Siterwell GS690, Installation And Service Manual

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Document NO.: RD-690-39-001 Version: A Date
：
2017.12.30
(Do not exceed 100
ohms)
4,875 (1,480 m)
3,225 (975 m)
14 AWG Belden 9581
WPW995
16 AWG Belden 9575
WPW991
18 AWG Belden 9574
WPW975
28 VDC
resettable,
Non-resettable
Connects to
Annunciators and
other accessories
No more than 1.2
volt drop
allowed from supply
source
to end of any
branch
Distance limitation set
by 1.2 volt maximum
line drop
12 AWG - 18 AWG
9 BATTERY CALCULATION
Use the table below to calculate the total standby and alarm load for ampere hour (AH).
This total load determines the battery size (in AH), required to support the control panel under the fail of the AC Power
Supply as follows:
1. Enter the NFPA standby and alarm times (refer to NFPA requirements below).
2. Calculate the ampere-hours for standby and Alarm, and then sum the standby and alarm ampere-hours.
3. Multiply the sum by the derating factor of 1.25 to calculate the proper battery size (in AH). Minimum battery derating
factor is 20%.
4. Write the ampere hour requirements on the protected premises label located inside the cabinet door.
Standby Current(amps) Secondary Alarm Current(amps)
Device Type Qty
Current
Draw
Total Qty
Current
Draw
Total
Main Circuit Board 1 x 0.100000 = 0.100000 1 x 0.160000 = 0.160000
Loop Board 2 x 0.040000 = 0.08 2 x 0.070000 = 0.14
Addressable Devices
GS620 0 x 0.000200 = 0 0 x 0.000400 0
GS621 0 x 0.000400 = 0 0 x 0.025000 0
GS22-A 0 x 0.000500 = 0 1 x 0.130000 0
GS623 0 x 0.000500 = 0 0 x 0.03000 0
GS650 0 x 0.000200 = 0 0 x 0.003000 0
GS670(future) 0 x 0.000200 = 0 0 x 0.003000 0
Sum each column for totals Total Standby Current 0.180000 Total Alarm Current 0.30000
Required Standby Time in Hours