Silent Knight SD500-LIM Line Isolator Module
SD500-LIM line isolator modules are compatible with 
Honeywell Silent Knight® fire alarm control panels (FACPs). 
SD500-LIM line isolator modules can be used on Style 7 (Class A) 
and Style 4 (Class B) wiring configurations. SD500-LIM line 
isolator modules can isolate a short circuit wiring fault on an SLC loop. 
Normally if a short on the SLC loop occurs, communication on the loop can be disrupted. 
When isolator modules are used and a short occurs on the SLC loop, it will be detected 
as a trouble but all the SLC devices that are protected by a line isolator module will continue to operate. 
SD500-LIM line isolator modules mount in a standard dual gang or 4 inch square electrical box.
Features
    - Isolates short circuits on an SLC loop
 - Protects other modules on the loop so other devices continue to operate
 - Can be used on Style 7 (Class A) and Style 4 (Class B) wiring configurations
 - Mounts in a standard dual gang or 4 inch square electrical box
 
Certifications
    - UL Listed
 - CSFM
 - MEA 429-92-E, Vol 9
 - FM Approved