Brooks Firetracker FT420, Technical Manual

Page: 56 / 78

Technical Manual
FT420
– Iss 2.4
56
Table 37 Current Consumption of Typical CIE Configurations
16
CIE
Expansion Board Quantity
Expansion
Display Qty I
Q
(mA)
I
act
(mA)
Required
Back up
(AH)
Recom.
Battery
Capacity
(AH)
Zone
Superv.
Output
Dry Contact
Relay
Zone OWS
Basic 4 Zone 0 0 0 0 0 90 231 2.85 7
Basic 12 Zone 1 0 0 2 0 164 307.2 5.11 7
Basic 20 Zone 2 0 0 4 0 238 383.4 7.38 12
4 Zone + 60W OWS 0 0 0 0 1 209 3249 8.30 12
8 Zone + 60W OWS 1 0 0 1 1 282 3324 10.54 12
8 Zone + 120W OWS 1 0 0 1 1 283 5524 11.94 12
12 Zone + 60W OWS 1 0 0 2 1 283 3326 10.57 12
12 Zone + 120W OWS 1 0 0 2 1 284 5526 11.98 12
20 Zone + 60W OWS 2 0 0 4 1 357 3403 12.84 17
20 Zone + 120W OWS 2 0 0 4 1 358 5603 14.24 17
To calculate the total system current, alarm current
I
act
and quiescent current
I
Q
shown in Table 36 and
Table 37 were used. The battery capacity of a basic 4 zone FT420 CIE complete with 60W OWS is
shown in Table 37 as an example.
Table 38 is a screenshot of the FT420 Current Calculation Spread Sheet.
Table 38 Battery calculation example
FT420 CIE Battery Calculations Rev 2.4 Date
26-Oct-18
Project:
mA Total mA mA Total mA
FT420 Basic 4 Zone CIE FT420-4 1 90.0 90.0 231.0 231.0 No. of units must = 1 (4 Zones)
8 Zone Expansion Board SUB883 0 72.0 0.0 73.0 0.0 Max. No. of Units 2 (16 Zone)
4 Zone Display Board SUB891 0 1.0 0.0 2.1 0.0 Add 1 for every 4 zones, max. 4
8 Relay Expansion Board SUB885 0 14.0 0.0 138.0 0.0 Max. No. of Units 3
4 Supervised Output expansion Board SUB886 0 14.0 0.0 54.0 0.0 Max. No. of Units 6
Basic OWS SUB891 1 18.0 18.0 18.0 18.0 Max. No. of Units 1
Add 60 W Amplifier Module SUB865 1 40.0 40.0 2750.0 2750.0 Max. 1 unit, current @27.5
Is BGM enabled? (1=Yes/0=No) 0 65.0 0.0 0.0 0.0
Add 8 Tone Selection Control/Display Board
SUB891 0
1.0 0.0 17.0 0.0
Maximum No. of Units 1
Number of expansion boards 0
Number of display boards 1
Warning System Output 0.0 0.0
ACF Output 0.0 0.0
External Strobe Output 0.0 0.0
24 V for Routing Equipment 0.0 0.0
C.I.E. current consumption. (mA)
148.0
2999.0
Standby Time (hours) 24
Alarm Time (minutes) 30
Battery Requirement (in AH) 8.1888
Nearest Standard Battery Size (A/h)
12
Comments System Components
No. of
Units
Stock Number
Quiescent Current Alarm Current
16
Other combinations can be calculated using the spread sheet or the equations shown in this Chapter.