18
EN
Instruction manual
PS 2000 B Single Series
Date: 18-04-2013
5.4 Overcurrent
The device can react in two different ways to overload
resp. overcurrent:
1. By switching the output off (OCP) or
2. By limitting the output current (CC)
In order to switch the output off, it is required to adjust
the OCP value (see section 4.4) to lower than the current
limitation, because else the current is just limited.
6. Trouble-shooting
6.1 Hardware problems
Problem
: After switching the device on nothing happens
Reason(s)
: Input fuse broken, other defect
Solution
: If the display remains dark, check the input fuse.
It is located inside the input socket on the rear, in a little
„drawer“. It can be checked visually or by means of a mul-
timeter. If the fuse is broken, replace with same type and
value and try again. If the error remains, contact your sup-
plier. In such a case the unit is usually returned for repair.
Problem
: The display only shows „PS 2000“ after switching
the device on
Reason
: An error occured during a firmware update
Solutions
: Switch off device and on again, if this does not
help, try to repeat the firmware update procedure.
6.2 Software problems
Problem
: EasyPS2000 can not detect the device
Reason
: Various
Solution
: Refer to the instruction manual of EasyPS2000
software, section „Trouble-shooting“.
Operating the device
7. Other applications
7.1 Series connection
Several units of preferrably same type, but at least with
identical nominal current, can be connected in series in
order to gain a higher total output voltage.
To do so, the positive DC output of one unit is connected
to the negative DC output of the next unit etc. The pos. DC
output of the last unit will then be the positive output of the
whole series connection and will have the high potential.
Because of safety and insulation reasons it is not
allowed to connect an arbitrary number of units in series.
The DC-- output must not be raised higher than 300V DC
against ground. Thus the maximum allowed series con-
nection voltage is 342V for 42V models and 384V for 84V
models. For a series connection with such high voltage
extra measures for safety have to be taken.
If units with different nominal current are connected in
series, the unit with the lowest nominal current will deter-
mine the maximum current of the system.
If one or several units change into current limitation,
the desired output voltage can not be achieved anymore.
In a series connection, only the positive or negative
DC output of the first unit (the one with the lowest potential)
may be grounded.
7.2 Parallel connection
Several units of preferrably same type, but at least identical
nominal output voltage, can be connected in parallel in
order to gain a higher total output current.
Every unit has to be adjusted seperately (manually or
remotely by a PC). It is recommended to adjust the output
current to the maximum and the output voltage to identical
values on every unit.
If units with different nominal output current are con-
nected in parallel and the unit with the lowest nominal
current changes into current limitation it will drop its output
voltage and will thus not be available anymore as current
source in the parallel system, unless the output current is
sinking again below the limit.
