Datasheet

CPS20.121
C-Series
12V, 30A, SINGLE PHASE INPUT
22.7. SERIES OPERATION
Unit A
AC
DC
Unit B
AC
DC
-
+
-
+
Load
+
-
Earth
(see notes)
Power supplies of the same type can be connected in series for higher
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 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 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 power supplies and avoid installing the power
supplies on top of each other. Do not use power supplies in series in mounting orientations other than the standard
mounting orientation (terminals on bottom of the unit).
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.
22.8. INDUCTIVE AND CAPACITIVE LOADS
The unit is designed to supply any kind of loads, including capacitive and inductive loads. If extreme large capacitors,
such as EDLCs (electric double layer capacitors or “UltraCaps”) with a capacitance > 1.25F are connected to the output,
the unit might charge the capacitor in the Hiccup
PLUS
mode (see chapter 6).
22.9. CHARGING OF BATTERIES
The power supply can be used to charge 12V lead-acid or maintenance free batteries.
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 13.9V 13.75V 13.6V 13.45V
Battery temperature 10°C 20°C 30°C 40°C
b) Use a 40A or 50A circuit breaker (or blocking diode) between the power supply and the battery.
c) Ensure that the output current of the power supply is below the allowed charging current of the battery.
d) The return current to the power supply (battery discharge current) is typ. 42mA when the power supply is
switched off (except in case a blocking diode is utilized).
Apr. 2014 / Rev. 1.4 DS-CPS20.121-EN
All parameters are specified at 12V, 30A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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