Keyless access systems

Your assumption is correct, the A-opener can only push the bolts open in one direction... hence the name. It is not a fully electronic lock but an electromechanical one with an automatic mechanical locking function and mechanical/electrical opening capability.

The middle bolt remains as before... only operable with a key.

Day unlocking refers to an unlocked door that can be opened from the outside at any time by pushing. The GU Secury with 2 automatic latch bolts is suitable, among other things, also for RC3 doors. That should be more than enough. If your security needs require it, you can alternatively have the lock as GU-Secury Automatic3, Automatic4, or Automatic6. However, the bolt in the main lock is always operated only by the key. (As mentioned, child lock). So if the door is closed and locked automatically twofold, or threefold, or fourfold, or sixfold mechanically, you can simply open the door from the inside with normal handle operation and from the outside with a 1/3 key turn. Alternatively intercom/fingerprint/code keypad/transponder.... It really doesn’t get any easier. Above all, the door is always "automatically" locked after closing, without you having to do anything. Compared to pure motor locks, this lock also has the advantage that in the event of a power failure, the security function remains fully intact. Only the comfort features (opening via intercom/fingerprint...) fail. But the door is always locked.

Yes, thank you very much for the clarification, now I have a better understanding of the function.

I have looked again at the other lock variants on the [HP] of GU, and it seems that the Secury Series 19 fits my requirements best.

When closing, the door is always locked threefold via latch bolts.
One disadvantage, however, is that the door can always be opened from the inside using the door handle.

Or is locking from the inside with the locking cylinder possible?

That would not be permissible - the panic function should always be left as is.

Or is it possible to lock from the inside using the locking cylinder?

Yes, precisely via the "child safety" of the locks that I described.

Yes, precisely about the "child safety lock" of the locks that I described.

Could you explain the function of the child safety lock to me? Especially in connection with the panic function.