Electric Strike Lock with 12V DC Intercom: Issues in Bolt Release & Successful Tab Unlocking

Hello
I have a problem with the operation of the electric lock working with the intercom. The electric lock is 12v DC and the same voltage comes out of the video intercom. After pressing the key on the video intercom, you can hear the sound of releasing the bolt in the electric strike, but the electric strike does not release the tab from the insert. It drops 1 out of every 30 attempts to open it.
What could be the reason?

Most likely, the reason for this state of affairs is the lack of clearance between the electric strike bolt and the lock bolt. The bolt of the lock presses the EZ bolt too hard and this causes the latch not to release.

I'll check it a moment ago. There is a gap between the lock and the electric strike.
When I try to open the electric strike dry (on the other side, the wife turns on the opening of the gate from the video intercom), the electric lock also does not release under light finger pressure. Once it slowed down after about 25-30 presses.

Hello, the bolt of the electric strike must be fully loosened during release, the force of the electromagnet is only enough to undo it and a slight resistance is enough to block it. You need to set the lock so that the bolt can go back without any resistance (if necessary, you can file the place (with looseness) for the bolt if there is no possibility to adjust the catch)

If these procedures do not change anything, it remains to isolate the EZ power supply and use a power supply with higher current efficiency.

Hello. How far is it from the intercom to the gate, what cross-section of the wire did you use?

The easiest way is to check and possibly adjust the lock by pulling up an independent 12V power supply for on-site tests. During this time, the cables from the intercom that were connected to it should, of course, be disconnected.
Once I had to prove to someone that my veins were too small for the lock. At another customer, the lock itself was jammed (not used for years, because it was not connected) and it was enough to use some olive oil and it started working properly.

Or maybe a bit of WD40 will suffice.
Corrosion does not have a good effect on the freedom of movement of mechanical components.

karl102 wrote:

Or maybe a bit of WD40 will suffice.
Corrosion does not have a good effect on the freedom of movement of mechanical elements.

If the bolt is supported, there is no chance for it to go back, all electric strikes have a problem with it. The only solution is to set the lock so that the bolt is released in the normal position.

niutat wrote:

.. The only solution is to set the lock so that the bolt is released in the normal position.

And did I say no?
I have already met bolts so corroded that it was difficult to move the armature to the open position even with a screwdriver.

Maybe the gap is too big?

The electric strike is completely loose because it is new. He's 10 days old
it's the electric one
http://www.napad.pl/katalog/produkty-287-1990-elektrozaczep-e1718-12v-dc-2888.htm
The video intercom is connected in such a way that 2 cables go to the camera and 2 cables go from the camera to the electric lock. The distance of the video intercom to the cameras is approx. 7m and from the camera to the electric lock approx. 80cm
In fact, I probably have to check the cables connecting the camera with the electric strike because they are thin, but I have an additional 1 pair so I will add.
I guess the solution will also be to connect the 12v power supply directly to the electric lock and then it should probably work
I would like to add that the electric strike is low-current, i.e. according to the video intercom specification, it cannot be higher than 300-350mA

If possible, measure the supply voltage and current going to the electric strike when it is turned on.

It's best to try if it works with the gate open. Just use your finger (after hearing that it catches) to try to release it.

Unfortunately, it doesn't work with the gate open either. You can only hear a buzz but the latch does not release. As I mentioned earlier, it drops once every 30 tries.
I'll hook up the extra cable today and let you know how things are going.
Thanks everyone for your help on the topic.

So there is no mechanical problem such as the wicket leaning too much on the catch. So make a short test, i.e. a 12V battery or power adapter (minimum 0.5A and maximum freely), extension cord.
Another option is to remove the lock and check it on the table at home. By the way, how can you mount any of these things without first checking them briefly? You can't fully believe the producers, because then there are such effects. We run back and forth and the problem is still not solved.

One more thing, next to this lock it is written that it is with tongue adjustment. Maybe something needs to be adjusted there?

Hello,
If it is a video intercom from a DIY store (e.g. Futuro), then such problems will occur, because basically only
a short current pulse (DC) to the electric strike and then you need to use e.g. an electric strike with memory and not a regular one. It's just this (Chinese) type has it and that's it :)

Regards
www.alfatech.net.pl

I agree with the speaker. If the manual said that the electric strike with memory, this one is unfortunately not suitable.
By the way, the ones with (mechanical) memory I don't like very much. The point is that if someone in the house presses the unlock button (unnecessarily), the gate will be open all the time until someone goes to open it (physically) and close it again.

Could a colleague write what kind of video intercom, brand, model it is? I am asking because, for example, Laskomex video intercoms require a separate power supply for the electric strike. It's a bit hard to believe that the video intercom requires a memory hook (only and exclusively)

I was installing such a "cheap" video intercom for someone and it was clearly written that the electric strike with memory. The customer already had an ordinary one in the gate and unfortunately only slightly knocked, but not everyone managed to open the gate at that time.
I also assembled more expensive models and there is always only a connection to the lock circuit and of course there must be a separate power supply. However, none of the customers decided to use the lock.

Nowart wrote:

Could a colleague write what kind of video intercom, brand, model it is? I am asking because, for example, Laskomex video intercoms require a separate power supply for the electric strike. It's a bit hard to believe that the video intercom requires a memory hook (only and exclusively)

Oh, there's a whole lot of it in supermarkets, e.g. the aforementioned Futuro, Initel, etc.
nice looking no name chinese production.
A quote, e.g. from the Initel manual: "The intercom is adapted to work with a pulse-controlled low-current electric strike with memory parameters 12V 0.3A (e.g. 1738-12DC by ....)"

Regards
www.alfatech.net.pl

Well, it's actually an invention, I return the honor bypassing such intercoms, regarding the hooks with memory, I support my friend zybex, if you press it and you don't open it, the plate keeps it open until someone comes in. This is good but not in every case, e.g. with two inputs one after the other (as the second) memory is useful, but for solo it is not very good for me.

I also installed an electric strike so that when you press the button, the gate will spring back and you have a signal at home that it is open. There is simply an auxiliary microswitch in the electric strike. I connected the electric strike, but without the intercom. A friend just wanted a ringtone.

Coming back to the original problem - I had exactly the same and even with the same hook. The hook worked on the test and for some time after plugging in. After a month it stopped opening. At first I thought it was a matter of poor cables, but the measurements showed that everything is fine. It was also not a matter of too short a signal from the intercom because I can adjust its length. Having no other idea, I treated the hook with WD40 and it started off - it opens without a problem. It is possible that long rains and high humidity killed him.