Nfpa Class A Slc Using Isolator Modules - Honeywell NOTIFIER SLC Wiring Manual

NFPA Class A SLC Using Isolator Modules

5.5 NFPA Class A SLC Using Isolator Modules
A variation of Class A operation using isolator modules to protect a section of the SLC. By flanking each group of devices with
fault isolator modules each group is protected from faults that may occur in the other groups. For example, a fault in Section B will not
affect Sections A & C. The isolator modules on either side of Section B will open the loop. Section A will still operate from power on the
SLC Out side and Section C will operate from the SLC Return side.
• A combination of isolator modules and isolator bases may be used.
• T-tapping is NOT allowed within the Class A configuration.
• Isolator modules shall be within 20 ft. (6.1 m) of device and the wire must be enclosed in metal conduit.
AFP-100, AFP-200, AM2020/AFP1010,
System 5000 with AIM-200: The first
isolator module on SLC Out and SLC
Return must be contained within the same
enclosure as the FACP, or these isolator
modules must be connected within 20 ft.
(6.1 m) of the FACP enclosure in conduit.
Notifier SLC Wiring Manual — P/N 51253:U9 12/3/2021
Isolator
Module
Two-wire
Addressable
Detector
Section A
Additional isolator module required when first device in the
section is more than 20 feet from the control panel.
Isolator
Module
The first isolator module on SLC Out and SLC Return is
optional for the N16, NFS-320, NFS2-640, NFS2-3030,
Isolator
NFS-640, NFS-3030, AFP-300, and AFP-400 because the
Module
Figure 5.6 NFPA Class A SLC Using Isolator Modules
Section B
panels provide the functionality.
SLC Out SLC Return
Control Panel
SLC Circuits with Isolators
Isolator
Module
Section C
Addressable
Pull Station
Isolator
Module
Isolator
Module
35