42
EN
Instruction Manual
PS 8000 DT Series
Date: 03-05-2016
Operating the device
11. Other applications
11.1 Functions of terminal System Bus
The 8-pole 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 1000 W output power.
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 8. Series connection in Master-Slave
One unit is always the master of the next unit, which becomes
slave, and so on. When connecting more than two units, it
is recommended to consider 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
separately.
For an example wiring see figure 8 below. 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 separately.
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.
