Installation Installing the Control Panel
40 NFS-640 Installation Manual P/N 51332:B1 12/01/2003
3.5.12 NAC Connections & Releasing Circuits
The control panel provides four NAC terminals as shown in
Figure 16. Each can be configured as Style Y (Class B) or
Style Z (Class A) as shown in Figure 17. Each circuit can
provide 2.5 A of current, but the total current drawn from the
main power supply cannot exceed 6.0 A in alarm condition
(refer to Table 12). NAC circuits are supervised and power-
limited. Use UL-listed 24 VDC notification appliances only
(refer to the Notifier Device Compatibility Document).
Note: Any NAC can be programmed as a releasing circuit,
but only one releasing device per circuit is allowed. For
more information, refer to Section 4.5 “Releasing
Applications” in this manual and the NFS-640 Programming
Manual. Refer to the Device Compatibility Document, for UL-
listed compatible releasing devices. Sample connections for
NAC terminals are shown in Figure 17. Follow sequence of
steps in Section 3.2 “Installation Checklist”, Table 2; this is
part of Step 6.
Figure 17 Notification Appliance/Releasing Circuit Connections
3.5.13 Output Relay Connections
The panel provides a set of Form-C relays. These are rated for 2.0 A at 30 VDC (resistive):
• Alarm - TB8
• Trouble - TB9
• Supervisory - TB10
• Security - TB11
The Supervisory and Security contacts can also be configured as Alarm contacts by setting
switches SW1 and SW5 away from the factory default positions shown in Figure 18. Follow
sequence of steps in Section 3.2 “Installation Checklist”, Table 2; this is part of Step 6.
B+ B- A+ A- B+ B- A+ A- B+ B- A+ A- B+ B- A+ A-
Figure 16 NAC Terminals
TB6 - NAC#1
TB5 - NAC#2
TB4 - NAC#3
TB3 - NAC#4
nfs640-NACS.cdr
B+ B– A+ A– B+ B– A+ A– B+ B– A+ A–
nfs640-nacout.cdr
Style Y (Class B)
Connection
Style Z (Class A)
Connection
Unused
Circuits
UL-listed ELR-2.2K,
1/2 W (supplied)
To Next Page
Loading...
Need help?
General
