Using multiple bulk power supplies for redundancy and load sharing

The AC to 24 VDC bulk power supply can be used in systems that require load sharing and redundancy. The supply contains integrated circuitry to isolate power supply faults.

If your system uses redundant system power supplies, connect the primary bulk power supply to the primary system power supply and the secondary bulk power supply to the secondary system power supply.

The following table shows the current provided to the system based on the number of bulk power supplies and the power scheme (simplex or redundant).

Number of bulk power supplies	System current provided by simplex power	System current provided by redundant power
1	12 A	N/A
2	24 A	12 A
3	36 A	24 A
4	48 A	36 A
5	N/A	48 A

Connecting bulk power supplies for redundancy or load sharing

If the bulk power supply is used in a system that requires redundancy or load sharing, connect the SHARE terminals on the top of the power supplies to terminal strips or bus bars as shown below in the following figures. One or both of the VOUT (+) and RTN (-) connections must go to the same location

Figure: Two bulk power supplies connected for redundancy or load sharing

This figure shows the connections for four bulk power supplies. A fifth supply can be connected in the same manner for redundancy.

Figure: Four bulk power supplies connected for redundancy or load sharing