Can AC and DC voltages be on the same pcb ?

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auto_mitch

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AC and DC on a pcb

Hi everyone!
I have built a control unit with an mcu which drives a few relays. The relays's contacts control (ON/OFF) AC devices. The mcu and the relays (24 Vdc) are on the same pcb at the opposite direction. Is that normal, being DC and AC Voltages on the same pcb?
Thanx
 

AC and DC on a pcb

Its alright as long as you isolate them properly. Use guard ring from DC supply ground to physically splitting the area. Relay is a good isolation device, there shouldn't be any disturbance, especially if you use relay controller circuit.
 

Re: AC and DC on a pcb

It would be advisable to keep AC and DC grounds separate
 

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