SilentKnight 5700 - Manual (Page 25)

Before You Begin Installing 151295
3-8
1. Total does not include isolator devices or accessory bases.
2. 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 2.5A total current
that can be drawn from the panel.
3. Use next size battery with capacity greater than required.
4. 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.
5. 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.
6. The FACP can only support 5 devices w/LED’s on. This current draw has been added to the panels alarm current.
3.6.3 Current Draw Worksheet for SD SLC Devices
Use Table 3-3 to determine current requirements during alarm/battery standby operation when SD SLC devices
are installed. (Copy the page if additional space is required).
B Auxiliary Devices Current
Notification Appliance Circuits Refer to device manual for current rating.
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. 3
Total ampere hours
required
AH
Table 3-3: Current Calculation Worksheet for SD Devices
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.
Fire Panel (Current draw from
battery)
1
Standby: 200 mA 200 mA
Alarm: 365 mA 325 mA
Addressable SLC Devices
SD500-AIM
(50 max.) 1
Standby/Alarm: .30 mA 5
mA mA
SD500-MIM mA mA
SD500-ARM mA mA
SD500-PS/SD500-PSDA mA mA
SD505-AIS
SD505-AHS mA mA
SD505-APS mA mA
Table 3-2: Current Calculation Worksheet for SK Devices
Device
# of
Devices
Current per Device
Standby
Current
Alarm
Current