Silent Knight 005815XL Signal Line Circuit Expander for IntelliKnight 5820XL Addressable Fire Control Panel

Expand and future-proof your fire alarm and life-safety system with the Silent Knight by Honeywell 005815XL Signal Line Circuit (SLC) Expander. This control panel module increases addressable device capacity—adding up to 127 devices per SLC and allowing up to three expanders for a 508-device system—so you can scale monitoring and security coverage across commercial buildings, campuses, or multi-tenant facilities without costly panel replacements. The 5815XL supports the same IntelliKnight device set and SLC features (including Style 6/Class A) for seamless integration and predictable performance.

Designed for easy installation, the module connects via the RS-485 bus and mounts in IntelliKnight 5820XL/5895XL cabinets, making it ideal for retrofits using standard wiring. Built to industry standards (UL 864, NFPA 72) and backed by a 3-year warranty, the 005815XL delivers dependable supervision for fire alarm, security, and monitoring applications. Upgrade your IntelliKnight system to accommodate growth and enhance surveillance and emergency response—contact sales or add the 5815XL expander to your spec today.

• Add up to 127 addressable devices per SLC, enabling seamless system expansion without replacing the main panel
• Scale to 508 devices by installing up to three expanders for large facilities and campus deployments
• Preserves full IntelliKnight SLC functionality and device compatibility for consistent monitoring and supervision
• RS-485 connectivity and cabinet mounting simplify installation and retrofit projects, reducing labor and downtime
• UL 864/NFPA-compliant design with LED communication indicator and 3-year warranty for reliable, code-compliant operation