Other Applications; Functions Of Terminal System Bus; 2006, Elektro-Automatik Gmbh & Co. Kg; Series Connection In Master-Slave Mode - Elektro-Automatik PS 8000 2U Bedienungsanleitung

Operating the device

11. Other applications

11.1 Functions of terminal System Bus

The 8pole terminal System Bus is located on the rear and
is used to connect leads for remote sense or to wire multiple
devices for series or parallel connection.
Pin assignment:
1 : Sense +
2 : Sense -
3 : Master output Current
4 : Master output Voltage
5 : Slave input Current
6 : Slave input Voltage
7 : Share Bus
8 : Ground
Attention!
The functions of pins 3-8 are only available with models
from 1000W output power, except the 720V model where
these are available because of safety reasons.

11.1.1 Series connection in Master-Slave mode

For a series connection, it is recommended to use only devices
with identical output current, else the unit with the lowest nominal
output current will define the maximum current of the system.
Figure 9. Series connection in Master-Slave
46
Date: 02-09-2012
One unit is always the master of the next unit, which becomes
slave and master for next one etc. When connecting more than
two units, it is recommended to pick one certain unit as master
and any other as slave. The slave(s) are controlled by the
master via the slave input pins 3 and 4 of the terminal System
Bus. Voltage and current can be controlled simultaneously, but
also seperately.
For an example wiring see figure 9. Voltage and current are
here given by the master. In case only one of both, voltage or
current, is going to be controlled, the other set value should
be set to 100%.
In order to control the whole system remotely, it is sufficient to
control the master via its analogue or digital interface. When
reading actual values, the current monitor value will represent
the overall system current, but the voltage monitor only the
output voltage of the master. In order to get accurate readings,
either the actual voltage is multiplied by the number of unit in
the series connection (only applicable if all are same type) or
all units will have to be read seperately.
Attention!
The master unit must always be the one with the lowest
potential!
Attention!
In case one of the DC outputs shall be grounded it is ad-
vised, for safety reasons, to ground the outputs with the
lowest potential, i.e. the negative (-) output of the master.
© 2006, Elektro-Automatik GmbH & Co. KG
Irrtümer und Änderungen vorbehalten
EN
Instruction Manual
PS 8000 2U Series