There are many methods of controlling access, but not all are worth recommending. When it comes to asking for help, ADI has plenty of advice. But how good are those designs? Do they have your best interest, or their suppliers, in mind when handing out solutions?
We take a look at one simple access example in the note that follows.
The Design Problem
National distributor ADI issues 'price specials' every month. This month they are featuring products from access hardware maker SDC. Catch this video:
Behind an unrealistic mock phonecall between an installer and SDC/ADI phone operators lie an interesting and common access design problem.
You left out the cost of having the fire alarm provider back to add a device to connect your mag lock based system to the alarm system which is required by every AHJ I have ever dealt with......and not required by your Trilogy based system.
As you, Brian, I would like to find a less expensive, dependable single door system than what you proposed but so far, I have not.
I mentioned it, but could not count it as a hard cost not knowing whether or not there is a fire alarm to begin with. But in real costs, it adds $30 - $200 to the job just in overhead. (additional gas, non-productive time, phonecalls, trip charges for the fire tech, etc)
You're likely looking at multiple trips to the site if using a maglock... even just one, on one door. Yikes!
A sensor must be mounted on the egress side to detect an occupant approaching the doors. Doors must unlock upon a signal from the sensor or loss of power to the sensor.
A manual unlocking device (push button) shall result in direct interruption of power to the lock – independent of the access control system electronics. When the push button is actuated, the doors must remain unlocked for 30 seconds minimum. The push button must include signage stating “Push to Exit” and must be located 40” to 48” vertically above the floor and within 5’ of the doors. Ready access must be provided to the push button.
You might get away with only a pushbutton in some jurisdictions, but never just a PIR. Too risky. The PIR is there for convenience during normal operation, so the door 'automatically' unlocks without requiring people to push a button first.
If you have to call your ADI or SDC sales guy to figure out what to use for this door, then you probably shouldn't be licensed to do the work in the first place. This is a prime example of the traditional ADI customer profile, and a great example of why we don't fit in with their sales model.