Silent Knight by Honeywell SK-4 - four zone SK-4/E is a 24 VDC FACP which provides four Class B initiating device circuits and two Class B notification appliance circuit (NAC). The SK-4/E NAC protocol includes the ability to silence audible devices while strobes continue to flash, using only a single pair of wires. The SK-4/E is also compatible with conventional input devices like two- and four-wire smoke detectors, pull stations, water flow devices, tamper switches and other normally-open contact devices. Activation of a compatible smoke detector or any normally-open fire alarm initiating device activates audible and visual signaling devices, illuminates an indicating LED, sounds the piezo sounder at the FACP, activates the FACP alarm relay, and operates an optional module used to notify a remote station or initiate an auxiliary control function.
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