Honeywell Fire-Lite Alarms MS-9600UDLS - NFPA Class X SLC Using Isolator Modules

FireLite SLC Wiring Manual — P/N 51309:R3 7/29/2019 27
NFPA Class X SLC Using Isolator Modules SLC Circuits with Isolators
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).
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Figure 4.6 NFPA Class X SLC Using Isolator Modules
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