User Manual

Table Of Contents
Page 75
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
ea1974@elektroautomatik.de
PSI 9000 3U Series
3.9.2 Series connection
Series connection of two or multiple devices is basically possible. But for reasons of safety and isolation, some
restrictions apply:
• Both, negative (DC-) and positive (DC+) output poles, are connected to PE via type X capacitors
• None DC minus pole of any in the series connection must have a potential of >400 V against
ground (PE)!
• The Share Bus must not be wired and used!
• 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, like for example PS/PSI 9080-170 3U with PSI 9080-170 3U or PS 9080-170 3U
Series connection in Master-Slave mode is not supported. It means, all units have to 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 any available Ethernet interface module and sending message as
broadcast, so they address multiple units at once.
Thegurebelowdepictstheexemplaryseriesconnectionofthreeidenticaldeviceswith200Vnominaloutput
voltage and the maximum potential shift of any DC- output against PE: