ALM RES
ALM RES inputs are unused on the terminal-strip of the fire control panel:
Terminal
Function
SIL
No Connection (NC)
ALM
NC
TRBL
NC
RES
NC
Notification Appliance Circuits (NAC) s
Notification Appliance Circuits (NAC) s, NAC 1 and NAC 2 are unregulated and special application. Each
of the NAC 1 and NAC 2 outputs are rated to provide a maximum of 2.5 Amps. The combined output
of NAC 1 and NAC 2 cannot exceed 4 Amps.
The NAC channels are rated for regulated conditions when each output operates at or below 250 mA.
NAC circuits are supervised for ground-faults, open and short circuit conditions by placing a 10K EOL
resistor, K1895-00 across the last device on the circuit. NAC circuits must be wired as a single circuit to
enable the supervising circuit to operate.
The NAC channels are rated for regulated conditions when each output operates at or below 250 mA.
NAC circuits are supervised for ground-faults, open and short circuit conditions by placing a 10K EOL
resistor, K1895-00 across the last device on the circuit. NAC circuits must be wired as a single circuit to
enable the supervising circuit to operate.
NAC circuits must also be wired in a daisy-chain without T-Tap connections. NAC outputs of the Sigma
A-CP Fire Control Panel accept devices that are polarized only. A trouble condition is reported when
non-polarized NAC devices are connected to these NAC outputs.
NAC 1 and NAC 2
The Sigma A-CP Fire Control Panel provides synchronized outputs on NAC 1 and NAC 2 with built-in
synchronized protocols.
These terminals are authorized for special application or synchronized pulsed DC output voltage.
Special application outputs maintain continuous DC output voltage.
Reference Appendix A, Specifications to identify characteristics of the NAC 1 and NAC 2 special application
outputs. Reference Appendix B, Equipment List for a list of compatible NAC devices.
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