14
GWF-7075 Manual —
LS10147-002GF-E:G 10/5/2022
Prerequisites for Installation
Calculating Current Draw and Standby Battery
3.5 Calculating Current Draw and Standby Battery
This section contains instructions and tables for calculating current draws and standby battery needs.
3.5.1 Worksheet Requirements
The following steps must be taken when determining current draw and standby battery requirements.
Filling in the Current Draw Worksheet, Table 3.2
1.
For the GWF-7075, the worst case current draw is listed for the panel, addressable devices, and SLC expanders. Fill in the number of
addressable devices and expanders that will be used in the system and compute the current draw requirements for alarm and standby.
2.
Add up the current draw for all auxiliary devices and record in the table at Line B.
3.
Add up all notification appliance loads and record in the table at Line C.
4.
For notification appliances and auxiliary devices not mentioned in the manual, refer to the device manual for the current ratings.
5.
Make sure that the total alarm current calculated, including current for the panel itself, does not exceed
2.5
A. This is the maximum
alarm current allowable.
If the current is above
2.5
A, you will need to use a notification power expander(s) such as, the GFPS-6S NAC Expander. Use the
expander(s) to distribute the power loads, so that the GWF-7075 or the power expanders do not exceed their power rating.
Refer to the Current Draw Worksheets provided with the
GFPS-6S Manual
to identify the ratings that do not exceed their power
requirements.
6.
Complete the remaining instructions in the table for determining battery size requirements.
3.5.2 Current Draw Worksheet for Velociti SLC Devices
Use Table 3.2 to determine the current requirements during the alarm/battery standby operation when Velociti SLC devices are installed. You
can install up to 75 Velociti detectors
and
75 Velociti modules.
Terminal Block 2 SBUS
–
SBUS Power
27.4 VDC
0.5 A
+
A
SBUS Communication
5 VDC
100 mA
B
NAC1
1
–
Notification Appliance Circuit/Auxiliary power
27.4 VDC
1 Amp NAC or Aux power
+
NAC2
–
Notification Appliance Circuit/Auxiliary power
27.4 VDC
1 Amp NAC or Aux power
+
P8
EXT. Comm
Cellular
Connection
B
Cellular Transmitter
input
A
S+
55 mA, 95 mA
S-
1
Regulated NAC application. When programmed for Releasing, the NACs are Special Application.
Terminal No.
Label
Description
Rating
Group
Individual
Voltage
Current
Table 3.1 Terminal Descriptions and Electrical Specifications (Continued)
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
165 mA
165 mA
Alarm:
310 mA
310 mA
1
Addressable SLC Detectors
ASD-PL2F
Standby:
0.3 mA
Alarm:
6.5 mA
mA
mA
ASD-PTL2F
mA
mA
ASD-PL2FR
mA
mA
ATD-L2F
mA
mA
ATD-HL2F
mA
mA
ATD-RL2F
mA
mA
MCS-ACCLIMATE2F
mA
mA
Table 3.2 Current Draw Worksheet for IDP SLC Devices
Содержание Honeywell GWF-7075
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