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]
EL 9000 B HP Series
1.9 Construction and function
1.9.1 General description
The HP in the series name EL 9000 B HP stands for “high power”and points to an improved characteristics regard-
ingthethermalderatingwhichistypicalforconventionalloads.Forthisseries,theratedsteadypowerisdened
upto30°Cambienttemperature,comparedtotheEL9000Bserieswhereitisdenedupto25°C(.
Apart from basic functions of electronic loads, set point curves can be produced in the integrated function generator
(sine, rectangular, triangular and other curve types). Arbitrary curves can even be stored on and uploaded from
an USB stick.
For remote control using a PC or PLC the devices are provided as standard with an 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TCP,CANopen,
CAN 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atallnecessary,issimple.Thustheloadsmay,forex-
ample, be operated with other loads or even other types of equipment or controlled by a PC or PLC, all using the
digital interfaces.
In addition the devices offer the possibility to connect to compatible power supplies via a Shared Bus, in order to
create a so-called two-quadrants system. This operation mode uses the source-sink principle for testing devices,
components and other parts in many industrial areas.
A genuine master-slave connection with totalling 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 24 kW.
All models are controlled by 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,BE),whichcanbetargetofrmwareupdates.
Controller
(DR)
Commu-
nication
(KE)
HMI
DC
Any
Bus
USBUSB
Ana
log
Share &
Sense
EL 9000 B
Block diagram
AC
=
≈
MS
Power block