INSTALLATION INSTRUCTIONS
Hydrosense ID Addressable Water Detection System
Document Part No. 3500039 Issue:01
Page | 21 of 32
PANEL TYPE
QUIESCENT
CURRENT
ALARM
CURRENT
Single loop panel
0.13 A
0.3 A
Two loop panel (Single Loop with Additional loop Card)
0.195 A
0.37 A
To calculate the capacity of the batteries required the following formula should be used.
(Quiescent Load (A) x 1.25) X Standby Period (hours) + ((Alarm Load x 1.75)/2) = Ah
The maximum size of battery, which can be fitted inside standard control panels, is 9 Ah (2 x PBQ 9HR-12).
Batteries above this size will need to be fitted in a separate enclosure and charged by a suitably rated battery
charger.
Any additional load connected to the system from the “Aux. 24V” Output such as additional I/O boards should be
catered for by additional capacity using the same formula as above and adding the result to the calculated
capacity required to maintain the control panel.
The current consumption of additional I/O boards is as follows:
•
16 channel I/O board - 20 mA quiescent, up to 1 A full alarm
•
8 way relay board – 10 mA quiescent, 250 mA alarm
•
6 way sounder board – 30 mA quiescent, 260 mA alarm (plus sounder load)
•
4 way conventional zone monitor board - 70 mA quiescent, 200 mA alarm (plus sounder load)
If several I/O boards need to be powered then it is likely that the standby battery capacity will be exceeded and a
separate, power supply and battery set should be installed to power these.
The standby power requirements for the loop devices should be calculated using the device technical data.
