As a locksmith and an access control technician and installer

ooooh, oooh, oooh can I guess?
Is it keyless door latch or security system item.
Did I win?
Brzrkr

 

To answer the OP's question in a nut shell "Can a Board accept AC or DC".
Then the ideal would be to make the device Capable of DC input, it can then be fed with a 'Steering Diode" bridge rectifiers, as has already been covered..
Which makes it a AC/DC Universal device!.
Max.

 

All this item does is the control work, still needs a key pad and a lock mechanism. Has to have both AC Or DC to suit the actual lock mechanism. And probably has no filter capacitors so it wouldn't need a voltage regulator to drop the DC output.

 

Actually, we do need more information that just the required load voltage and current. We also need to know how much ripple voltage the application can live with. An AC/DC, 12 or 24 volt input supply is not that difficult nor that complex, unless it is for a "life-critical" function. So we need to know about that as well. Not what, but "if" it is.

 

Actually, we do need more information that just the required load voltage and current. We also need to know how much ripple voltage the application can live with. An AC/DC, 12 or 24 volt input supply is not that difficult nor that complex, unless it is for a "life-critical" function. So we need to know about that as well. Not what, but "if" it is.

What is "life-critical" about a solenoid lock?

 

I fixed a battery charger the other month. The AC transformer was open. To test the pcb I fed it smooth regulated DC from my bench power supply at the same voltage. Worked perfectly, the first thing on the pcb was a full wave bridge rectifier

 

What is "life-critical" about a solenoid lock?

At the time I wrote that I did not know it was a lock. AND, if it is on an exit door that must be unlocked to leave, a fire exit is certainly a life critical thing.

 

As a locksmith and an access control technician and installer

How did we come to the assumption this is for an electronic control entry point? I get the "Life Critical" point, but access to a secure building isn't life critical. Getting out in case of a fire - that's another story. But back to the initial question - how can a board accept AC or DC - the answer has been given: "It does so with (most likely) a bridge rectifier."

Regardless of what the Thread Starter (TS) intends to do with the information - this thread isn't about how to break into the Space Shuttle. Simple question. Simple answer. We can belabor the point what the TS may be intending to do - but I'm not falling into that rabbit hole.

 

Consider that I did mention in my first post that the application did not matter if we knew the current and voltage requirements, and then added that ripple voltage was also a consideration. The "life critical" qualifier I added just because we were not privy to details, and so I was covering my @$$ by adding that. Since we do not know, we must presume that we do not know what the application is. My mind reading skills are still very poor, and so I do not presume, only add a caution. And I have already asked Alice about the rabbit hole. (White Rabbit, Jefferson Airplane, long ago).

 

I have already asked Alice about the rabbit hole. (White Rabbit, Jefferson Airplane, long ago).

Definitely recall that song.
One pill makes you larger and one pill makes you small.
And the ones mother gives you don't do anything at all.

 

Where I live a door with an electric lock must have a manual override to meet fire code.

 

Where I live a door with an electric lock must have a manual override to meet fire code.

Please consider that the TS gave us no clues about what the device was, and so everything is guesses by others. AND while codes state one thing, not everybody everywhere always follows the letter of those codes. One place where I was employed it took a locksmith about half an hour to get the fire exit door open to change the lock. Thus reality is often different from wishes.

 

From the document to which @shortbus linked:
It looks like there is no problem at all since the product was designed to accept 12 to 24 VDC or VAC. That was a quick fix!

At the time I wrote that I did not know it was a lock.

How did we come to the assumption this is for an electronic control entry point

Please consider that the TS gave us no clues about what the device was, and so everything is guesses by others.

You need to read the whole thread to keep up.