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NFS2-3030/E Installation Manual — P/N 52544:N1 07/18/2014
Appendix A: Electrical Specifications
A.1 Operating Power
DC Power
The control panel requires connection to AMPS-24, which is a +24 VDC regulated,
power-limited power supply, UL/ULC-listed for fire protective service, that can supply 0.1 amps
continuous for CPU2-3030ND (0.3 amps for CPU2-3030D). For complete battery/current draw
calculations, refer to the main power supply manual; if using an auxiliary power supply, there may
be additional calculations in that manual.
A.2 SLC Loops
Listed below are specifications for a Signaling Line Circuit loop. Refer to the SLC Wiring Manual
for more detailed specifications and specific device listings:
A.3 Notification Appliance Circuits
The FCPS-24S6 and FCPS-24S8 power supplies provide Notification Appliance Circuits. Refer to
the FCPS-24S6/S8 manual for product-specific specifications. Refer to the Device Compatibility
Document for compatible devices and notification appliances. Refer to the FCPS-24S6/FCPS-24S8
Manual for complete details about this power supply.
A.4 Wire Requirements
Each type of circuit within the Fire Alarm Control System requires use of a specific wire type to
ensure proper circuit operation. The wire gauge of a particular circuit depends on the length of that
circuit and the current traveling through it. Use the table below to determine the specific wiring
requirements for each circuit.
Compliance with the Federal Communications Commission (FCC) and Canadian Department of
Communication regulations on electrical energy radiation requires the following: Use twisted-pair
shielded wire for any non-SLC-loop wiring entering or exiting the cabinet that is not enclosed in
conduit. Use twisted-pair unshielded wiring for SLC-loop wiring.
Item
Value
Voltage
24 VDC nominal, 27.6 VDC maximum
Maximum length
The maximum wiring distance of an SLC using 12 AWG (3.25 mm
2
) twisted-
pair wire is 12,500 ft. (3810 m).
Note:
Refer to Appendix A.4 “Wire Requirements” for limitations.
Maximum current
130 mA: LCM-320
100 mA: LEM-320
400 mA max*: Single SLC loop; for battery calculations use 200 mA
*Max short circuit…circuit will shut down until short circuit condition is
corrected.
Maximum resistance
50 ohms (supervised and power-limited). For additional notes on SLC
resistance values, see Section 5.3 “Operational Checks”.
NOTE:
If running an SLC in conduit with Notification Appliance Circuits, you can reduce
problems by exclusively using electronic sounders (such as the MA/SS-24 Series) instead of
more electronically noisy notification appliances (such as electromechanical bells or horns).
