oahmad
Newbie level 5
Hi,
Please see attached pdf.
I'm designing a mixed signal system that is to be powered from an off-the-shelf AC/DC converter. After conversion from the AC/DC, I have two systems that need DC power. System1 PCB is going to be on the same enclosure as the AC/DC power supply; System2 PCB is at the end of a 12 foot long cable. Since I have sensitive analog circuitry on both boards, I'm planning on using flyback regulators on both boards. Also, System1 and System2 will need to talk to each other, so I'm going to use a galvanically isolated datalink to pass digital data between them.
Is my attached diagram a good way to deal set this up? I am going to design the two pcbs have an edge copper area with mounting holes that will be connected to the AC/DC Earth connection, however, there will be no connection to this edge to anything in the PCB itself. The local power and ground will be from the V+ and V- of the flyback converters. My thought is that this way, the absolute difference in potential between the two systems will be small.
Is this a good way to approach grounding in an isolated power system such as this?
Thanks!
Please see attached pdf.
I'm designing a mixed signal system that is to be powered from an off-the-shelf AC/DC converter. After conversion from the AC/DC, I have two systems that need DC power. System1 PCB is going to be on the same enclosure as the AC/DC power supply; System2 PCB is at the end of a 12 foot long cable. Since I have sensitive analog circuitry on both boards, I'm planning on using flyback regulators on both boards. Also, System1 and System2 will need to talk to each other, so I'm going to use a galvanically isolated datalink to pass digital data between them.
Is my attached diagram a good way to deal set this up? I am going to design the two pcbs have an edge copper area with mounting holes that will be connected to the AC/DC Earth connection, however, there will be no connection to this edge to anything in the PCB itself. The local power and ground will be from the V+ and V- of the flyback converters. My thought is that this way, the absolute difference in potential between the two systems will be small.
Is this a good way to approach grounding in an isolated power system such as this?
Thanks!