Kentec Electronics Sigma A-CP - Internal Power Supply

Internal Power Supply
The internal power supply of the Sigma A-CP Fire Control Panel meets UL 864, 9th edition and
provides a 4 Amp, linear power-source for operating FACP functions as well as charging the standby
batteries.
Reference Appendix C, Calculations to determine load current limitations of the 4 Amp power supply.
Features of the internal power supply include:
Battery-Backup
Provides battery power to the load when the AC input of the power
supply falls below the rated level. The voltage at the load remains
within the specified range during these switching-transitions.
Short-Circuit Protection
Provides a shut down on the load side of the power supply when the
load-current exceeds the maximum level.
Status
The AC input to the power supply is supervised by the Sigma A-CP
Fire Control Panel. The control panel provides an LED status display
for normal and trouble conditions. Normal conditions occur when
the power supply is operating in an acceptable range. Trouble
conditions occur when the power supply is not operating in an
acceptable range.
Power Outputs
The Sigma A-CP Fire Control Panel provides power outputs to the terminals of NAC 1, NAC 2, and AUX
24V terminals.
Reference Section 3, Installation and Appendix A, Specifications for further information concerning NAC
and AUX 24V outputs of the Sigma A-CP Fire Control Panel.
NAC Outputs
NAC outputs of the Sigma A-CP Fire Control Panel are programmable and can be operated in
regulated or special application mode.
Reference Appendix A, Specifications for constraints and operating levels of these NAC output modes.
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