The ACM has an optional 12 volt NiMH battery, which provides backup power that allows for orderly shutdown should power remain OFF for more than 60 seconds.
Features & Benefits
Certifications: EN 62133 ed 1 [2002], ed 2 [2012], UL 2054 ed 2 rev 2011-09-14
Maximum Operating Humidity: 95 [Non-Condensing] Percentage Relative Humidity