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Silent Knight SK4 4 zone Fire Alarm Control Panel
Silent Knight SK4 4 zone Fire Alarm Control Panel

Our Price: $367.95

Availability: IN STOCK: Ships out same day or within 24 hours
Product Code: SIL-SK4


Silent Knight SK4 4 zone Fire Alarm Control Panel

The SIL-SK4 is a 4 zone Fire Alarm Control Panel that is compatible with devices such as two or four wire smoke detectors pull stations or any other normally open contacts.

Upon activation of any compatible smoke detector or any normally-open compatible fire device; the panel can activate strobes, light up an LED to alert you, sound the sounder at the panel, and also activate a communications device to notify a remote monitoring station. This panel is also compatible with the new System Sensor i3 devices which have many features to help keep your system operating smoothly.

It also features NAC protocol which means that sounders can be silenced, but the strobes will still function and this all through the use of a single pair of wires.


SK-4 Primary AC: 120 VAC @ 50/60
Hz, 2.3A
Wiring: 14 AWG (2.0 mm2) with 600 V
insulation min

Initiating Device Circuits (IDCs)
Operating Voltage: 22 VDC nominal;
Standby Current: 4 mA
Alarm Current: 15 mA min
Short-circuit Current: 40 mA max
Loop Resistance: 100 max
EOL Resistor: 4.7K , 1/2 watt

Signaling Current: 2.5A @ 24 VDC
with standard transformer or 5A
total (2.5A per NAC) with additional
optional transformer, power-limited
EOL Resistor: 4.7K , 1/2 watt

Form C Relays
Types: Trouble, alarm, and
Contact Ratings: 2A@ 30 VAC,

Auxiliary Output
Resettable and non-resettable
Operating Voltage: 24 VDC nominal
Current: 500 mA max, power-limited;
total current for nonresettable power,
resettable power and two NACs must
not exceed 6.0A (requires additional

  • 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
    Alarm verification selectable per zone
    Program each zone for supervisory or
    fire with separate red and yellow
    Disable switches provided per zone
    Program NACS for
    Silence inhibit
    Auto silence
    Strobe synchronization
    Temporal or steady signal
    Silenceable or nonsilenceable
    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)

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