I3 on a PARADOX security system?

    Hi,

    Idea is that I would like to put i3 on a old PARADOX security system that basically has 3 sensors that are directly connected to the main system with cable.

    i guess the sensor sends the signal to the box via the cable.

    i would basically connect the 3 lines to 3 output cables from the sensors and see if the i3 would detect the change and report so i could expand the security system form just a local alarm to alert to be able to receive the notifications via home assistant.

    could this work??

    any way i will try it at some point and report the results, but u guess it all boils down to the type of the signal the sensors send and the level of the current

    I also want to use a i3 as an alarm system interface but there is a restriction with the i3. This issue is that the its voltage range is 24-60VDC but the paradox systems runs on 12V. A solution to powering the i3 is to use a step up module like this from eBay:

    MT3608 DC-DC Step-Up Converter Booster Power Supply Boost Board

    12V in / 24V out.

    But I'm not sure how the i3 will interface with the PIR zones.

    Let me know if anyone has more info on the i3 trigger inputs.

    Glenn

    With some skills in electronics (or with a friend who owns this knowledge) it would be possible to supply a Shelly i3 with 12V DC:

    Thema

    Shelly i3 Stromversorgung mit 5V bis 12V DC

    Ich nutze schon länger einen Wemos D1 der Funksignale in Tastenbefehle an den i3 weitergibt.

    Bisher kl. 12V Steckernetzteil dran, 5V DC für den Wemos und über Stepup 24V DC für den i3.

    Den Stepup Regler kann man einsparen (spart Energie) ;)

    Der i3 hat einen SM7035 Schaltregler für 24V DC bzw. bis 230V und erzeugt 12V DC daraus.

    Den habe ich deaktiviert und der i3 kann jetzt über 5V bis 12V DC über den + Eingang versorgt werden.

    Den SM7035 sollte man auf jeden Fall umgehen, der spinnt evtl. wegen zu…
    DIYROLLY
    12. November 2021 um 18:23

    Could imagine to send you such a modified part - please send PM if interested…

    „Habt Geduld. Alle Dinge sind schwierig, bevor sie einfach werden!“ (aus Frankreich)

    „Nothing in life is to be feared, it is only to be understood.“ (Marie Curie, 1867-1934)

    „Es reicht nicht“, rief Schiller, „Gedankenfreiheit zu fordern, man muß auch denken können, sonst fordert man Gedankenlosigkeitsfreiheit und die ist die Freiheit zur Dummheit, welche wiederum die schlimmste Unfreiheit überhaupt ist!“
    (Aus „Besuch aus Weimar“ von Gert Heidenreich, Schriftsteller, *1944 in Eberswalde)

    Paradox wired systems work with change in resistance. Usually there are resistors in the sensor and if everything is ok the resistance on the signal cable is constant. At any event the resistance is changed. For the tampering alarm I think the state is infinite resistance, but I'm not sure about that. If you have full control over the security system you can check inside the sensor. BUT if you open the sensor when the system is with power, it will trigger the tamper alarm no mather if it's armed or not.

    Usually the resistance is around 200k-400k. There are installation guides that are proposing the usually used values, but I think the main reason for this approach is to be flexible and be able to use your own values during the programming state.

    Most Paradox systems have programmable PGMs, so if you have programming access you can use them. This way you can have separate power supply, which is the best ways when you connect to a security system.