Data Sheet

CP5.241, CP5.241-C1, CP5.241-S1,
CP5.241-S2, CP5.242
CP-Series
24V, 5A, 120W, SINGLE PHASE INPUT
Sep. 2018 / Rev. 0.4 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.
www.pulspower.com Phone [phone] Germany
PRELIMINARY
23.5. PARALLEL USE FOR REDUNDANCY
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 module
Fig. 23-5 1+1 Redundant configuration with active load share for
5A load current with a dual redundancy module
26/29
L
N
PE
5A
Load
Failure
Monitor
I
YR20.242
Redundancy
Module
Output
Input
1
Input
2
+ +
- -
+
-
optional
Power
Supply
24V,5A
DC-
OK
++
--
LNPE
Output
Input
o
o
Power
Supply
24V,5A
DC-
OK
++
--
LNPE
Output
Input
o
o
I
Note: A YR2.DIODE can also be used instead of a YR20.242
max.
5A
Load
Load
Share
Warning
I I
optional
YR20.246
Redundancy
Module
Output
1
Input
2
Input
++
--
+
-
Load Share
OK
o
o
Redudnadcy
OK
o
o
Failure
Monitor
L
N
PE
Power
Supply
24V,5A
DC-
OK
++
--
LNPE
Output
Input
o
o
Power
Supply
24V,5A
DC-
OK
++
--
LNPE
Output
Input
o
o