Other Applications; Series Connection; Parallel Connection - Elektro-Automatik EA-PSI 800 R Bedienungsanleitung

Handling the device
Set values 1
The example shows how the set values can be
controlled using the reference voltage (VREF) and
potentiometers on the set value inputs.
The potentiometer should be 10kOhm each or higher.
Set values 2
The example shows how to control voltage and cur-
rent by means of external voltage sources.
Attention! Never connect voltages >12V to these
inputs!
Set values >10V or >5V, depending on the voltage
range selection in the setup, are clipped to 100%
nominal value.
Instruction Manual
PSI 800 R Series
6.

Other applications

6.1

Series connection

It is possible to connect multiple units of the same
type to a series connection if these rules are followed:
• No master-slave operation
• The grounds of the analog interfaces MUST NOT
be connected to each other. This also applies for
any other signal on the analog interfaces. If remote
control is required, it can be done using galvanic
isolation amplifiers and by controlling all units in
parallel.
• Any load current leading conductor must be dimen-
sioned for the maximum output current of the unit
with the highest nominal output current.
• No negative DC output pole of any device may have
a potential >300V against earth (PE).
6.2

Parallel connection

Multiple units with identical output voltage and ide-
ally identical output current can be used in parallel
connection (master-slave or other) without any re-
strictions. For example, the master is equipped with a
digital interface card and the units are wired via their
analog interfaces. Here the monitor outputs (or one
of them) of the master are connected to the set value
inputs of the first slave etc.
Alternatively, all units can be equipped with a digital
interface card in order to supervise and control any
units separately. Controlling the units with identical
set values is possible by using broadcast messages.
An example of master-slave wiring and current con-
trol. The voltage is here tied to 100%, so the slaves
can follow:
Date: 09-29-2014
EN
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