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EPS Stromversorgung GmbH
Alter Postweg 101 • 86159 Augsburg
Germany
Fon: +49 821 / 570451-0
Fax: +49 821 / 570451-25
www.eps-germany.de
PSI 10000 4U Serie
3.11.2
Series connection
Series connection of two or multiple devices is basically possible. But for reasons of safety and isolation, following
restrictions apply:
•
Both, negative (DC-) and positive (DC+) output poles, are connected to PE via type X capacitors
•
None DC minus pole of any unit in the series connection must have a potential against ground
(PE) higher than specified in the technical data! The maximum allowed potential shift varies
from model to model and is different for DC plus and DC minus
•
Remote sensing must not be used!
•
Series connection is only allowed with devices of the same kind and model, i.e. power supply
with power supply, and ideally same ratings, but especially the current rating should match
Series connection in Master-Slave mode isn’t supported. It means, all units have to controlled separately regarding
set values and DC output status, whether it’s manual control or remote control (digital or analog).
Due to the max. allowed potential shift on the DC output certain models are not allowed for series connection at
all, like the 1000 V model, because the DC plus there is only isolated up to 1000 V. On the contrary, two 500 V
models are eligible for series connection.
Analog interfaces on the units in serial connection can be connected in parallel, because they are galvanically
isolated. It’s also allowed to ground the GND pins of the analog interfaces connected in parallel, which may happen
automatically, when connecting them to a controlling device such as a PC, where grounds are directly tied to PE.
3.11.3
Operation as battery charger
A power supply can be used as a battery charger, but with some restrictions, because it misses a battery super
-
vision and a physical separation from the battery in form of a relay or contactor, which is featured with some real
battery chargers as a protection.
Following has to be considered:
•
No false polarity protection inside! Connecting a battery with false polarity will damage the power supply severely,
even if it’s not powered.