Nfpa Style 7 Slc Using An Isolating Device - Honeywell Notifier AFP-100 Wiring Manual

SLC Circuits with Isolators

5.6 NFPA Style 7 SLC Using an Isolating Device

Style 7 operation requires using a combination of isolator detector bases and isolator modules or isolator modules before and after a non-
isolator device. Flanking each device with an isolator provides fault protection to all other devices on the loop.
• T-tapping is NOT allowed within the Style 7 wiring configuration.
• When a non-isolator base or pull station is used, install isolator modules on both sides of devices.
• When an isolator base is used in conjunction with an isolator module, install the isolator module as shown in
Figure 10.3.
• There must be a close-nipple connection between a device and the isolator bases or modules that protect it.
32
Isolator
Module
Addressable
Detector
Isolator
Module
The first isolator module on SLC Out and SLC Return is optional
for NFS-320, NFS2-640, NFS2-3030, NFS-640, NFS-3030, AFP-
300, and AFP-400 because the panels provide the functionality.
Isolator
Module
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.
NOTE: See Figure 10.3, "Wiring a B224BI Isolator Base Mounting Plate" on page 51.
Isolator
Module
Two-wire Isolator
Detector
SLC Out
Figure 5.7 NFPA Style 7 SLC
Notifier SLC Wiring Manual — P/N 51253:U5 12/20/2017
NFPA Style 7 SLC Using an Isolating Device
Isolator
Module
Addressable
Pull Station
Isolator
Module
Isolator
Module
SLC Return
Control Panel