CP20.245-R2
CP-Series
24V,
20A,
S
INGLE
P
HASE
I
NPUT
Aug. 2022 / Rev 1.1 DS-CP20.245-R2 EN
All parameters are typ. values specified at 24V, 20A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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27/28
24.8.
P
ARALLEL
U
SE FOR
R
EDUNDANCY
Power supplies can be paralleled for redundancy to gain higher system availability. The unit is already equipped with a
MOSFET as decoupling device on the output to avoid, that a defective unit becomes a load for the other power
supplies and the output voltage can not 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 built-in DC-OK relay contact of the power supply.
Fig. 24-7
Wiring diagram, 1+1 Redundancy for 20A output current
24V, 20A
Load
L
N
PE
Failure
Monitor
I
I
L N PE
+
-
CP20.241-R2-73
Power Supply
DC-OK
DC-
OK
Output 24V 20A
Input
L N PE
+
-
CP20.241-R2-73
Power Supply
DC-OK
DC-
OK
Output 24V 20A
Input
Note:
Use separate mains systems for each power supply whenever it is possible
Fig. 24-8
Wiring diagram, N+1 Redundancy for 40A output current
24V, 40A
Load
L
N
PE
Failure
Monitor
L N PE
+
-
CP20.241-R2-73
Power Supply
DC-OK
DC-
OK
Output 24V 20A
Input
I
I
I
L N PE
+
-
CP20.241-R2-73
Power Supply
DC-OK
DC-
OK
Output 24V 20A
Input
L N PE
+
-
CP20.241-R2-73
Power Supply
DC-OK
DC-
OK
Output 24V 20A
Input
Note:
Use separate mains systems for each power supply whenever it is possible.
Observe the
temperature derating
requirements of Fig. 24-5
and Fig. 24-6 for n+1
redundancy applications.