Silent Knight SD500-LIM Line Isolator Module – SLC Loop Short Circuit Protection

Description

The Silent Knight SD500-LIM Line Isolator Module is a crucial component in maintaining the integrity and functionality of your fire alarm system. Designed to detect and isolate short circuits on Signaling Line Circuits (SLC), the SD500-LIM ensures that a single fault does not compromise the entire communication loop.

Fully compatible with Honeywell Silent Knight® addressable fire alarm control panels, this module protects connected devices by isolating the affected segment of the loop in the event of a wiring fault. As a result, all other SLC devices continue to function without interruption—ensuring critical life safety systems stay online during emergencies.

Ideal for use in both Style 4 (Class B) and Style 7 (Class A) wiring configurations, the SD500-LIM installs easily into standard dual gang or 4-inch square electrical boxes. This makes it a flexible solution for new installations and retrofits alike.

Key Features:

• Short Circuit Isolation: Automatically detects and isolates SLC loop faults
• System Integrity: Ensures unaffected devices on the loop remain operational
• Dual Wiring Compatibility: Works with both Class A and Class B configurations
• Easy Installation: Mounts in standard dual gang or 4″ square boxes
• Reduced Downtime: Minimizes system disruption during wiring faults
• Trouble Notification: Faults are reported without disabling the loop

Typical Applications:

• Commercial and Office Buildings: Maintain continuous protection in large installations
• Educational Campuses: Minimize system downtime across multiple zones
• Healthcare Facilities: Ensure uninterrupted operation in critical areas
• Industrial Sites: Increase survivability and reliability of life safety systems

Certifications:
UL Listed | CSFM Approved | MEA 429-92-E Vol. 9 | FM Approved

Whether you’re installing a new fire detection system or upgrading an existing one, the Silent Knight SD500-LIM Line Isolator Module enhances the resilience and performance of your addressable SLC loop.