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.
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.
Look Here -> |
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.
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"
TR would be trigger
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...
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!
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.
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.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!
Last edited by Drift; 03-03-17 at 12:15 PM.
gulliver (03-03-17)
Maybe this would do the trick
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.
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.
Update: A deletion of features that work well and ain't broke but are deemed outdated in order to add things that are up to date and broken.
Compatibility: A word soon to be deleted from our dictionaries as it is outdated.
Humans: Entities that are not only outdated but broken... AI-self-learning-update-error...terminate...terminate...
No point continuing with this thread, as the OP only ever posted on the day they joined and hasn't been back since.
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