Bosch IRIS-Net User Manual page 291

IRIS-Net
The LOAD indicator shows whether the load connected to the amplifier output is within the
allowable range or if short-circuit or line interruption has occurred.
The green OK-indication signals that the connected load is between the specified lower and upper
limit values. The red OPEN indication signals line interruption. It lights whenever the connected load
exceeds the upper limit value. The red SHORTED indication signals short-circuit at the amplifier
output. It lights whenever the connected load falls below the lower limit value.
HINT: The connected load is monitored continually as soon as a signal with a voltage of > 150 mV
is present at the output. Calculation of signal levels below that threshold is not possible and the
indicator shows the last acquired state.
The TEMP display shows the amplifier's internal temperature as a graph. The indicator lights green
whenever the amplifier is operated in its nor- mal operational temperature range. The indicator
lights yellow whenever the amplifier builds up heat because of continuous high output. However,
since the internal fans provide sufficient ventilation there is no risk of thermal overload in this state.
As soon as temperature indication changes to red, reducing the output level is strongly
recommended. Otherwise the amplifier might cease operation because of thermal overload.
The MUTE indicator lights when the amplifier is muted. This occurs e.g. during speaker switch-on
delay.
When the red PROTECT indicator lights, one of the internal protections (thermal overload, short-
circuit, Back-EMF, HF at the output, etc.) has been activated.
The LIMIT indicator lights as soon as the internal dynamic limiter is activated, which is the case
when the amplifier is operated at maximum out- put. Short-term blinking is not a problem, since the
internal limiter controls input levels of up to +20dBu down to a distortion rate of approximately 1%.
However, if this indicator lights permanently, reducing the output level is strongly recommended to
protect the connected loudspeaker systems from being damaged by capacity overload.
The Output Level Meters provide indication of the corresponding audio levels at the amplifier
outputs. Indication in dB is relative to amplifier full-modulation. A 0dB output level (full-modulation)
is indicated in yellow.
The MUTE button is for attenuating the output level of the corresponding amplifier output to –∞.
Clicking the MUTE button with the left mouse button mutes the corresponding amplifier output. The
MUTE button is virtually pressed and lights red.
Clicking the MUTE button once again with the left mouse button disables the mute-function and the
amplifier output is again active. The MUTE button is virtually disengaged and not lit.
MAX. OUTPUT PWR indicates the configured maximum output power of the channel (for 4 and 8
channel amplifiers only).
MIN. IMPEDANCE indicates the configured minimum impedance of the channel (for 4 and 8 channel
amplifiers only).
GAIN/SENSITIVITY displays the amplifiers constant gain (for 4 and 8 channel amplifiers only).
Clicking on the VLD SET button of a 4 or 8 channel amplifier opens the VLD tab in the Setup &
Control window. The LED indicator next to the button lights when VLD of the channel is activated.
Bosch Security Systems B.V. User Manual
REMOTE AMPLIFIER | en
2017.05 | 3.20 | F.01U.119.956
291