We are designing an industrial control board. The input voltage of the board is +12V, ground and -12V. Our previous design does not include any power protection and now I want to add over voltage and ESD protection, as well as voltage polarity protection.
- Could I have comments on the design?
- Can this set up secure the system from all kinds of wrong voltage inputs?
- What shall be the clamping voltage of the zener diode? Shall it be around +15V?