For both identical and different models: How many Pro 2 Power Supplies can I run in parallel?
The number of Pro 2 Power Supplies of the same type connected in parallel is not initially limited, as long as the parallel connection is established to external rail-mount terminal blocks and through cables of the same impedance to the rail-mount terminal blocks. Parallel operation of different versions – for example 10 A and 20 A power supplies – is also possible in the “Active Droop” operating mode (factory settings).