5. Operation and performance
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PLM+ SERIES Operation Manual rev 3.0.1
5.3.3. Power Average Limiter (PAL)
The Power Average Limiter Active warning (PAL Active) will be displayed when the power supply’s maximum rated
design parameters are reached. When this warning is displayed, gain limiting is being applied to the output signal
and the ISVPL threshold is lowered accordingly.
PAL activity is shown by flashing yellow on the frame LEDs and a corresponding text description on the front and
in Lake Controller and CAFÉ software programs. Refer to section 9.1 for more information on warnings and faults.
5.3.4. Breaker Emulation Limiter (BEL™)
The BEL models the temperature in the external breaker and limits the mains current to prevent the breaker from
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allows current above the threshold to pass for a short time, leading to an increased modeled temperature. For
the limiter to disengage, the current must reduce below the threshold to enable the breaker to cool down.
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momentarily allows current above the threshold for a longer time, leading to an increased modeled temperature.
5.3.5. Under Voltage Limiter (UVL™)
PLM+ devices are equipped with an under voltage limiter. With multiple, powerful devices on a mains distribution
line, heavy current loads risk the reduction of voltage below that required for devices to function. The UVL reduces
the mains current draw when voltage drops below 80 V. The amount of reduction applied increases as mains
voltage drops towards 65 V; at 65 V the power supply is shut down. The mains supply is continually monitored and
value can be set from 1 to 32 Arms, though the PLM 12K44 will automatically limit at between 5-25 and the
PLM 5K44 between 2-15 Arms. Just as with ISVPL, the actual value is displayed in [ ]. The different models have
different maximum current capabilities as specifies in the specification sheet. Also, the smaller models can be
configured all the way up to maximum user range. When the nominal current is set above the model’s capabilities,
the actual current is set to the maximum capabilities of the unit. Therefore, the nominal current can be set for the
application and the configuration remains cross-compatible with all the models. There are three different profiles
available for selection:
The BEL is configured manually from the front panel with the Lake Controller or CAFÉ software. CAFÉs ESP
design aid can also predict the current consumption, with the exact speaker requirements, and propose a
safeguarding BEL configuration
BEL activity is shown by flashing yellow on the frame LEDs and a corresponding text description on the front panel,
in Lake Controller and CAFÉ software programs. Refer to section 9.1 for more information on warnings and faults.
UVL activity is shown by flashing yellow on the frame LEDs and a corresponding text description on the front panel,
in Lake Controller and CAFÉ software programs. Refer to section 9.1 for more information on warnings and faults.
