Re: AV3 - IO Fire Interface Programming
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The problem with using NO is it¡¯s (even less) fail safe. NC/Normally closed should be used because if the wire is cut/broken/burned through/etc. the system will default to the ¡°safe¡± state of audio muted. ? That said, since (AFAIK) neither Crestron hardware nor programming is actually rated for life safety purposes, this input should really be used to cut AC power to the amplifier or tied directly to the DSP (which at least gets the failure points of the Crestron processor, the Crestron programming, and the communication between the Crestron processor and the DSP out of the mix) ? Lincoln ? -- Lincoln King-Cliby, CTS, DMC-E-4K/T/D Commercial Market Director Sr. Systems Architect | Crestron Certified Master Programmer (Gold) ControlWorks Consulting, LLC V: 440.449.1100 x1107 F: 440-449-1106 I: Crestron Services Provider | Biamp Audia Certified | Extron Control Professional ?
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From: Crestron@... [mailto:Crestron@...] Sent: Monday, October 13, 2014 8:21 AM To: Crestron@... Subject: [Crestron] Re: AV3 - IO Fire Interface Programming ?
Use NO (Normally open) and Common wired into an I/O. When the Input closes, mute the system, and lock out any TP controls. Just as if it were a button. When it opens, unmute and remove panel lockout, or make the system flip to a page that lets the user knows the fire alarm was active, and to ¡°press here to go back to system¡±. That button unmutes. ? Davis ? ?
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