Datasheet

CPS20.241-D1
C-Series
24V, 20A, DC/DC CONVERTER
22.9. CHARGING OF BATTERIES
The DC/DC converter can be used to charge lead-acid or maintenance free batteries. (Two 12V batteries in series)
Instructions for charging batteries:
a) Set output voltage (measured at no load and at the battery end of the cable) very precisely to the end-of-charge
voltage.
End-of-charge voltage 27.8V 27.5V 27.15V 26.8V
Battery temperature 10°C 20°C 30°C 40°C
b) Use a 30A or 32A circuit breaker (or blocking diode) between the DC/DC converter and the battery.
c) Ensure that the output current of the DC/DC converter is below the allowed charging current of the battery.
d) Use only matched batteries when putting 12V types in series.
e) The return current to the DC/DC converter (battery discharge current) is typ. 23mA when the DC/DC converter is
switched off (except in case a blocking diode is utilized).
22.10. 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: Rittal Typ IP66 Box PK 9522 100, plastic, 254x180x165mm
Load: 24V, 16A; (=80%) load is placed outside the box
Input: 300Vdc
Temperature inside enclosure: 51.5°C (in the middle of the right side of the DC/DC converter with a distance of 2cm)
Temperature outside enclosure: 25.0°C
Temperature rise: 26.5K
Oct. 2013 / Rev. 1.2 DS-CPS20.241-D1-EN
All parameters are specified at 24V, 20A, 300Vdc, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
24/25