66
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: 5100N,
5200N and 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
21
0.042
1.0
=
0.042
1.0
=
Sensor / Loop Current
1.25
=
1.25
=
Loop Driver
Loop 4
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
1.0
=
Mxp-532 Routing Interface
0.031
1.0
=
0.043
1.0
=
Mxp-504 VdS Interface
0.025
1.0
=
0.034
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
1.0
=
Sounder Output D
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
(carry forward)
+
Ahr
Total Load (Qui Alarm) =
Ahr
x 1.25
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 Mx-5100.
21
Not available on Mx-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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