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Posted

Hi folks,

 

What size battery would I need for the above Panel?

 

What Texecom smoke detector would you recommend for use in a house?

 

What surface mount door contacts are compatable with this panel?

 

Thanks in advance  ;D

 

Chris

Posted

Chris

Your battery needs to be sized based on the load. There are minumum requirements re standby time depending on the version of the regs your using, ie older BS4737 or newer BS EN 50131

 

re smoke detector any of the texecom unit will work fine but personally id use a menvier M12 unit as its 3 sensors in one and can be programmed at the sensor to detect as required, ie heat / smoke / rate of rise or a combination of those.

 

Door contacts

You can use any normal double pole contact and fit eol resistors or use a contact with built in resistors ie the elmdene / knight graded units.

Posted

Thanks for that.

 

Regarding the battery, can you advise what size based on the following.

 

5 (possibly 6) DT PIR's

2 Prox Keypads

2 Smoke Detectors

2 Door Contacts

 

This is a private install, so not fussed about regs, but would like to have sufficent standby time to cover regs anyway (whatever gives the best times I suppose) :-)

 

Thanks,

 

Chris

Posted

The only way to be 100% is to measure the current as installed.

You can make make a rough calculation from the manufactures supplied specs so

 

generic pir (is215) = 16mA

Prox keypad (Texecom premier) = 90mA

Smoke detector (Menvier M12) = 1mA

Door contacts wont use any current

Panel (texecom premier) = 70mA

SAB (AG6) = 35mA

 

Totals

Pirs 6x16 =  96mA

Keypads 2 x90 = 180mA

smoke = 2x1 = 2mA

Panel = 70mA

SAB = 35mA

total = 383mA

 

WOrking it out the BS4737 way (8 hours standby + 30mins alarm) =

383 x 8 = 3064mA

I would add a 10% margin to allow for battery aging 3064 + 306mA = 3370mA

 

There isnt a battery that size so id use a 7A/h battery (7000mA/h) that would give approx 15 hours standby time.

Obviously these are calculated values and you need to confirm them with a meter.

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