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5.3
Appendix 3 – Battery Standby Calculation Chart
Use the following charts and associated notes to calculate the size of the batteries required to
ensure operation of the installation in the event of AC Mains power failure. This chart is applicable to
all panels except :HS-5100N, HS-5200N and HS-5400N
17
.
Quiescent
Load
Fire
Alarm
Load
Equipment
I (A)
x
Total
I (A)
x
Total
Chassis
0.072
1.0
=
0.072
0.125
1.0
=
0.125
Loop Driver
Loop 1
0.042 1.0 =
0.042 1.0
=
Sensor / Loop Current
18
1.25
19
=
1.25 =
Loop Driver
Loop 2
20
0.042 1.0 =
0.042 1.0
=
Sensor / Loop Current
1.25
=
1.25
=
Loop Driver
Loop 3
20
21
0.042 1.0 =
0.042 1.0
=
Sensor / Loop Current
1.25
=
1.25
=
Loop Driver
Loop 4
20
21
0.042 1.0 =
0.042 1.0
=
Sensor / Loop Current
1.25
=
1.25
=
Mxp-503 AdNeT Network Card
0.020
1.0
=
0.020
1.0
=
Mxp-509 AdNeT PLUS Network Card
0.043
1.0
=
0.043
1.0
=
Mxp-513 LED Indicator
0.008
=
0.030
22
=
Mxp-507 2-Way Relay Card
0.000
1.0
0.000
0.030
22
1.0 =
Mxp-532 Routing Interface
0.031
1.0
=
0.043
22
1.0 =
Mxp-504 VdS Interface
0.025
1.0
=
0.034
22 23
1.0 =
Mxp-504 VdS Interface Supply Outputs
1.0
=
1.0
=
Auxiliary Supply Output
24
1.0
=
1.0
=
Sounder Output A
1.0
=
Sounder Output B
1.0
=
Sounder Output C
20
21
1.0
=
Sounder Output D
20
21
1.0
=
Total
Quiescent Load
=
Alarm Load
=
x 24 hr =
Ahr
x 48 hr =
Ahr
x 72 hr =
Ahr
x 2
25
x 0.5 hr =
Ahr
Ä
(carry forward)
+
Ahr
Total Load (Qui Alarm) =
Ahr
x 1.25
25
(Battery De-rating factor) =
Ahr
17
See Nittan protocol addendum for the battery calculation when using the Nittan protocol since the loop voltage is different to other protocols.
18
Use the detector manufacturers’ technical information to calculate the load on the loop for both the quiescent condition and fire alarm
condition for all loop devices. By default, a maximum of 5 detector / call point LED indicators will be turned on in a fire alarm condition. (This
number can be changed via the PC Programming Tool).
19
The calculated loop loading must be multiplied by a factor of 1.25 to calculate the actual current draw from the batteries. This is to take into
account voltage conversion and conversion efficiency in generating the supply for the loop.
20
Not available on HS-5100.
21
Not available on HS-5200.
22
Worst Case – All LEDS are ON. All Relays / Outputs are ON.
23
Does not include any supply loads for router, FAT, FBF, etc. Include these loads in the separate line.
24
Refer to separate data sheets for the additional modules that can be powered from the panel AUX Output to determine the AUX loading
currents. For example, the modules can include 4-Way Relay, 4-Way Sounder, Modem, Page, Sounder Splitter, etc. The sum of all these
additional currents should be entered in these fields. Ensure that the total alarm load does not exceed the AUX output rating.
25
The alarm load should be doubled to allow for changes in battery efficiency for loads in excess of the recommended C/20 discharge rate.
The total load calculated should be multiplied by a de-rating factor of 1.25 to allow for changes in battery efficiency over time. The above
calculation is in accordance with the recommendations in BS5839-1: 2002.
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