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Before You Begin Installing
151209 3-9
1. Total does not include isolator devices or accessory bases.
3. If using door holders, you do not need to consider door holder current for alarm/battery standby, because power is
removed during that time. However, during normal operation, door holders draw current and must be included in the
6.0A total current that can be drawn from the panel.
4. Use next size battery with capacity greater than required.
5. SK-Beam-T draws a maximum of 500mA from Auxiliary power only when the test feature is used. this should be
considered when determining auxiliary power capacity but not calculated into current requirements for day to day
operation.
6. The SK-Duct housing contains a vacant mount for a SK-Relay (sold separately). Current draw for the SK-Relay is
calculated by increasing the SK-Relay row of the calculation sheet by one for each SK-Relay used with a SK-Duct.
5865-4 LED Annunciator
(with reset and silence switches)
(8 max.)
Standby: 35 mA mA
Alarm: 145 mA mA
5865-3 LED Annunciator
Standby: 35 mA mA
Alarm: 145 mA mA
5880 I/O Module
Standby: 35 mA mA
Alarm: 200 mA mA
5883 Relay Interface (32 max.)
Standby: 0 mA mA
Alarm: 220 mA
(22 mA per relay)
mA
A Total System Current
Auxiliary Devices
3
Refer to devices manual for current rating.
Alarm/Standby: mA mA mA
Alarm/Standby: mA mA mA
Alarm/Standby: mA mA mA
Alarm/Standby: mA mA mA
B Auxiliary Devices Current
Notification Appliance Circuits Refer to device manual for current rating.
Alarm: mA
mA
Alarm: mA mA
Alarm: mA
mA
Alarm: mA
mA
C Notification Appliances Current mA
D Total current ratings of all devices in system (line A + line B + C) mA mA
E Total current ratings converted to amperes (line D x .001): A A
F Number of standby hours (24 or 60 for NFPA 72, chapter 1, 1-5.2.5): H
G Multiply lines E and F. Total standby AH AH
H Alarm sounding period in hours. (For example, 5 minutes = .0833 hours) H
I Multiply lines E and H. Total alarm AH AH
J
Add lines G and I.
4
Total ampere hours
required
AH
Device # of Devices Current per Device
Standby
Current
Alarm
Current