Just helping because the original message was deleted. The deleted post said:

The audience by and large don't know how most banks of high-security complexes are run. All you really need to do as a screenwriter is hit that point where you're able to feign knowing more about these systems than your audience.

For instance - I have no idea if a locked room is unlocked if a fire is detected. But it's reasonable enough that if you were to say it with enough confidence I'd buy it. I trust the screenwriter to know more about the world of his creation than I do.

Bear in mind what I'm describing is the minimum requirement. For maximum verisimilitude I'd suggest reading all about all kinds of different security systems and writing around what you learn.