User Manual

Page 26
PSI 9000 2U Series
www.elektroautomatik.de
[e-mail]
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
1.10 Construction and function
1.10.1 General description
The electronic high performance power supplies of the PSI 9000 2U series are especially suitable for test systems
and industrial controls due to their compact construction in a 19” enclosure with 2 height units (2U). Apart from
basic functions of power supplies, set point curves can be produced in the integrated function generator (sine,
rectangular,triangularandothercurvetypes).ArbitrarycurvescanbesavedtoandloadedfromaUSBashdrive.
For remote control using a PC or PLC the devices are provided as standard with a USB-B slot on the back side
as well as a galvanically isolated analog interface.
Viaoptionalplug-ininterfacemodules,otherdigitalinterfacessuchasProbus,ProNet,ModBus,CANopenand
more can be added. These enable the devices to be connected to standard industrial buses simply by changing or
addingasmallmodule.Theconguration,ifnecessaryatall,issimple.Thusthepowersuppliesmay,forexample,
be operated with other power supplies or even other types of equipment or controlled by a PC or PLC, all using
the digital interfaces.
In addition, the devices offer as standard the possibility for parallel connection in Share bus operation for constant
current sharing plus a genuine master-slave connection with totalizing of the slave units is also provided as standard.
Operating in this way allows up to 10 units to be combined to a single system with a total power of up to 30 kW.
All models are contolled by microprocessors. These enable an exact and fast measurement and display of actual
values.
1.10.2 Block diagram
The block diagram illustrates the main components inside the device and their relationships.
Therearedigital,microprocessorcontrolledcomponents(KE,DR,BE),whichcanbetargetofrmwareupdates.
Power block
1...3
Controller
(DR)
Commu-
nication
(KE)
HMI (BE)
DC
MS
Any
Bus
USBUSB
Ana
log
AC
Share &
Sense
PSI 9000 2U/3U
Block diagram