Analog Interface Connection; Functional Description; General; Remote Sense - Elektro-Automatik EA-PSI 800 R Bedienungsanleitung

About the device
2.4

Analog interface connection

The 12 pole analog interface on the top side is of type
press & clamp. It is eligible for cable cross sections of
0.1mm² (26 AWG) to 0.5mm² (20 AWG). If possible,
use cable end sleeves.
Attention! Never connect grounds of the analog
interface to minus (negative) output of an ex-
ternal control application (PLC, for example), if
that control application is already connected to
the negative power supply output (ground loop).
Load current might flow over the control leads
and damage the device! In order to avoid this a
fuse can be integrated in the „weak" ground line.
Clamping procedure:
3.

Functional description

3.1

General

The power supply is pre-configured to a certain volt-
age and current.
The output voltage is supervised for adjustable un-
dervoltage thresholds.
The control panel is used to set conditions, set up
the device and to adjust output values. Alternatively,
the device can be remotely controlled via the internal,
analog interface or an option, digital interface card.
3.2

Remote sense

In order to compensate voltage drops along the load
leads, the device features remote sense inputs on
the front. Here the sensed voltage from the load is
connected with correct polarity. Remote sense can
compensate up to 2V.
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.
20
Date: 09-29-2014
3.3

Overvoltage protection (OVP)

All models feature an overvoltage protection circuit
which is set 110% of the nominal 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 „OV" in the display and also by pin
„ERROR" of the analog interface. The error indica-
tions remains in the display until acknowledged by
button .
After the OV condition is gone, the output can be
switched on again.
3.4

Output restoration after mains blackout

After a mains blackout (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
while „Power ON = restore" will set the output to the
last condition before the blackout.
3.5

Overtemperature (OT)

All models also feature an internal temperature su-
pervision. 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 con-
figured in the setup. During an OT condition a status
text „auto ON" will indicate that the output will be on
after the OT condition is gone. This can be deactivated
by the parameter „OT disappear =
indication remains in the display until it is acknowl-
edged by the button
The condition is indicated by the status text „OT" in the
display and by pin „ERROR" of the analog interface.
The output state restoration can be deactivated in the
setup menu by the parameter
© 2006, Elektro-Automatik GmbH & Co. KG
Irrtümer und Änderungen vorbehalten
EN
„Power ON = OFF",
OFF". The error
.
„OT disappear = OFF".
Instruction Manual
PSI 800 R Series