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PS1061-2420-0000 | Power supply 24 V DC, 20 A, 1 phase, AC 200-240 V · 0 次阅读

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.

Parallel use for 1+1 redundancy 1:

Notes on parallel use for 1+1 redundancy

  • Be sure to use a redundancy module in order to decouple devices from one another. This prevents 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 supplies.
  • 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:

Parallel use for 1+1 redundancy 2:Fig.14: Wiring for 1+1 redundancy with a PS9401-2440-0000 redundancy module