User Manual
Page 31
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
ea1974@elektroautomatik.de
ELR 9000 Series
Examples of the type 1 terminal:
• 90° up or down
• space saving in depth
• no bending radius
• horizontal lead
• space saving in height
• large bending radius
2.3.6 Grounding of the DC input
Individually operated devices can always be grounded from the DC minus pole, i.e. can be directly connected to
PE. The DC plus pole, however, if it is to be grounded, may only be so for input voltages up to 300V.
For this reason, for all models which can support an input voltage higher than 300V grounding of the DC plus pole
is not allowed.
• Do not ground the DC plus pole on any model with >300V nominal voltage
• If grounding one of the input poles ensure that no output poles of the source (e.g. power sup-
ply) are grounded. This could lead to a short-circuit!
2.3.7 Connection of remote sense
In order to compensate the voltage loss along a DC cable up to a certain degree, the device provides the possibility
to connect the remote sense input “Sense” to the source. The device recognizes the remote sense mode automati-
cally and regulates the input voltage (only in CV operation) at the source rather than at its own DC input. In the
technical specications (see section „1.9.3. Specic technical data“) the level of maximum possible compensation
is given. If that is insufcient, the cable cross section must be increased.
• The cross section of the sense cables is noncritical. However, it should be increased with
increasing cable length. Recommendation for a cable up to 5m is 0.5mm²
• Sense 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
• The sense cables must be connected + to + and - to - at the source, otherwise both systems
may be damaged
• In master-slave operation, the remote sense should be connected to the master unit only
Figure 8 - Example for remote sense wiring