User manual

Page 23
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
For the connection of DC power cables we recommend to either use cable end-sleeves or spade lugs.
Required for the DC terminal:
• Cable end-sleeves (insulated): 0,5 mm² ... 4 mm², max. length of the end-sleeve 8 mm
• Spade lugs (insulated): 4mm
When wiring the DC input(s) and the network port(s) at the same time it is imperative to keep
distance between both lines! DC cables and network cables must not be tied together!
Figure 11 - Not allowed wiring Figure 12 - Allowed wiring (example)
The wiring example in Figure 12 is only one possible solution. It would even better to let the LAN cable lead away
to the top, so it does not obstruct the knob and the touch display remains fully accessible.
A plastic cover for contact protection on the DC terminal is included. It must always be installed.
2.3.7 Connection of remote sensing
• 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 should be installed at the source to eliminate oscillation
• Sensing cables must be connected Sense+ to + and Sense- to - at the source, otherwise the
sense input of the electronic load can be damaged. For an example see Figure 10.
The load modules can be operated using remote sense or not. Remote sense can help to achieve a more accurate
voltage regulation and thus only makes sense when being used in constant voltage (CV) operation.
If remote sense is not used, the sense connectors on the DC terminal on the front must still be wired between DC+
and Sense+, as well as DC- and Sense-. Only then the device can correctly measure and regulate the input voltage.
For both situations see the wiring examples in Figure 9 and Figure 10.