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Thread: What is this used for?

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    Default What is this used for?

    Hi there
    I am Laura, please forgive my english poor skills...
    I have this weird old device and I am trying to understand what it is used for and how it works.
    It is written TECOM SYSTEM on it, that is why I am asking here ^^;
    On side J1, it is written (for each slot) C2 NO2 NC2 C1 NO1 NC1
    On side J2, 0V +TR -TR 12V

    Looks like there was some stuff plugged in 0V (2 wires), -TR, 12V (two wires)
    and in NO1, C1
    C1 is a tiny wire going back to 12V
    Also, there was a link between two small pin in LNK1 or LNK2, it fell down... don't know which where it was.
    I have basic knowledge, but i think this is some kind of relay. But I have no idea what's TR for.
    I put photo, easier to understand what i am saying maybe )




    Last edited by Laura@1992; 02-03-17 at 03:04 PM.



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    Yes, it's a relay, hence why it has the abbreviation RLY1 printed on the board next to it.

    It's part of an alarm, which given you've posted this in the security alarm forum, you probably already know that.

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    Thanks for the info. I did not know that. I thought it was part of a door lock or something to control a door. But can it be used in another application?
    I found the forum using the wording "TECOM door"

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    Quote Originally Posted by Laura@1992 View Post
    Thanks for the info. I did not know that. I thought it was part of a door lock or something to control a door. But can it be used in another application?
    I found the forum using the wording "TECOM door"
    Access control forms part of security systems.

    I can't see any reason why you couldn't use it for any other purpose that suits a relay of that type.

    Now that you know what it is, what do you plan on doing with it?

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    TR would be trigger

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    Quote Originally Posted by mtv View Post
    Access control forms part of security systems.

    I can't see any reason why you couldn't use it for any other purpose that suits a relay of that type.

    Now that you know what it is, what do you plan on doing with it?

    I am gonna hook it up to my breadboard and see exactly how it works now,. I am intrigued.

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    Hang around Laura we can always use another tech head around here.
    I'm out of my mind, but feel free to leave a message...

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    Quote Originally Posted by Laura@1992 View Post
    I am gonna hook it up to my breadboard and see exactly how it works now,. I am intrigued.
    should make it easier for you.

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    I was hopping it was a "delayed release timer something" (what ever how they call it), where you press a button to let the current go through and the timer act like if you were still pressing and holding the button, so that the current can still go through for a certain period of time, even if the button is not being pushed anymore. But it doesn't have anything like a variator to choose a time...
    The stuff came with an electronic lock, but that part seems dead, i can't get it to "open". it seems stuck somehow. So i am back to my breadboard and my LEDs. I will you updated!

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    Quote Originally Posted by mtv View Post
    should make it easier for you.
    it doesn't tell me what kind of relay that particular one is.
    Last edited by Laura@1992; 02-03-17 at 09:32 PM.

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    Quote Originally Posted by Laura@1992 View Post
    it doesn't tell me what kind of relay that particular one is.
    Well, you asked how it works... and the link I posted provides lots of information about how a relay works.

    You said you used a search engine to locate this forum, why can't you use one to look up the relay info?



    I'll move this thread to the "Electronics" section, which is now more relevant to the subject and leave you to your breadboard and LED's.

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    I was hopping it was a "delayed release timer something" (what ever how they call it), where you press a button to let the current go through and the timer act like if you were still pressing and holding the button, so that the current can still go through for a certain period of time, even if the button is not being pushed anymore. But it doesn't have anything like a variator to choose a time...
    The stuff came with an electronic lock, but that part seems dead, i can't get it to "open". it seems stuck somehow. So i am back to my breadboard and my LEDs. I will you updated!
    If you want to do something like that, 555 timer is your friend. Or you could go really old school with a capacitor & bleed resistor.
    Last edited by Drift; 03-03-17 at 12:15 PM.

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    Maybe this would do the trick

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    You can use that relay to control a number of things including mapping a relay output to open a door through the open collector on a tecom system, or lift control, or gate control, etc.
    It's also used for lighting control or fire alarm relays to open doors in an emergency.

    at the end of the day it's has multiple uses to tailor to the end users needs.

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    Quote Originally Posted by Laura@1992 View Post
    I was hopping it was a "delayed release timer something" (what ever how they call it), where you press a button to let the current go through and the timer act like if you were still pressing and holding the button, so that the current can still go through for a certain period of time, even if the button is not being pushed anymore. But it doesn't have anything like a variator to choose a time...
    The stuff came with an electronic lock, but that part seems dead, i can't get it to "open". it seems stuck somehow. So i am back to my breadboard and my LEDs. I will you updated!
    I doubt there is any "timer" function with that rudimentary componentry.
    Without seeing the tracks on the other side of the board, I would assume that the two transistors allow for both low and high active triggering.
    That means you could select an input that switches the relay on either with zero voltage or a positive voltage(+5 or +12V for example) from an external logic.

    The capacitor and paticularly the diode would suppress voltage spikes when the relay is swithed off.
    There appears to be a Zener diode (silver) as well that might protect the input of the transistors from overvoltage and reverse voltage..
    Last edited by Uncle Fester; 03-04-17 at 11:24 PM.
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    No point continuing with this thread, as the OP only ever posted on the day they joined and hasn't been back since.

    Closed

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