MEAN WELL PSP-600 series 600W with PFC and 
Parallel Function Owner's Manual

https://www.meanwell.com/Upload/PDF/Enclosed_Type_EN.pdf

1. Parallel operation is available by connecting the units shown as below (+S,-S and P are connected mutually in parallel) :
2. The voltage difference among each output should be minimized that less than 0.2V is required.
3. The total output current must not exceed the value determined by the following equation (Output current at parallel operation) =(The rated current per unit) x (Number of unit) x 0.9.
4. In parallel operation 4 units is the maximum, please consult the manufacture for other applications.
5. When remote sensing is used in parallel operation, the sensing wire must be connected only to the master unit.
6. When in parallel operation, the minimum output load should be greater than 3% of total output load. (Min. load > 3% rated current per unit x number of unit)

Documents / Resources

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References

• User Manual