NFS-640 Installation Manual P/N 51332:B1 12/01/2003 75
Appendix B Electrical Specifications
B.1 Electrical Specifications
AC Power
Note: If using an auxiliary power supply such as APS-6R, ACPS-2406, or audio amplifiers, refer to the
documentation for that equipment.
Batteries
The control panel uses only sealed lead-acid batteries for secondary standby power. Maximum battery
capacity for the control panel’s integral main power supply is 55 AH. Batteries larger than 25 AH
require the NFS-LBB or other UL-listed battery cabinet. The table below contains specifications for
batteries that can be used with the control panel; see also Appendix A.3.2 “Calculating the Battery
Size”:
Component Values
Main Power Supply 120 VAC, 50/60 Hz, 3.0 A; or
240 VAC, 50/60 Hz, 1.5 A
Wire size
Maximum 12 AWG (3.1 mm
2
) with 600 VAC insulation
Charger Description Specifications
Main Power
Supply
An internal battery charger
for 12 AH to 55 AH
Dual Rate: High Charge: 29.1 VDC
Normal Float Charge: 27.6 VDC
Charging Current: 2.0 A max (1.5 A typical)
CHG-120
Battery Charger
An external battery charger
designed to charge lead-
acid batteries between 25
AH and 120 AH
Dual Rate: High Charge: 28.1 VDC
Normal Float Charge: 27.6 VDC
Charging Current: 4.5 A
ACPS-2406
Auxiliary
Charger/Power
Supply
An internal battery charger
for 7AH to 25 AH
Normal Float Charge: 27.6 VDC
Charging Current: 1.1 A max (0.750 A typical)
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