Nfpa Class X Slc Using Isolator Modules - Honeywell Fire-Lite Alarms MS-9200 Wiring Manual

NFPA Class X SLC Using Isolator Modules

4.4 NFPA Class X SLC Using Isolator Modules
Class X operation requires using isolator modules (or a combination of isolator modules and isolator bases) before and after each device.
Flanking each device with an isolator provides fault protection to all other devices on the loop.
• T-tapping is NOT allowed within the Class X wiring configuration.
• When a detector base or pull station is used, install isolator modules on both sides of the device.
• Connections between isolator modules and the device they isolate must be "close-nippled" conduit, within 3 feet (91.44 cm).
3
Isolator
Module
3
Isolator
Module
3
Isolator
Module
FireLite SLC Wiring Manual — P/N 51309:R3 7/29/2019
1 3
Isolator
Module
4
Two-Wire
Addressable
Detector
4
4
SLC Out
Figure 4.6 NFPA Class X SLC Using Isolator Modules
1 3
Isolator
Module
Two-wire
Addressable
Detector
SLC Return
Control Panel
SLC Circuits with Isolators
2 1
Isolator
Module
Addressable
Pull Station
2 1
Isolator
Module
2 1
Isolator
Module
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