CP20.241-R1, CP20.241-R2,

CP20.241-R3

CP-Series

June 2017 / Rev. 0.1 DS-CP20.241-R2-EN

All parameters are typical values specified at 20A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.

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P R E L I M I N A R Y

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.

Unit A

Input

Output

Unit B

-

+

-

+

Load

+

-

Input

Output

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 (input terminals on bottom of the unit).

Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.

Power supplies can be paralleled to increase the output power. For

redundancy applications one extra power supply is always needed for

sufficient output current in case one unit fails.

The unit is permanently set to “parallel use” mode in order to achieve

load sharing between power supplies connected in parallel. The “Parallel

use” mode regulates the output voltage in such a manner that the voltage

at no load is approx. 4% higher than at nominal load. See also chapter 6.

It also might be necessary to cycle the input power (turn-off for at least

short circuits and the required output current is higher than the current of one unit.

Unit A

Unit B

-

+

-

+

Load

+

-

Input

Output

Input

Output

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 parallel in mounting orientations other than the standard mounting orientation (input

terminals on bottom of the unit) or in any other condition where a derating of the output current is required (e.g.

altitude).

Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.

Do not load paralleled power supplies with higher currents as shown in the following diagrams:

Fig. 25-5 Output current vs. ambient temp. for

two paralleled units

Fig. 25-6 Output current vs. ambient temp.

for three paralleled units

Allowed output current for two paralleled units

Allowed output current for three paralleled units

48A

0

30

40

50

60

70°C

8A

16A

24A

32A

40A

B

72A

A

Ambient Temperature

A... continuous

B... short term (max. 5s)

36.6

28A

0

30

40

50

60

70°C

12A

24A

36A

48A

60A

B

A

42A

A... continuous

B... short term (max. 5s)

36.6

Ambient Temperature