I would like to add to the thinking here with a different interpretation, which may help with your thinking. The requirement for two master alarms for Category 1 is not about redundancy of the equipment, but about redundancy in the response. If we could be assured that at all times a single alarm was under observation, there would never be a second alarm required.
It is probable that a single alarm, for instance in the engineering office (best for informing the right person) will broadcast into empty space because they are off doing stuff. Therefore, a second alarm, for instance in security (good chance of someone actually being there) is mandated.
In Category 2 patient care areas procedures are (theoretically at least) more tolerant of outages. One alarm will (eventually) elicit a response.
But are they? Texas obviously does not think so (Thanks Peter) and I doubt the facility’s insurance company would be happy with that answer either.
Locating that second panel in a small facility is definitely not straightforward. The newer technologies (SMS messaging, intranet/internet communication, cellular modems, etc.) can offer a lot of possible answers if the facility and their 6060 are creative and work to meet the intent not just the letter of the Code.
Always remember Clause 1.4.