Model SK-4224 Fire Alarm Control Panel Installation/Operation Manual
3-4
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3.4
Electrical Specifications
Note: * When ordering, specify your voltage requirements.
3.5
Environmental Specifications
It is important to protect the SK-4224 control panel from water. To prevent water damage, the
following conditions should be AVOIDED when mounting the units:
•
Do not mount directly on exterior walls, especially masonry walls (condensation)
•
Do not mount directly on exterior walls below grade (condensation)
•
Protect from plumbing leaks
•
Protect from splash caused by sprinkler system inspection ports
•
Do not mount in areas with humidity-generating equipment (such as dryers, production
machinery)
Table 3-3: Electrical Specifications
Circuit
Rating
Primary AC
*120 Vrms at 60 Hz, or 230 Vrms at 50 Hz
@ 1.5 amps
Total External DC Load
2.5A @ 24 VDC
+24V Auxiliary Power
19.8 V to 28.0 V, 0.5 A max.
Trouble & Alarm Relays
2.5 A @ 30 VDC resistive
Notification Appliance Power
19.8 V to 28.0 V, 2.5 A max.
Smoke Detector Power
19.8 V to 28.0 V, 1.0 A max.
Battery Charging Voltage
27.0 - 27.6 V
Maximum Battery Charging Current
750 mA
Minimum Low Battery Detect
20.4 V
Minimum Low AC Detect
100 Vrms at 60 Hz, full load
Table 3-4: Environmental Specifications
Storage Temperature:
-4° - 167° F (-20° - 75 ° C)
Operating Temperature:
32° - 120° F (0° - 49 ° C)
Humidity:
10 - 85% non-condensing
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