User Manual

Page 18
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSB 9000 2.5 kW Series
1.9 Construction and function
1.9.1 General description
The power supplies of the PSB 9000 series are so-called bidirectional devices, incorporating the function of a lab-
oratory power supply (source) and an electronic load (sink) into one unit. They allow for easy setup of applications
according to the source-sink principle with a minimum of required hardware and cabling.
The sink feature is furthermore included with an energy recovery function which inverts the consumed DC energy
withane󰀩ciencyofupto95%andfeedsitbackintothelocalmains.
Apart from basic functions of power supplies, set point curves can be generated by the integrated function gen-
erator (sine, rectangular, triangular and other curve types). Arbitrary generator curves (99 points) can be saved to
andloadedfromanUSBstick.Someofthefunctionseveno󰀨ertodynamicallyswitchbetweensourceandsink
operation mode by setting up positive (for the source) or negative (for the sink) current set values.
For remote control the devices are provided as standard with an USB slot on the back side as well as a galvanically
isolated analog interface.
Viaoptionalplug-ininterfacemodules,otherdigitalinterfacessuchasforEthernet,RS232,Probus,ProNet,
ModBus TCP, CAN, CANopen or EtherCAT 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.
Inaddition,thedeviceso󰀨erasstandardthepossibilityforparallelconnectioninso-calledSharebusoperation
for constant current sharing, plus a true master-slave connection with totaling of all actual values is also provided
as standard. Operating in this way allows for up to 16 units to be combined to a single system with a total power
of up to 40 kW.
All models are controlled by microprocessors for fast and exact measurement and display of actual values.
1.9.2 Block diagram
The block diagram illustrates the main components inside the device and their relationships.
Therearedigital,microprocessorcontrolledcomponents(KE,DR,HMI),whichcanbetargetofrmwareupdates.
Controller
(DR)
Commu-
nication
(KE)
HMI
MS
Anybus /
GPIB (opt.)
USBUSB
Ana
log
Share &
Sense
PSB 9000
Block diagram
=
≈
=
≈
Bidirectional
power stage
AC
DC