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CP-Series
23.5. P
U
ARALLEL
SE FOR
Please note that there are variants with built-in redundancy are available in the CP5 series. Check CP5.241-Rx units.
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 5A are paralleled to
build a 15A 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 5A load current with a dual redundancy
- -
+ +
+
Output
Input
24V,5A
1
o
DC -
OK
o
YR 20.242
R edundancy
Module
P ower
S upply
Output
Input
L N P E
I
L
N
P E
Note:
A YR2.DIODE can also be used instead of a YR20.242
Jul. 2022 / Rev. 1.2 DS-CP5.241-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
R
EDUNDANCY
module
F ailure
Monitor
-
-
- -
+
+ +
Output
Input
2
24V,5A
o
DC -
OK
o
P ower
S upply
Input
-
+
L N P E
5A
Load
I
www.pulspower.com Phone +49 89 9278 0 Germany
CP5.241, CP5.241-C1, CP5.241-S1,
CP5.241-S2, CP5.242
24V, 5A, 120W, S
Fig. 23-5 1+1 Redundant configuration with active load share for 5A load current
with a dual redundancy module
- -
+ +
+ +
Output
24V,5A
o
DC -
OK
o
P ower
P ower
S upply
S upply
Input
L N P E
L N P E
I
I
L
N
P E
P
INGLE
HASE
- -
-
-
+
+
Output
1
2
S hare
Input
Input
24V,5A
Warning
o
Load S hare
OK
o
o
DC -
OK
o
o
R edudnadcy
OK
o
F ailure
YR 20.246
Monitor
R edundancy
Module
Output
Input
-
+
I
NPUT
Load
max.
5A
Load
27/30
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