70
NFS2-640/E Installation Manual —
P/N 52741:P2 7/10/14
Appendix B: Electrical Specifications
B.1 Electrical Specifications
AC Power
Batteries
The control panel uses
only
sealed lead-acid batteries for secondary standby power. Maximum
battery capacity for the CPS-24/E main power supply is 200 AH. CAB-4 Series backboxes provide
space for two 26 AH (or smaller) batteries. Use external battery boxes if the installation requires
larger capacity batteries; see Table A.5, “Selecting Battery and Battery Backbox,” on page 69.
The table below contains battery charger specifications.
Signaling Line Circuit (SLC)
Component
Values
Main Power Supply
120 VAC, 50/60 Hz, 5.0 A; or
240 VAC, 50/60 Hz, 2.5 A
Wire size
Maximum 12 AWG (3.31 mm
2
) with 600 VAC insulation
NOTE:
If using an auxiliary power supply such as FCPS-24S6/S8, APS-6R, ACPS-2406, or
ACPS-610, or audio amplifiers, refer to the documentation for that equipment.
Charger
Description
Specifications
CPS-24/E
Main Power Supply
An internal battery charger
for 18 AH to 200 AH
Normal Charge: 27.6 VDC +/- 0.24 VDC
Charging Current: 2.0 A or 5.7 A (Software selectable)
CHG-120
Battery Charger
An external battery charger
designed to charge lead-acid
batteries between 26 AH and
120 AH
Dual Rate: High Charge: 28.1 VDC
Normal Charge: 27.6 VDC
Charging Current: 4.5 A
ACPS-2406
Auxiliary
Charger/Power
Supply
An internal battery charger
for 7AH to 26 AH
Normal Charge: 27.6 VDC
Charging Current: 1.1 A max (0.750 A typical)
ACPS-610
Addressable
Charger/Power
Supply
An internal battery charger
for 12AH to 200AH
Normal Charge: 27.6 VDC +/- 0.24 VDC
Charging Current: 2A, 5A, or OFF (Software Selectable)
Item
Value
Voltage
24 VDC nominal, 27.6 VDC maximum
Maximum length
12,500 ft. (3810 m) total loop or circuit length (NFPA Style 4, 6 and 7)
Note:
Refer to Appendix B.2 “Wire Requirements” for limitations.
Maximum current
400 mA peak, 200 mA average (max short circuit; circuit will shut down until
short is fixed). For battery calculation purposes use 200mA.
Maximum resistance
50 ohms (supervised and power-limited)
