Yes. It's not labeld to be a "digital" or an "analogue" output. But once you decided to put a didital pedal to - lets say - power output #3, then this makes your power output #3 a digital output = you use it for digital guitar effects only, but not for analogue ones. The idea behind is: You can split one output with twin or triple cables, so you can empower two or three (or more) devices with one and the same output. But don't put analogue and digital devices to one and the same power output, that might cause issues. When a power output has 9 Volts and allows 400 mA, this means: you add the current draw of your devices all together and make sure they are in their entirety not using more than 400 mA.
I give you four examples, and you tell me if each would work or not. Power output #3 has 9 Volts, 400 mA.
a) anaologue Chorus/150 mA, analogue EQ/40 mA, Overdrive (analogue)/35 mA, analogue Delay 120 mA
b) digital Chorus/150 mA, digital Delay/160 mA, digital Tuner/60 mA
c) analogue Chorus/150 mA, Overdrive (analogue)/35 mA, digital Delay/160 mA, Harmonizer (digital)/230 mA
d) analogue Flanger/50 mA, analogue Chorus/150 mA, Overdrive 1 (analogue)/35 mA, Overdrive 2 (analogue)/70 mA, Overdrive 3 (analogue)/95 mA
Which will work, which? Please give the reason for your answer on each.
I will later give you an excercise. We'll have 20 effects pedals, one power station, I'll give you the technical specifications and you write me your theory on how to to connect them properly and correct. After our course you'll be well into it all and won't make any mistakes or even screw up your devices when you build and set up your pedalboard.