Elektro-Automatik PSI 8000 T Betriebsanleitung Seite 60

Using the power supply
Emulated Master-Slave operation
True Master-Slave operation is not possible, because the AI
does not provide set values outputs. But the actual value output
CMON can be used to control the set values input CSEL of one
or multiple different power supplies of the same type. Any open
set value input can be tied to VREF. In the example below, the
current input of the slave is set to 100% by VREF and the master
only controls the slave voltage with VMON. In a parallel connec-
tion, the load current will distribute amongst the power supplies
almost uniformly.
Also see section „11.1 Parallel connection".
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.
Exception: if local mode was activated by the user (see section
6.9), then the control signals on the analog interface are com-
pletely ignored.
The user has to ensure that the level of this input is held constant.
Note
A digital output of, for example, a PLC may not be able to per-
form the action correctly, because it might not be low-resistive
enough. Therefore: always check the technical specifications
of your external control application.
60
Date: 02-05-2016
Remote control of current and voltage
Two potentiometers between VREF and ground, sliders at the
inputs VSEL and CSEL. The power supply can be controlled as
with the rotary encoders on the front and can either operate as
current or voltage source. In compliance with the max. 3 mA for
the VREF output, potentiometers with at least 10 kOhm have to
be used.
The power set value is here, for models with power regulation
feature, tied to VREF and thus 100%.
Remote control with power
Similar to the example above, but with adjustable power limit.
Power adjustment only works at models from 1000 W.
© 2006, Elektro-Automatik GmbH & Co. KG
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Operating Guide
PSI 8000 T Series