Elektro-Automatik PS 8000 2U Serie Bedienungsanleitung Seite 43

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 3-6 are only available with
models from 1000W output power and not for the 720V
model.
11.1.1 Series connection in Master-Slave mode
Series connection not allowed for 720V model!
Note: only available with devices from 1kW nominal power!
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
Instruction Manual
PS 8000 2U Series
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 system master must always be the unit with
the lowest potential!
Attention! In case one of the output poles is going to be
grounded, it is recommended for safety reasons to ground
the pole with the lowest potential, in this case minus output
(-) of the master.
Date: 08-15-2011
EN
43