Part of the system design includes calculating that the quiescent load and the alarm load
are each less than the rating of the power supply.
Note that the quiescent load includes devices such as door holders that are normally
energized, but get switched off during alarm.
The SPS rating is included in the specifications in Chapter 6.
Note that the system current for both the quiescent and the alarm state can be viewed on
the front panel by use of the System Current status point under Card Status for the SPS.
Refer to AS 1670.1 Section 8.2.3 for a definition of the loads to be calculated.
Battery capacity requirements are specified in AS 1670.1, 2004, Section 3.16.4 with an
example shown in Appendix C1.
To calculate the necessary capacity for the 4100ES-S1 system:
Fill out the table on the next page with the quantities of each type of module or
device.
For each device, calculate the standby current and alarm current.
Sum the standby and alarm columns to get the total standby current (I(S)) and alarm
current (I(A)).
Calculate the required battery capacity from this equation:
Battery Capacity (Ahr) = (I(S) x 24 + 0.5 x I(A)) x 1.2
Note: I(A) allows for two zones in Alarm (including Ancillary loads).
The factor of 1.2 in Battery Capacity equation allows for battery efficiency
reduction.
Take the calculated value of Battery Capacity and choose the next largest standard size of
battery. The 4100ES-S1 cabinet can accommodate 2 x 40Ahr batteries.
The following batteries are compatible with the 4100ES-S1.
Power Sonic PS12 Series
Century Power Sonic PS12 series
Sonnenschein A200 Series
Sonnenschein A300 Series
Century Yuasa NP Series
Auscell CJ12 series
Power Block PB12 series
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