Datasheet

CPS20.241-D1

C-Series

24V, 20A, DC/DC CONVERTER

22.7. SERIES OPERATION

DC/DC converters 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.

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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 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 the standard mounting orientation (terminals on bottom of the unit).

Unit A

Input

Output

Unit B

Load

Earth

(see notes)

Input

Output

Pay attention that EMI and inrush current will increase when using multiple DC/DC converters.

22.8. BACK-FEEDING LOADS

Loads such as decelerating motors and inductors can feed voltage back to the DC/DC converter. This feature is also

called return voltage immunity or resistance against Back- E.M.F. (E

lectro Magnetic Force).

This DC/DC converter is resistant and does not show malfunctioning when a load feeds back voltage to the DC/DC

converter. It does not matter whether the DC/DC converter is on or off.

The maximum allowed feed-back-voltage is 35Vdc. The absorbing energy can be calculated according to the built-in

large sized output capacitor which is specified in chapter 6.

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.