SilentKnight SK-5208 Conventional FACP 10-30 Zone - Manual (Page 15)

Model SK-5208 Installation Manual 151204
3-5
3.6.2 Current Draw Worksheet
Use Table 3-2 to determine current requirements during alarm/battery standby operation. (Copy the page if
additional space is required.)
* Use next size battery with capacity greater than required.
** The SK-5208 and SK-5217 limits alarm current to 95mA per zone. The SK-5208 alarm current includes
Table 3-2: Current Draw Calculations
Device # of Devices Current per Device
Standby
Current
Alarm
Current
For each device use this formula: This column X This column = Current per number of devices.
SK-5208 Fire Panel (Current draw
from battery)
1
Standby: 140 mA 140 mA
Alarm: **550 mA 550 mA
Panel Accessories
SK-5217 Zone Expander (2 max.)
Standby: 60 mA mA
Alarm: 150 mA mA
5824 Serial/Parallel Interface
Gateway Module
(1 max.)
Standby: 45 mA mA
Alarm: 45 mA mA
5220 Direct Connect
Standby: 15 mA mA
Alarm: 15 mA mA
SK-5235 Annunciator (6 max.)
Standby: 30 mA mA
Alarm: 50 mA mA
SK-5280 Status Display Module (8 max.)
Relay
(max.) Standby: 10 mA mA
Alarm: 80 mA mA
Outputs
Per output 100 mA mA
Max. 700 mA mA
A Total System Current
Smoke Detectors
Standby: mA mA
Alarm: mA mA
Standby: mA mA
Alarm: mA mA
Standby: mA mA
Alarm: mA mA
Standby: mA mA
Alarm: mA mA
B Smoke Detector Current mA mA
Notification Appliances
Alarm: mA mA
Alarm: mA mA
Alarm: mA mA
C Notification Appliances Current mA
Additional Devices
Standby: mA
Alarm: mA
Standby: mA
Alarm: mA
D Additional Devices Current mA
E Total current ratings of all devices in system (line A + line B + C +D) mA mA
F Total current ratings converted to amperes (line E x .001): A A
G Number of standby hours (24 or 60 for NFPA 72, chapter 1, 1-5.2.5): H
H Multiply lines F and G. Total standby AH AH
I Alarm sounding period in hours. (For example, 5 minutes = .0833 hours) H
J Multiply lines F and I. Total alarm AH AH
K
*Add lines H and J.
Total ampere
hours required
AH