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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
PSB 9000 3U Slave Series
1.9
Construction and function
1.9.1 General description
The power supplies of the PSB 9000 3U Slave series are so-called bidirectional devices, incorporating the func-
tion of a laboratory 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 efficiency of up to 95% and feeds it back into the local mains.
By default, the devices have an USB port on the rear side which serves various purposes, such as servicing
(firmware updates), monitoring during master-slave operation or even remote control when the unit is being used
in stand-alone operation.
The additional USB port on the front side is used for quick access to all the DC terminal related parameters and
settings. The configuration via this port can be done with the included software
EPS
Power Control
(on USB stick)
or via any custom made control application.
The devices offer as standard the possibility for parallel connection in Share bus operation to achieve a constant
current sharing, plus a genuine master-slave connection with totalling of the slave units’ values. This kind of opera-
tion allows for up to 16 units to be combined to a single system with a total power of up to 240 kW.
All models are controlled by three microprocessors. These enable an exact and fast 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 firmware updates.
Controller
(DR)
Commu-
nication
(KE)
HMI
MS
USB
USB
Share &
Sense
PSB 9000 Slave
Block diagram
=
≈
=
≈
Power block
1...3
AC
DC
