Beckhoff PS1061-2410-0000, Руководство пользователя

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Application notes
PS1061-2410-0000 29 Version: 1.0
4.3 Parallel use to increase power
The power supply must not be connected in parallel to increase the output power.
4.4 Parallel use for 1+1 redundancy
It is possible to connect power supplies in parallel for redundancy operation in order to achieve better system
availability. Redundant systems provide a certain amount of additional power to operate the load when a
power supply unit fails. The simplest method is to connect two power supplies in parallel. This is called 1+1
redundancy. If one power supply fails, the other can automatically supply the load current without
interruption.
The 1+1 redundancy allows ambient temperatures up to +70 °C.
Notes on parallel use for 1+1 redundancy
• Be sure to use a redundancy module in order to decouple devices from one another. This pre-
vents the defective device from becoming a load for the other device and the output voltage no
longer being maintainable.
• Note that leakage current, EMI, input inrush current and harmonics increase when using multiple
devices.
Recommendations for the construction of redundant power supply systems:
• Power supplies that contain a DC-OK signal contact are best suited for the construction of redundant
power supply systems.
Use this DC-OK signal contact to monitor the individual power supply units.
• Use separate input fuses for each power supply.
• Use separate grids for each power supply whenever possible.
• It is recommended to set the output voltages of all devices to the same value (± 100 mV) or to leave
them at the factory setting.
Wiring example:
Fig. 14: Wiring for 1+1 redundancy with a PS9401-2420-0000 redundancy module