Tyco 4100U-S1 - Manual (Page 131)

H-1
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 AS1670.1 Section 8.2.3 for a definition of the loads to be calculated.
Battery capacity requirements are specified in AS1670.1, 2004, Section 3.16.4
with an example shown in Appendix C1.
To calculate the necessary capacity for the 4100U-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 4100U-S1 cabinet can accommodate 2 x 40Ahr
batteries.
The following batteries are compatible with the 4100U-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
Appendix H
Power Supply & Battery Capacity Calculations
Power Supply
Battery Capacity