Elektro-Automatik PS 8000 2U Serie Bedienungsanleitung Seite 42

Operating the device
10.4 Example applications
Attention! Never connect grounds of the analogue
interface to minus (negative) output of an external
control application (PLC, for example), if that control
application is otherwise connected to the neative po-
wer supply output (ground loop). Load current may
flow over the control leads and damage the device!
Figure 7
Figure 8
Output off
Pin „REM-SB" is always operative and does not depend on the
remote mode. It can thus be used to switch off the output without
extra means. Switching the output off is done by connecting the
pin to ground (DGND) via a low-resistive contact like a switch,
open collector transistor or relay.
Note: a digital output of, for example, a PLC may not be able
to perform the action correctly, because it might not be low-
resistive enough. Always check the technical specifications of
your external control application.
42
Date: 08-15-2011
Remote control of current and voltage
Note: Remote control via analogue interface always requires
to put all set values.
Two potentiometers between VREF and ground, sliders at the
inputs VSEL and CSEL. Power set value PSEL is tied to VREF
and thus set to 100%. The power supply can be controlled as
with the rotary knobs on the front and can either operate as
current or voltage source. In compliance with the max. 5mA
for the VREF output, potentiometers with at least 4.7kOhm
should be used.
Alternatively, external voltage sources can be used to control
the set value input (second example).
Remote control with power (models with power adjustment)
Similiar to the example above, but with adjustable power limit.
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Instruction Manual
PS 8000 2U Series