Velleman K4700 Manual De Instrucciones página 31

Connection
16. Connection
First find a proper place to install the protection module (f.i. against the back-side of the housing).
Realise the following connections:
MAINS: this connection has to be linked to the NET-connection of the transformer in the amplifier, i.e.
AFTER the net-switch!
PA: connect this point to the speaker-output of the amplifier, respectively for the left and the right signal (fig
5.0). In case a bridge-amplifier (fig 6.0) is being used, there ought to be two "hot" connections here.
MASS: this point has to be connected to the mass of the amplifier.
LS: to this point the left resp. right loud speaker is to be connected.
To disconnect the loudspeakers manually, realise the following connections:
Install a switch between the points -V and MAN; when the switch is shut the speakers will be disconnected
permanently, when opening the switch again after approx.+/-6 sec the speakers will be reconnected as well.
REMARK. In case of amplifiers with asymmetrical power supply (i.e. having output-elcos and the resistances
R23 to R26) of more than 300W/4 Ohm or 150W/8 Ohm, it is not recommandable to disconnect the
speakers at full power during a longer period, because the just mentioned resistances could burn. In case
the protection module is being used on a bridge-amplifier with asymmetrical power supply, the diodes D7
and D8 should not be mounted; in this case the DC-protection should not be functioning anymore because
the voltage-reference of the protection-module is now opposed to the mass.
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