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mPower 300 Series (Rev G)
5.9.1 Series connection
Series connection of two or multiple units is possible. But for reasons of safety and isolation, some restrictions apply:
•
Both, negative (DC-) and positive (DC+) output poles, are coupled to GND via type X capacitors
•
Any DC minus pole of any unit in the series connection must not be shifted in its potential against
GND higher than what’s stated in the technical specifications!
•
The Share Bus must not be wired and used!
•
Remote sensing must not be used!
•
Series connection should only be wired for units with the same current rating, like for example
MPW 300-01-0080-100 1U with another MPW 300-01-0080-100 1U unit.
Series connection is not supported by the software and hardware of the system. This means, all units must be controlled
separately regarding set values and DC output status, whether it is manual control or digital remote control. In remote
control, an almost synchronous control can be achieved by using the Ethernet ports and sending message as broadcast,
so they address multiple units at once.
The figure below depicts the exemplary series connection of three identical units with 200 V nominal output voltage and
the resulting potential shift of the DC- output pole against GND:
