Legal Removal Request

Post: Hi, I want to use the Raspberry pi With [b]IO Pi Plus [/b]to control [b]24V load[/b] (i.e dc motor) offcourse i need isolation between 24v circuit to the (Rpi+IO Pi) 5V - this question is about the power supply: [b]1. Raspberry Pi [/b]require[b] 5V 2.5A [/b]power supply 2. I have 2 [b]IO Pi Plus[/b], i want to connect them to "external" [b]5V power supply - not from the Pi[/b] (I'll remove the pre-soldered Link) as recommended here: https://www.abelectronics.co.uk/p/54/IO-Pi-Plus 3. also connecting [b]output pin from IO Pi Plus[/b] to power [b]24V[/b] dc motor with opto-isolator circuit as explained here under "Driving opto-isolators with the IO Pi" : https://www.abelectronics.co.uk/kb/article/1052/driving-relays-or-higher-loads-with-the-io-pi How i can use only 24V 10A power supply to supply the 5V for the RPI itself, and also to 2 IO Pi Plus boards and also to drive the opto-isolator/optocoupler in the isolated 24v circuit that power the dc motor. Can i do that with voltage regulators ? how ? Which grounds need to be conneted together so they have common ground ? Does the 5V power supply that power the IO Pi Plus need to have same ground as the Rpi or it need to be completly isolated (i think so, this is the purpose of removing the Link solder, no?) Thanks !