SK Relay Module: Commercial Fire Alarm Parts & Applications
A Silent Knight addressable relay only does its job reliably when the panel behind it is backed by a correctly sized fire alarm power supply , and that link between switching and power is where many specification and replacement mistakes begin. This guide explains what this type of relay module does, how it differs from other relay options, how power capacity affects relay-driven outputs, and what to verify before you buy or replace one in a commercial building. What an SK Relay Module Does in a Commercial System An SK relay module is an addressable device that sits on the signalling line circuit (SLC) of a Silent Knight fire alarm system. When the control panel sends a command, the module changes the state of its relay contacts. That lets the system operate equipment outside the alarm network itself: elevator recall, fan shutdown, door control and damper operation are typical examples. The SD500-ARM, a Silent Knight SK relay listed by QuickShipFire, is a useful referen...
