use the
remote power switching option, the main power switch must be turned off.
2.2.
Remote Switching
2.2.1.
Control Voltage XB XV XR 4X 8X
The PHOENIX terminal block (see picture below) is used to remotely power up the amplifier with a
control voltage (12 VDC 80mA). Terminal
IN
is used as the control voltage input. Feeding these
terminals with the control voltage will switch the amplifier on.
After a delay of one second the control voltage will appear on the terminals labeled
OUT
of the
PHOENIX terminal block. The
OUT
terminals may be connected to the terminals
IN
of the next
amplifier for sequential power switching. Up to 16 units may be daisy-chained this way.
The control voltage must be applied until the last amplifier in the daisy-chain is being switched
on. By supplying the inverted DC control voltage to terminal
IN
, all connected amplifiers will be
switched off.
Remote Switching PHOENIX Connector:
IN+
Amplifier Switching POSITIVE terminal
IN-
Amplifier Switching NEGATIVE terminal
OUT+ Control Voltage output for sequential switching POSITIVE terminal
OUT-
Control Voltage output for sequential switching NEGATIVE terminal
2.2.2.
SXL & RS-485 XR 4X 8X
If the device is connected to a Bittner Audio SXL or via the RS-485 interface to a PC (XR only), the
unit can be remotely switched on and off at any time.
2.3.
LED Indicators
The amplifiers are equipped with 4 LEDs for each amplifier channel:
CLIP, SIGNAL, PROTECT and POWER
LED
Color Function
POWER
green The amplifier is powered up
CLIP
red
The input is overloaded. The LED starts illuminating as soon as the signal is
0.5 dB under full power.
SIGNAL
green The signal reaches the output stage of the amplifier.
PROTECT Red
This LED will light up as soon a protection circuit has been activated or if
one of the output relays has been activated. When the amplifier is
switched on, this LED will light up for approximately 1.5 seconds.