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© 2006, Elektro-Automatik GmbH & Co. KG
Irrtümer und Änderungen vorbehalten
EN
Instruction Manual
PSI 800 R Series
Date: 05-13-2011
3. Functional description
3.1 General
The power supply is pre-configured to 0V output and
100% output current. The power of 5000W is not
adjustable, but it is limited. It means that there is a
power limiter which has priority over the current limiter.
The output voltage is supervised regarding adjustable
over- and undervoltage thresholds.
The control panel is used to manually adjust output
values and settings. Remote control is either done
with the analogue interface or a digital interface card.
3.2 Remote sense
In order to compensate voltage drops along the load
leads, the device features remote sense inputs. Here
the sensed voltage from the load is connected with
correct polarity. Remote sense can compensate up to
a certain level, see technical specifications for value.
When not using the sense inputs, they just remain
open. It is not required to bridge them to the output.
The cross section of the sense leads is non-critical.
3.3 Overvoltage protection (OVP)
An important feature is the overvoltage protection
which can be adjusted in the setup from 0...110%
output voltage. In case of an overvoltage condition,
whether caused by an internal defect or by external
reasons, the power output is switched off and the
error is indicated by the a status text „OVP“ in the
display and also by pin „ERROR“ of the analogue
interface. The error indication remains in the display
until acknowledged by button
.
After the OV condition is gone and acknowledged,
the output can be switched on again.
3.4 Overtemperature (OT)
The device also features an internal temperature
supervision. In case of overheating, the power output
will be temporarily switched off until the device has
cooled down, and then automatically switch on again.
The state of the output after an OT error can be
configured in the setup. During an OT condition a
status text „
auto ON
“ indicates that the output will
be on after the OT condition has gone. This can be
deactivated by the parameter „
OT disappear = OFF
“.
The error indication remains in the display until it is
acknowledged by the button
.
The condition is additionally indicated by pin „ERROR“
of the analogue interface.
3.5 Output restoration after mains blackout
After a mains blackout, which is considered the same
as switching the input voltage off by hand, the device
will reconstruct the last condition by restoring output
state and set values.
The output state restoration can be deactivated in the
setup menu by the parameter „
Power ON = OFF
“,
while „
Power ON = restore
“ will set the output to the
last condition before the blackout.
3.6 Undervoltage supervision
The supervision of an undervoltage condition is done
with two thresholds. It will be activated 250ms after
the output is switched on and has a response time of
1s, in order to avoid switching the output off during
short-time voltage drops.
In case the output voltage is below the 1st under-
voltage threshold „
UV warning
“ after the output has
been switched on, the display will indicate a warning
. The warning remains in the display until acknow-
ledged by the button
. This prevents errors from
being unnoticed by the user. The warning is removed
if no error is persistent anymore and after it has been
acknowledged.
The 2nd undervoltage threshold („
UV shutdown
“) will
generate an alarm if the output voltage falls below and
switch off the output. This is indicated by
and at
the „ERROR“ pin of the analogue interface.
The output can be switched on again, after the alarm
has been acknowledged.
About the device