Installation 3
Shield Fire, Safety and Security Ltd.
Shield A-XT Releasing Fire Control Panel - Installation and Operation Manual SEXTCP-OM
Revision E01.00
28 of 127
Remote Control Inputs
Remote Control Inputs are unused on the terminal-strip of the fire control panel:
Notification Appliance Circuit (NAC)
Notification Appliance Circuit (NAC) outputs of NAC 1, NAC 2 and NAC 3 are rated for special application and
regulated outputs. The NAC channels are rated for special application conditions when each output operates at or
below 500 mA. A maximum load of 1.5 A is available for powering the NAC outputs when a maximum load of
500 mA is operating on any one of the NAC outputs. The NAC channels are rated for regulated conditions when each
output operates at or below 50 mA.
NAC circuits are supervised for ground-faults, open and short circuit conditions by placing a 10K EOL resistor,
SEOLR-10 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-Top connections.
NAC outputs of the Shield A-XT Releasing 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 2
NAC 1 and 2 of the Shield A-XT Releasing Fire Control Panel provide single and dual circuit synchronization for Zones 1
and 2 when operating with authorized synchronization modules. Single circuit synchronization provides
synchronized NAC outputs on one channel of the Shield A-XT Releasing Fire Control Panel. Dual circuit
synchronization provides synchronized NAC outputs on two channels of the Shield A-XT Releasing Fire Control Panel.
The output of NAC 1 and NAC 2 is special application and provides a continuous DC 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.
NAC Extenders
Listed NAC Extenders that perform in the range of 18 to 28 VDC and draw less than 500 mA are authorized to
operate on the outputs of NAC 1 and NAC 2.
Reference manufacturer instructions for specific NAC Extender connections and requirements.
Terminal Function
ROV No Connection (NC)
SIL NC
AL NC
FLT NC
RST NC
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