Category:PCB PCB Design Rules

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Initially PCBs were designed manually by creating a photomask on a clear mylar sheet, usually at two or four times the true size. Starting from the schematic diagram the component pin pads were laid out on the mylar and then traces were routed to connect the pads. If you have many questions of PCB Design, please come here!

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Grounding between enclosures Reply 2016-04-07 10:41:53
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Artur Assun??o

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Our overall system is fed AC power and converted to 28V with an off-the-shelf converter. Currently the enclosures we are designing each have a PCB internally and currently these PCB's power supplies are tied to the same ground. I'm contending that the grounds should be connected because there won't be any common reference for the single ended connections between each enclosure. Do these lower voltages need to be isolated from the 28V?
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Statement: This post is only the personal view of the author and does not represent the opinions of ALLPCB.com.

potluck9

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All blocks of each enclosure will form a Star ground to the chassis. Then, each enclosure will form a Star ground to the external supply. The supply should then be earth grounded.

Earl Swope

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It is known that you are showing analog and signal grounds being connected between the two boxes. So connecting the power grounds together is not a great idea. You are inviting ground loops.

manuelnt11

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If your boxes are at all separated physically, and your interconnecting signals are low voltage/ high impedance, you will be very well advised to use differential transmission for your interbox signals
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