AC / DC power supply:
backup voltage rectifier Hochiki America Corporation

FN-400-ULX, Power Supply

STANDARD FEATURES
Input 115VAC / 60Hz, 1.45 amp.
12VDC or 24VDC selectable output.
Single Class 2 Rated power limited output.
Input fuse rated @ 3.5 amp/250V.
Filtered and electronically regulated output.
Short circuit and thermal overload protection.
AC fail supervision (form C contacts).
Low battery supervision (form C contacts).
Battery presence supervision (form C contacts).
Built-in charger for sealed lead acid or gel type batteries.
Automatic switch over to stand-by battery when AC fails.
Maximum charge current .7 amp.
Zero voltage drop when switched over to battery backup.
AC input and DC output LED indicators.
Accommodates up to two (2) 12VDC/7AH batteries.
Power supply, enclosure, cam lock and battery leads.

More specifications...