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Setting protection thresholds Basic operation
However, some times you may wish to limit the output settings allowed values to
protect sensitive loads that will not tolerate the full output ratings.
For that end you use the limit parameter (Vlim and Ilim): the values you program for
the limit parameter are used as upper limits when you program output settings.
To set values for the limit parameter, proceed as follows:
Select the power module to program (see: first operation steps chapter
for details).
Select the LIM parameter (use the up / down selection keys) and enter
programming mode (press the SET key) or enter programming mode
and then select the LIM parameter (see: Programming power module
parameters at the beginning of this chapter).
Set voltage and current values for the limit parameter (see:
Programming power module parameters at the beginning of this
chapter).
Proceed to program other power module parameters or exit
programming mode by pressing the SET key.
Setting protection thresholds
To protect the connected load from excessive output voltage or current delivery by
the power module that feeds it, protection mechanisms are continuously monitoring
the module’s output voltage and current.
When the output’s voltage or current exceed a pre-defined level a fault event is
generated and the power module shuts down.
If the power module’s control circuit ascertains that the module cannot shut down its
output the XMP’s main controller is informed and the main converter is shut down.
Protection thresholds are set using the PROT parameter.
Protection
parameter
display
When viewing (in status mode) or programming the protection parameter, the
operating mode and foldback selection indicators that are usually shown on the
display’s upper row are replaced with an indicator of protection threshold setting
method, as illustrated below.
Parameter
value
setting
metho
d
cursor
syste
m
symbol
system status
or instructions
condense
d
modules status
Entry
guidance
Display in programming mode showing PROT values
50 XMP 2600 User’s Guide rev. 1.0