Power Switching / Remote On/Off-Switching - Bose Entero 440 Guia Del Instalador

8. Power Switching / Remote On/Off-Switching

8. Power Switching / Remote on/Off-Switching
There are two options to switch the amplifier on and off.
Option 1 – Local Switching:
A power switch is located at the rear panel of the amplifier. This switch is connected as a regular power
switch with plain on/off switching. If the unit is switched on with this power switch, the remote
switching options are disabled. For remote switching options, the regular power switch should be always
in the OFF-position.
Option 2 – Remote Switching with 12 VDC-Control Voltage:
The PHOENIX terminal connection is used for remote switching with control voltage (DC). Terminal 1 and
2 are used as control voltage input. Supplying the control voltage to these terminals will switch the
amplifier ON. Additionally the terminals 4 and 5 will be fed with the control voltage after a delay of one
second. These terminals can be connected to the terminals 1 and 2 of the next amplifier for sequential
switching. Up to 20 units can be daisy-chained this way for sequential switching of the entire group of
amplifiers.
The control voltage doesn't need to be supplied continuously, only a short impulse is necessary to initiate
the switching-on procedure of the amplifier, but the control voltage must be supplied until the last
amplifier in the daisy-chain setup is switched on.
By supplying the inverted DC control voltage to terminal 1 and 2, the amplifier will be switched off. As for
the switching-on procedure, this control voltage will be fed to the terminals 4 and 5 as supply of the
control voltage for the next daisy-chained amplifier. For the switching-off sequence, no delay is engaged.
All amplifiers are switched of at the same moment.
As long as no control voltage is fed to the terminals 1 and 2, the amplifier will stay in the actual state
(on or off).
Remote Switching PHOENIX Connector:
1 – Amplifier Switching POSITIVE terminal
2 – Amplifier Switching NEGATIVE terminal
3 – not connected
4 – Control Voltage supply for sequential switching of
next amp POSITIVE terminal
5 – Control Voltage supply for sequential switching of
next amp NEGATIVE terminal
1 2
Control Voltage: 12 VDC / 40mA per amplifier.
3 4 5
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