Home Forums System Recommendations, System Design New Install (DSC) Siren and Power Help

This topic contains 10 replies, has 4 voices, and was last updated by  Peiloy 1 year, 4 months ago.

Viewing 11 posts - 1 through 11 (of 11 total)
  • Author
    Posts
  • #17396

    Peiloy
    Participant

    I am getting ready to order a DSC1864. I want to have an indoor and outdoor siren but I am concerned about the maximum current output of the alarm. The sirens are:Indoor: SD15W: 350mAOutdoor: ELK150RT: 1.2 Amps or 700 mA on Millimiser.I know that the panel is rated 700mA continuous or 2A for a short period.If I use both sirens how long will this short term be, and what will happen after this time elapses? Also should I use the millimiser setting? I assume that this means that the siren will not be as loud.Lastly this will be mostly wireless sensors, but I will have some wired ones. Do I have to add the current draw of the sensors to the sirens? If not what is the maximum draw allowed for the sensors?Thanks for the help!

    #72493

    piepie
    Member

    The 2 amps is provided mostly by the battery, with some help when it has AC power. In a power outage the battery provides all power.
    So
    You have a 1.5 amp draw when both are running at full power
    I assume you are using a 4AH 12v SLA battery.
    4ah/1.5amp draw= 2.6666 Hours
    Of course there will be other current draw so you should expect 2 hours of siren run time. Most people program their system to have a 10-20minute siren cutoff so you should be fine with your current setup.

    #72497

    DEL Installations
    Participant

    Pie,

    You calcs and assesment of current draw is not true. Be careful with what you're putting out there.

    A panel with a 4aH battery will not run for 4 hours at 1A current draw…there's far more complex values to throw out there. Also, I'd shoot someone if they had their bell timeouts at 10-20 minutes.

    #72509

    Peiloy
    Participant

    I was thinking of putting the siren timeout somewhere between 4-6 mins. Will I be ok with a 4 Ah battery? Also what will happen if the battery dies before that time is up?

    #72539

    Peiloy
    Participant

    Also I am thinking of incorporating this heat sensor for my kitchen. http://www.systemsensor.com/products/conv/?UniqueID=140

    I think that it draws 1 amp but I am not sure. I am guessing that the panel will not have enough power for it, so is there a way to use it at all?

    I would have gone wireless, but since its in my kitchen I need a heat only sensor as I think smoke would be aa problem and DSC does not seem to make heat only sensors. If I am thinking of this in a wrong way please let me know.

    #72543

    dilligaff
    Participant

    The sys sensor heat det is a mechanical device and draws no current. Connect it to a zone programmed as type 08 and install a 5.6K eol at the detector.

    #72558

    Peiloy
    Participant

    Thanks Dilligaff. One more question on this heat sensor. I thought that it would have to wire to a PGM contact so that in case it trips I would be able to reset it? Am I wrong in thinking this?

    #72563

    dilligaff
    Participant

    The reset for the heat detector depends on the detector. Fixed temp heat detectors can be resettable or 1 shot devices which after being tripped once must be replaced. The heat detector That you are thinking or using is a 1 shot device. After the detector trips it will have to be replaced.

    Heat detectors are mechanical devices that require no power for device operation and can be installed on a zone of your panel

    Smoke detectors require power for operation and are re-settable by removing power after the smoke clears. The purpose of using PGM2 for smoke detectors is to provide both power and a way to interrupt power to reset the smoke detector using 2 wire detectors. If you use 4 wire detectors you would use PGM 2 programmed as as smoke power reset for power and connect the smoke detector contacts to a panel zone programmed as type 08 and use a 5.6K eolr.

    #72564

    Peiloy
    Participant

    Ahh that makes sense now.  So if I were to use a two wire smoke and PGM2, would PGM2 also monitor or is it solely for reset and power? If a two wire cannot be monitored then wouldn't a four wire be a better option?

    #72588

    dilligaff
    Participant

    PGM2 can do either resettable power for 4 wire smoke det with the smoke det tripping panel zones or 2 wire smoke det which get their power from PGM2 and trip the system fire zone by PGM2 and are supervised by PGM2.

    #72633

    Peiloy
    Participant

    Thanks Dilligaff!

Viewing 11 posts - 1 through 11 (of 11 total)

You must be logged in to reply to this topic.