CD5.121 Datasheet, PDF (21/22 Pages) PULS GmbH – DC/DC Converter 12V, 8A

CD-Series
CD5.121
DC/DC Converter 12V, 8A
21.9. DAISY CHAINING OF OUTPUTS
Daisy chaining (jumping from one DC/DC-converter output to the next) is allowed as long as the average output
current through one terminal pin does not exceed 25A. If the current is higher, use a separate distribution terminal
block.
Fig. 21-4 Daisy chaining of outputs
Fig. 21-5 Using distribution terminals
max 25A!
Output
++- -
DC/DC
Converter
Output
++- -
DC/DC
Converter
Input
Input
+-
Load
Output
++- -
Output
++- -
DC/DC
DC/DC
Converter Converter
+-
Load
Input
Input
Distribution
Terminals
21.10.SERIES OPERATION
DC/DC converters of the exact same type can be connected in series for higher
Unit A
Input
+
output voltages. It is possible to connect as many units in series as needed,
providing the sum of the output voltage does not exceed 150Vdc. Voltages with
a potential above 60Vdc are not SELV any more and can be dangerous. Such
-
Output
voltages must be installed with a protection against touching. Earthing of the
output is required when the sum of the output voltage is above 60Vdc. Avoid
Unit B
Input
+
return voltage (e.g. from a decelerating motor or battery) which is applied to the
output terminals. Keep an installation clearance of 15mm (left / right) between
two DC/DC-converters and avoid installing the DC/DC-converters on top of each
other. Do not use DC/DC-converters in series in mounting orientations other than
-
Output
the standard mounting orientation (input terminals on the bottom and output terminals on top of the unit).
Load
+
-
21.11.USE IN A TIGHTLY SEALED ENCLOSURE
When the DC/DC-converter is installed in a tightly sealed enclosure, the temperature inside the enclosure will be
higher than outside. In such situations, the inside temperature defines the ambient temperature for the DC/DC-
converter.
The following measurement results can be used as a reference to estimate the temperature rise inside the enclosure.
The DC/DC-converter is placed in the middle of the box, no other heat producing items are inside the box
Enclosure:
Load:
Input:
Temperature inside enclosure:
Temperature outside enclosure:
Temperature rise:
Rittal Typ IP66 Box PK 9516 100, plastic, 110x180x165mm
12V, 6.4A; (=80%) load is placed outside the box
24Vdc
48.0°C (in the middle of the right side of the DC/DC converter with a distance of 2cm)
22.6°C
25.4K
Mar. 2016 / Rev. 1.5 DS-CD5.121-EN
All parameters are specified at 12V, 8A, 24Vdc input voltage, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
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