Just need a little guidance here about designing a PCB for an enclosure.
I’ve designed a PCB that is supposed to slide into an extruded aluminum closure, like this one:
This enclosure will rest on an ESD bench mat in a manufacturing station. It will have connectors in the back with signals, power and ground going to my PCB.
I am trying to decide whether or not I should deliberately connect the GND of my PCB to the chassis.
So, three questions:
Should I connect the GND of my PCB to the chassis? The chassis will definitely be connected to earth on an ESD mat.
If I do need to connect my chassis to the PCB’s GND, what’s the best way to do that? The enclosure is certainly designed for 75mm wide PCB’s, but there are no screw holes nor any obvious place to tap holes. It is intended to have PCB’s slid into it. I am assuming that I just need to find the symbol & footprint for a “strip” that runs along the edge of the PCB. Can’t find it, what is it called?
If I do not need to make this connection, is it “OK” to just rely on the PCB mask to avoid all electrical contact with the chassis? The board will be slid in once and almost never removed.