User manual

8
© 2006, Elektro-Automatik GmbH & Co. KG
Irrtümer und Änderungen vorbehalten
EN
© Elektro-Automatik GmbH & Co. KG
Date: 06-25-2014
Technical description
Sense input
For a compensation of voltage drops on the high power
leads from the power supply to the load, all units are
equipped with remote sense inputs for the main output
voltage V1. By using this function, the sense inputs
must be connected directly to the load terminals via a
2-core cable (if possible, twisted pair), with attention
to the correct polarity (+Sense to +V1 and -Sense to
GND V1) . No current may be drawn through the sense
cables, because otherwise internal components could
be damaged. The maximum compensation of voltage
drops is max. 0,5V per power lead. If no compensation is
wanted, the sense inputs have to be connected directly
to the power output connectors of V1, also with attention
to the correct polarity.
Extern off
To realise a remote on/off function, a special input is
available. To switch off all available outputs, this input
must be connected or switched to GND of V1. If this input
is not connected, all outputs are permanently switched
on. This function makes it possible to use this unit also
in automatic test applications.
Note: On double and triple output models with imple-
mentated „current sharing“ (ASF) option, the external
on/off function is not available.
Temperature
Cooling of the units is realised by convection for an
ambient temperature range of 0°C up to 70°C. If the
ambient temperature exceeds 45°C, the user has to
reduce the load proportionally to the ambient tempera-
ture. The units are overtemperature protected. In case of
an overtemperature, the power outputs are shut down.
After cooling down, the power output will be switch on
again automatically.
Current sharing with ASF (optional)
To gradually increase system power, two or more power
supply units can be connected in parallel. By using the
ASF inputs/outputs, which are also connected in paral-
lel, an effective current sharing is possible. With this, a
redundant power supply system can be built.
4
12
14
8,10
- SENSE
+ SENSE
+ V1
Operation without compensation
Power supply
GND V1
4
12
14
8,10
GND V1
- SENSE
+ SENSE
+ V1
max 0,5V
max 0,5V
Operation with compensation
Power supply
+
-
Load
+
-
Load
ONOFF
Power supply
24
8/10GND V1
Ext. off
4
12
14
8,10
GND V1
- SENSE
+ SENSE
+ V1
4
12
14
8,10
- SENSE
+ SENSE
+ V1
ASF
GND V1
20
20
ASF
4
12
14
8,10
- SENSE
+ SENSE
+ V1
GND V1
20
ASF
+
-
Load