How many wired sirens can a Honeywell Vista 10P handle?

If you're looking to hook up multiple wired sirens to your Honeywell Vista 10P, it's doable, but you better get out that calculator and get prepared to look at technical data sheets.

When wiring multiple sirens to a Vista 10P panel, you'll be hooking them all up to the same wired siren output on the panel, which are terminals 3 and 4.

Because there's only one set of terminals and multiple sirens, you're going to have to hook them up in parallel.

Running them in parallel simply means you're plugging all the positive terminals of the sirens into the same positive terminal (3) on the 10P and all the negative terminals of the sirens to the negative terminal (4).

The current will then be divided out amongst all the sirens so you'll have to worry about maximum current draw.

At 12 VDC, the built-in power supply will be able to handle up to 2 amps via the siren output terminals.

Therefore, you'll have to check on the current draw of your wireless siren at 12 VDC. Take the popular Honeywell WAVE2 two-tone siren as an example.

At 12VDC it can draw up to 500mA, or 0.5 amps. That means you'll be able to handle up to 4 (2 / 0.5) sirens using the built-in power supply.

If you need more, you'll have to hook up an auxiliary power supply like the Honeywell AD12612 or Altronix SMP3.

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