Cut Sheet

CP5.121
CP
-Series
12V, 10A, 120W, SINGLE PHASE INPUT
Aug 2021 / Rev. 1.2 DS-CP5.121-EN All values are typical figures specified at 230Vac, 50Hz input voltage, 12V 10A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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23.5. PARALLEL USE FOR REDUNDANCY
1+1 Redundancy:
Devices 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 device fails. The simplest way is to put two devices in parallel.
This is called a 1+1 redundancy. In case one device fails, the other one is automatically able to support the load current
without any interruption. It is essential to use a redundancy module to decouple devices from each other. This
prevents that the defective unit becomes a load for the other device and the output voltage cannot be maintained any
more.
1+1 redundancy allows ambient temperatures up to +70°C.
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.
Recommendations for building redundant power systems:
- Use separate input fuses for each device.
- Use separate mains systems for each device whenever it is possible.
- Monitor the individual devices. Therefore, use the DC-OK signal of the device.
- It is desirable to set the output voltages of all devices to the same value (± 100mV) or leave it at the factory setting.
N+1 Redundancy:
Redundant systems for a higher power demand are usually built in a N+1 method. E.g. four devices, each rated for 10A
are paralleled to build a 30A redundant system.
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.
Keep an installation clearance of 15mm (left / right) between two devices and avoid installing the devices on top of
each other.
Do not use devices in parallel in mounting orientations other than the standard mounting orientation or in any other
condition, where a reduction of the output current is required.
For N+1 redundancy the ambient temperature is not allowed to exceed +40°C.
Wiring examples:
Fig. 23-4 1+1 Redundant configuration for 10A
load current with a dual redundancy module
Fig. 23-5 N+1 Redundant configuration for 30A load current with multiple power
supplies and redundancy modules
L
N
PE
10A
Load
Failure
Monitor
I
YR20.242
Redundancy
Module
Output
Input
1
Input
2
+ +
- -
+
-
optional
Power
Supply
12V, 10A
DC-
OK
+ +
- -
L N PE
Output
Input
o
o
Power
Supply
12V, 10A
DC-
OK
+ +
- -
L N PE
Output
Input
o
o
I
L
N
PE
30A
Load
Failure
Monitor
I
YR20.242
Redundancy
Module
Output
Input
1
Input
2
+ +
- -
+
-
optional
Power
Supply
12V, 10A
DC-
OK
+ +
- -
L N PE
Output
Input
o
o
Power
Supply
12V, 10A
DC-
OK
+ +
- -
L N PE
Output
Input
o
o
I
YR20.242
Redundancy
Module
Output
Input
1
Input
2
+ +
- -
+
-
Power
Supply
12V, 10A
DC-
OK
+ +
- -
L N PE
Output
Input
o
o
Power
Supply
12V, 10A
DC-
OK
+ +
- -
L N PE
Output
Input
o
o
I I