User manual

Page 24
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 3000 B Series
2.3.6 Connection of remote sensing
• Remote sensing is only effective during constant voltage operation (CV) and for other regulation
modes the sense input should be disconnected, if possible, because connecting it generally
increases the oscillation tendency.
• The cross section of the sensing cables is noncritical. Recommendation for cables up to 5 m:
use at least 0.5 mm²
• Sensing cables should be twisted and laid close to the DC cables to damp oscillation. If neces-
sary, an additional capacitor can be installed at the source to eliminate oscillation
• Sensingcablesmustbeconnected+to+and-to-atthesource,otherwisethesenseinput
of the electronic load can be damaged. For an example see Figure 6 below.
Figure 6 - Example for remote sensing wiring
The connector Sense is a clamp terminal. It means for the remote sensing cables:
• Insert cables: crimp sleeves onto the cable ends and simply push them into the bigger square hole
• Removecables:useasmallatscrewdriverandpushintothesmallersquareholenexttothebiggeroneto
loosen the cable clamp, then remove cable end
2.3.7 Connecting the analog interface
Ananaloginterfaceinformofapluggableinterfacecardisoptionallyavailable,canberetrottedbytheuseron
location into the rear side located slot and offers a 15 pole D-Sub connector. To connect it to a control hardware (PC,
PLC, electronic circuit), a standard D-Sub plug is required (not included with the interface). It is generally advisable
to switch the device completely off before connecting or disconnecting this connector, but at least the DC input.
The analog interface is galvanically isolated from the device internally. Therefore do not con-
nect any ground of the analog interface (AGND) to the DC minus input as this will cancel the
galvanic isolation.
2.3.8 Connecting the USB port
AnUSBinterfaceinformofapluggableinterfacecardisoptionallyavailableandcanberetrottedbytheuseron
location into the rear side located slot. Depending on the type of the card it only offers the USB port or also has
an extra port (LAN or analog).
In order to remotely control the device via this port, connect the device with a PC using the included USB cable
and switch the device on.
2.3.8.1 Driver installation (Windows)
On the initial connection with a PC the operating system will identify the device as new hardware and will try to
install a driver. The required driver is for a Communications Device Class (CDC) device and is usually integrated in
current operating systems such as Windows 7 or 10. But it is strongly recommended to use and install the included
driver installer (on USB stick) to gain maximum compatibility of the device to our softwares.
2.3.8.2 Driver installation (Linux, MacOS)
We cannot provide drivers or installation instructions for these operating systems. Whether a suitable driver is
available is best found out by searching the Internet. With newer versions of Linux or MacOS, a generic CDC
driver should be “on board”.