All Questions
6 questions
8
votes
1
answer
2k
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What are the drawbacks of connecting circuit GND and Chassis via multiple mounting screws (for EMC and Safety)?
Although there are various suggestions around for how to connect circuit GND to the earthed chassis (say, the chassis has a point-to-point resistance of around 1 mΩ) in devices, there seem to be two ...
- 23.4k
2
votes
1
answer
3k
views
When does a PCB require a chassis ground connection?
Do all PCBs require a chassis ground connection point?
I am designing a circuit board which will be used in many different types of assemblies. It is a small mixed-signal, low-voltage (24 VDC power, ...
- 428
2
votes
1
answer
2k
views
ESD protection to the ground or chassis?
How to add ESD protection diodes to all cables (I/O, positive, ground)(see pink box below). Should I connect them to the chassis or battery negative terminal?
There may be some potential difference in ...
- 181
9
votes
1
answer
5k
views
Is it better to connect ESD (TVS) Diodes to chassis ground or signal ground?
Application: We have a PCBA inside a vehicle's embedded system. The PCBA receives DC voltages from a power input connector. We do have access to signal ground aka 5V_return at the power connector and ...
- 133
6
votes
2
answers
3k
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Connection between Chassis GND and Circuit GND for ESD/transients
All of the images in this post are from Henry Ott's Book, Electromagnetic Compatibility 2009, and I would like some clarification on some things about them.
Figure 14-14 seem to be in conflict with ...
- 57.3k
4
votes
1
answer
1k
views
ESD Protection on Un-grounded Chasis
I am designing a product solution which needs a 240V AC to 12V DC. I am getting that done with one of those standard laptop chargers from a reliable OEM(with necessary certifications) which looks like ...
- 95