Using Multiple System Power Supplies

There are three reasons to use more than one power supply for a system application:

To provide load sharing if more than 100 percent of the output of a single supply is required
To supply separate power supplies for redundant equipment
To provide a backup for one or more power supplies in a system

Do not use different product types in multiple system power supply applications. Use the same product type with the same input voltage (12 VDC or 24 VDC) for either load sharing applications or redundant applications that use multiple system power supplies.

Note

Your individual requirements for system availability determine where to provide redundancy in a system. Corporate/plant standards or “Hazardous Operations Procedures” for your site often provide guidelines.

The system power supplies provide OR-ing diodes to isolate faults on one supply from the output provided by the other supply.

Different system constraints apply to each type of DeltaV Power Supply. The following sections discuss considerations for each type of power supply.

Using Multiple System Power Supplies

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