To install Notification Appliance Circuits (NACs) on the Sigma A-CP Fire Control Panel:
1
Connect Notification Appliances and End-Of-Line-Devices to the NAC channel.
Notification Appliances must be wired in a daisy-chain without T-Tap connections. End-Of-Line-Devices must
be connected to the last Notification Appliance in the daisy-chain.
2
Maintain the limit for maximum wire length of the circuit.
3
Maintain maximum current limits and loading.
The Wiring Diagram below illustrates NAC Circuit Connections on the Sigma A-CP Fire Control Panel:
Figure 3- 7
NAC Circuit Connection
Relay Outputs
Volt free changeover relay contacts are provided for local control and signaling. These contacts are
rated for switching signaling circuits and must be operated within specified ratings.
Reference Appendix A, Specifications for relay ratings of Sigma A-CP Fire Control Panel.
Optional Dialer Board
The Optional Dialer Board is an optional feature provided on specific models of the Sigma A-CP Fire
Control Panel.
Mount the Optional Dialer Board on the Main Board of the Sigma A-CP Fire Control Panel.
10K End Of Line
Resistor (EOLR)
NAC Device 1
+ In
+ Out
- In
- Out
NAC Device 2
+ In
+ Out
- In
- Out
NAC 1
+ -
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