CP5.241 Datasheet, PDF (23/26 Pages) PULS GmbH – 24V, 5A, 120W, SINGLE PHASE INPUT

PRELIMINARY
CP-Series
CP5.241, CP5.241-C1,
CP5.241-S1, CP5.241-S2
24V, 5A, 120W, SINGLE PHASE INPUT
24.5. PARALLEL USE FOR REDUNDANCY
Power supplies can be paralleled for redundancy to gain higher system availability. Redundant systems require a
certain amount of extra power to support the load in case one power supply unit fails. The simplest way is to put two
power supplies in parallel. This is called a 1+1 redundancy. In case one power supply unit fails, the other one is
automatically able to support the load current without any interruption. Redundant systems for a higher power
demand are usually built in a N+1 method. E.g. five power supplies, each rated for 5A are paralleled to build a 20A
redundant system. For N+1 redundancy the same restrictions apply as for increasing the output power, see also
chapter 24.4.
Please note: Always use a redundancy module to decouple power supplies from each other. This prevents that the
defective unit becomes a load for the other power supplies and the output voltage cannot be maintained any more.
Recommendations for building redundant power systems:
a) Use separate input fuses for each power supply.
b) Monitor the individual power supply units. Therefore, use the DC-OK relay contact of the CP5 power supply.
c) It is desirable to set the output voltages of all units to the same value (± 100mV) or leave it at the factory setting.
Fig. 24-1 1+1 Redundant configuration for 5A load current with a
dual redundancy module
Fig. 24-2 1+1 Redundant configuration with active load share for
5A load current with a dual redundancy module
++- -
Output
24V,5A
DC- o
OK _o
Power
Supply
Input
L N PE
+- +-
Input Input
12
YR20.242
Redundancy
Module
++- -
Output
24V,5A
DC- o
OK _o
Power
Supply
Output
-+
Input
L N PE
Failure
Monitor
5A
Load
++- -
Output
24V,5A
DC- o
OK _o
Power
Supply
Input
L N PE
++- -
Output
24V,5A
DC- o
OK _o
Power
Supply
Input
L N PE
- - ++
1
2
Input Input
Load Share o
OK _o
Redudnadcy o
OK _o
YR20.246
Redundancy
Module
Output
-+
Load
Share
Warning
Failure
Monitor
max.
5A
Load
I
I
L
N
PE
Note: A YR2.DIODE can also be used instead of a YR20.242
I
I
L
N
PE
Fig. 24-3 N+1 Redundant configuration for 15A load current with multiple power supplies and redundancy modules
++- -
Output
24V,5A
DC- o
OK _o
Power
Supply
Input
L N PE
+- +-
Input Input
12
YR20.242
Redundancy
Module
++- -
Output
24V,5A
DC- o
OK _o
Power
Supply
Output
-+
Input
L N PE
++- -
Output
24V,5A
DC- o
OK _o
Power
Supply
Input
L N PE
+- +-
Input Input
12
YR20.242
Redundancy
Module
++- -
Output
24V,5A
DC- o
OK _o
Power
Supply
Output
-+
Input
L N PE
I
I
I
I
L
N
PE
Note: A YR2.DIODE can also be used instead of a YR20.242
Aug. 2017 / Rev. 0.1 DS-CP5.241-EN
All parameters are typical values specified at 24V, 5A output, 230Vac input, 25°C ambient and
after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
Failure
Monitor
15A
Load
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