Viking VFR-400 Current Requirements, Secondary Power Supply Requirements, Calculation Table

VFR-400 • 5403548 • REV D • 10/07

TABLE 1						CURRENT REQUIREMENTS
			Module/Device				Standby mA*		Alarm mA**
				VFR-400			121		274
				RA-4410-RC			12		12
*Add 23 mA plus current requirement of all devices connected for each output programmed as Trouble Bell
**Includes one zone short circuit current.
TABLE 2				SECONDARY POWER SUPPLY REQUIREMENTS
Service Use								Standby Time		Alarm Time
NFPA 72
•	Central Station (PPU)							24 hrs.		5 mins.
•	Local							24 hrs.		5 mins.
FMRC 1011 and 1012, Deluge and Pre-action Systems								90 hrs.		10 mins.
Where requested by FM or others.
90 Hours is not a UL requirement.
					CALCULATION TABLE
	1	2		3			4		5	6
Module/Device		Quantity		Standby mA Per Unit Total Standby Current Alarm mA Per Unit						Total Alarm Current

Total mA		Total mA
Convert to A	x 0.001	Convert to A	x 0.001
Total A		Total A
Multiply by hours from table 2	x ___	5 min/12 or 10 min/6	÷ ___
Total Standby AH		Total Alarm AH
		+ Total Standby AH
		Total AH
		Efficiency Factor	÷ 0.85
Use a battery with a higher AH rating than Required AH		Required AH

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