User manual

Page 15
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
ELR/ELM 5000 Series
1.9 Construction and function
1.9.1 General description
The electronic multi-channel DC load of series ELR/ELM 5000 is a combination of a 19” 6U rack (ELR 5000) and
up to 10 units of electronic DC load modules, which can be installed in the rack. The system can be operated
standalone or mounted in suitable cabinets.
The load modules are removable, retrottable and can be installed in an arbitrary number (1-10) and position by
the end user. A mixed setup of 80 V and 200 V versions is also possible. The modules run separate from each
other and form a multi-channel DC load for industrial applications, for instance to test multiple E.U.T at once.
Beyond standard features of electronic loads, set point based runs can be generated by the integrated sequence
generator. It offers 100 points for arbitrary congurations of voltage, current, power and time each. The resulting
sequence can be stored to or loaded from an USB stick. This is enabled by an USB port on the front side which
is standard with these load modules.
For remote control the load modules are provided as standard with an Ethernet port on the front side as well. Net-
work conguration is simple and done on the touchscreen control panel. With this port the loads may, for example,
be operated together with other load types or even different kind of equipment, all controlled by a PC, PLC or mini
PCs, like a Raspberry Pi or PXI.
Remote control and/or monitoring is supported by the devices via the protocols ModBus RTU and the prolic SCPI.
The generated DC energy is converted through a high efciency internal inverter and fed back as AC energy into
the 230 V (EU model) resp. 208 V (US model) mains.
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 (DR & BE), which can be target of rmware updates.
Controller
(DR)
HMI(BE)
AC
DC
USB
Ethernet
Sense
ELR/ELM5000
=
≈
Powerblock
Blockdiagram