UP-67ETH, UP-127ETH,
UP-247ETH, UP-367ETH
Digital power unit
UP-x7ETH version 1.1
11
4.7. FAIL relay
Solid state relay. It switches when:
a)
The power supply of the amplifier fails.
b)
The maximum temperature set by the P.A.
Manager software is exceeded.
c)
The connection in both Ethernet inputs (ETH A
and B) is lost.
d)
A high impedance / open line fault is detected
in the loudspeaker line.
e)
An internal communication or firmware error
is detected in the amplifier.
4.8. Loudspeaker line outputs
The loudspeaker line output is effected by means
of a transformer that has low impedance (4-8-16
ohms) and high impedance (50-70-100 V)
outputs.
The connection must be made between terminal
"0" and the terminal corresponding to the
selected impedance or voltage.
When working with the 50, 70 and 100 V lines, it
should be remembered that:
The loudspeakers must be equipped with a
line transformer.
The total connected power will be the sum of
the power absorbed by the loudspeakers and
this must be between 50% below and 20%
above the rated power of the amplifier.
The power absorbed by a loudspeaker with a
transformer is indicated on a 100 V line. If
the amplifier is connected to the 70 V line, it
will absorb half the indicated power, and if it
is connected to the 50 V line, it will absorb a
quarter of this power.
Figure 3
Total power absorbed: 60 W
Power absorbed by each
transformer: 12 W
Total power absorbed: 60 W
Power absorbed by each
transformer: 6 W
Total power absorbed: 60 W
Power absorbed by each
transformer: 3 W
