relay question

Bit of trouble understanding your question.

1) Do you mean that the battery is 12V 7.2Ah (amp-hours)?

2) Do you really mean "is it possible for the unit to send any data signal if your back up battery is dead for 15 minutes?" ? If so, where is the energy expected to come from?

A bit more effort put into communicating well with others might help encourage others to communicate with you.

I think I know what is being asked here so I'll hold back on my temptation to tease and attempt to answer the implied question.

Using an over sized 12V 7.2 AH battery for an alarm backup can permit the alarm system to still broadcast a status or alarm signal fifteen minutes after dropping below the low battery alarm level. One should not rely on this happening but it is plausible to happen and here is how.

Say you had an alarm system that was designed to operate with an battery backup designed to work with say eight AA alkaline batteries for five minutes after AC power loss. I as the system hardware designer would design this system to transmit an alarm signal to a monitoring station if AC power was missing, and the battery status was reporting low but not quite dead yet. Expecting this to be a final transmission I would not differentiate a failing battery status from a dead battery status. Now suppose that this alarm system was installed in a location with a poor power distribution system. The backup battery source might be replaced with a beefier 12V 7.2 AH sealed lead acid battery. In this scenario, fifteen minutes after detecting a low battery level and no AC power the alarm system's 15 minute watchdog status timer may still be capable of reporting "no power".

stop pretending your good defenitely your not one from our club 12V 7.2 ah is not over size its an issued standard. and guest what you did'nt answer the question if u had a brain this is the right answer i can send a signal for a general alarm via.... using a voltage drop ...... and a timing........ try to guess ?!!:)

im sorry but icant help it.. you really should not under estimate a question the answer is eating u on your face redfred your off topic considering the other reply its quite good but your answer "men try reading some books it might help..."let me try and see how good you are say the battery drops to 6 Volts,6 volts can still operate a relay right! but data will not be transmitted, only a general alarm can be send ..remember its 12v and power consumption on a 12 vDC will reduce the battery power substancially thus putting it down to 6 so if i reach that 6 volts .... take a guest. mind and read the question please.. and implying to use what an AA battery?

and by the way one guest said it right 12 volts is not over size .

What I understand is as follows:

There is a Alarm panel .This can record all the intrusion events and store the events.

This panel works on battery of capacity 12 Volts 7.2 Ah.

Normally the data can be retrieved from the panel.

The query is after the battery is drained can the data be retrieved or can the date be transferred to the master unit.

The answer is No.

Tim Hawley Master Mech.

The Intruder alarm uses a closed loop security circuit and an electronic circuit board which is powered by a 12V dc battery. There is a recharge circuit that charges the battery using a 120Vac source.

As long as the closed loop security circuit remains closed the lamp, siren etc.. remains off and the battery should last for a few days depending on the age of the battery. A battery replacement every 5 years may be required.

Most security systems will send a battery low signal to your security monitoring provider. If you do not have this capability it is time for an upgrade.

Best Regards,

Tim

the answer was yes and it work properly thanks "guest".