The four zone SK-4/E is a 24 VDC
FACP that 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 such as two- and four-wire
smoke detectors, pull stations,
waterflow 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.
Features
• Four Style B (Class B) initiating device circuits (IDCs)
• Two Style Y (Class B) notification appliance circuit (NAC)
• Optional module converts all IDCs and NACs to Class A (PN SK-CAC4)
• Support for synchronization of standard ANSI audible signals and ADA compliant strobes per NFPA 72
• Selectable for System Sensor, Wheelock, and Gentex protocols
• Selective silence feature allows manual silence of horns while strobes continue to flash on the same NAC
• Program for combination tamper supervisory monitor and waterflow alarm on one zone
• Silent or audible walk test operation mode
• Alarm verification selectable per zone
• Program each zone for supervisory or fire with separate red and yellow LEDs
• Disable switches provided per zone
• Program NACS for
– Silence inhibit
– Auto silence
– Strobe synchronization
– Temporal or steady signal
– Silenceable or nonsilenceable
– Disable
• Form C alarm, trouble, and supervisory relays
• 3A total usable current
• 6A total usable current with optional
second transformer (PN SK-TRM24 or SK-TRM24E)
• Optional dress panel (PN SK-DP2/4)