Silent Knight SK-ISO Line Isolator Module

Keep your addressable fire alarm and security system online when faults occur. The Silent Knight by Honeywell SK-ISO Line Isolator Module isolates short circuits on the signaling line circuit (SLC) so the remainder of the loop continues to operate—preserving alarms, monitoring, and surveillance connectivity. Designed for IntelliKnight control panel modules, the SK-ISO is compatible with 5700, 5808, 5820XL and 5820XL-EVS panels (version 10 and higher) and operates on a 32V DC input. The module’s panel-controlled LED provides instant visual status—flashing green in normal condition and solid red in alarm—making field diagnostics faster and reducing service calls. Rated for commercial environments with an operating range from 0°C to 49°C, the SK-ISO delivers reliable isolation in demanding security and life-safety installations. Install this line isolator module to protect downstream devices, maintain continuous monitoring, and simplify maintenance of your addressable fire alarm network. Add the SK-ISO to your next control panel deployment or contact sales for system integration assistance.

• Maintains system uptime by automatically isolating short circuits on the SLC loop so other devices remain operational
• Reduces troubleshooting time with a panel-controlled LED that indicates normal (green) and alarm (solid red) status
• Seamless compatibility with IntelliKnight addressable panels (5700, 5808, 5820XL, 5820XL-EVS, v10+) for easy integration
• Automatic switching when line voltage falls below 4V protects connected modules and preserves critical monitoring functions
• Compact, rugged design rated for 32V DC input and operation from 0°C to 49°C—ideal for commercial security and life-safety environments