6EP1321-1SH03 データシートの表示（PDF） - Siemens AG

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6EP1321-1SH03

Power supply LOGO!Power

Siemens AG 

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5.2 Parallel connection for redundancy

5.2

Parallel connection for redundancy

The parallel switching of several LOGO!Power power supplies for redundancy is required

when the demands for reliability of the supply are particularly high.

If a component in the redundant supply fails, the power supply for the loads must be fully

accommodated by the remaining component. It is therefore important when dimensioning the

system to make sure that n+1 redundant switched power supplies can handle the total power

requirement of the remaining n power supplies.

To prevent loading of the remaining power supplies in the event of a secondary-side error

when one power supply fails, the respective "+" terminals of the power supplies must be

decoupled via diodes.

NOTICE

For a high reliability of the supply, it is recommended that the redundant switched power

supplies are fused separately on the line-side and, if possible, be connected to different

power supply networks.

Figure 5-2 Parallel connection for redundancy

LOGO!Power

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Operating Instructions, 02.2011, C98130-A7560-A999-1-7619

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