Enclosed AC/DC Power Relay with Protection & De-Bounce. Screw Terminals. 120V Trigger Input.
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It's a switch, this thing. The switch flips when power is applied to it. When power is applied to the switch, it will turn ON, and when power is removed, it will turn OFF. Alternatively, you can make the switch turn on when there is no power and turn off when there is power. br>So you'll need something to turn on the switch by sending power to it. Let's say you want to open your garage door with a smart plug that you can control from your phone. The smart plug is designed to turn on and off, sending 120 volts ac to whatever it is connected to. Your garage door, on the other hand, is controlled by a low-voltage circuit. I'm not sure if it's 5 or 12 volts. So, if you wired the wires from your garage door opener's control button to your smart plug, you'd burn out the garage door opener's control circuit because you'd be putting 120 volts into a low voltage circuit. BUT! You could plug this relay into your smart plug, then wire your garage door control circuit to it, safely controlling the garage door because the low voltage circuit would be isolated from, but controlled by, the 120 volts from your smart plug.
These are not AC/DC converters, but mechanical relays. The output terminals will actuate and be connected together when you supply 120VAC (and the switch is on) at the plug side (there are actually two contacts, one normally-closed and the other normally-open). 1 normally-open and 1 open closed). As a result, any voltage applied to the common pin screw terminal will be applied to the NO (or NC) screw terminal as well.
Sir- br>The controlling input must be between 90 and 100 percent. 130VAC. br>The output is a set of isolated "dry contact" relay contacts that can switch between AC and DC voltages. br>I hope that this clarifies things for you. If you have any questions, please do not hesitate to contact us. Thank you for taking the time to look at this.
- Martin is a student at the University of Team
Hi Sir- From the power cord to the terminal strip, there is no risk that we are aware of. Mistakes, on the other hand, could result in a safety issue. connecting the terminals with something. If this is your first time using a relay, we recommend sketching out a schematic of what you want to do. Then, before you apply power, have it checked by a professional. br>I hope that this information is useful.
- Martin
Selected User Reviews For Enclosed AC/DC Power Relay with Protection & De-Bounce. Screw Terminals. 120V Trigger Input.
When I turn on the AC power to the relay, the power light comes on and there is a click, but the relay does not close the contacts for up to 5 minutes. When I connect the N/O terminals with an ohmmeter and turn it on, nothing happens for a while, usually about 5 minutes. I can plug and unplug the AC power after it finally closes the contacts, and the relay behaves properly. It takes a long time to close the contacts again if I repeat the process an hour later. br>br>I contacted customer service, who advised me to contact engineering. They won't send me a new one unless I return this one at my expense, which will be the same as purchasing a new one. Fortunately, I can return it to Amazon for a refund and receive a replacement. Although Digital Loggers has a good reputation, I believe their warranty policy is inadequate, as it requires you to ship the product back to them at your expense.
I needed a relay so I could use Alexa to control my (gas) fireplace. br>I discovered this relay after exhausting my search for a'smart' device that could work with low-power switching. I was able to put the relay in line with the wall on / off switch by using this and a Smart Plug (plugged into the outlet that was part of the fireplace ignition system). I can now control the fireplace with Alexa. Smartthings can also be used to control scenes. br>I can use the original on/off switch as a kill switch if I leave it in place. Nothing will happen if it is turned off, but it will work if it is turned on. br>I'm in a good mood.
For when the power goes out, I built a couple of light boxes (which contain 12v batteries and lights). 'What would I have to do to get this thing to automatically turn on the lights when the power goes out?' I wondered. Add a normally closed relay that I can plug into a wall outlet! As a result, I began my search for 120 volt relays. I looked into building my own relay for the project for quite some time and eventually came across this item. I bought it right away after finding it and seeing the price. Having everything neatly packaged in such a small package was exactly what I was looking for, and it saved me the time and effort of doing it myself. I wired it up to the normally closed side of this unit and added a port to my light boxes that I could disconnect if I needed to move it around. When the power goes out, it always closes the loop, and I have light right away.
br>My most recent application - I bought a $3 battery alarm clock and cut one of the battery wires to connect it to the relay's normally open side. It's plugged in beside my bed, with the alarm set anywhere between 1 and 4 hours (depending on the situation).
Why? br>br>Where I live, there are frequent power outages, so the clock starts when the power goes out. I now know how long the power was out (so I know when to get out the generator and plug the refrigerator in), and the alarm will wake me up if it happens in the middle of the night. The fridge quickly heats up to 40 degrees in the summer, so I set the alarm for 2 hours, which is my cue to turn on the power before any problems arise.
This relay was ideal for the job! Without any additional circuitry, the trigger side is driven by the float closing on one pump (starting that pump). All I had to do was connect a piggyback trigger line (similar to a float) to the normally closed terminal switch on the relay that feeds the other pump. The float trigger on the other pump is still in place. When the first pump is turned on, the NC opens, cutting power to the second pump. When the first pump is turned off, the open switch is reset to closed, allowing the second pump to function.
In the event of a power outage, I added a UPS to my pellet stove. However, with the power out, it became clear that the thermostat needed to be turned off as well, in order for the stove to stop dropping pellets and continue to burn. When the ac power goes out, this power relay is wired in series with one of the thermostat leads, allowing it to open circuit the thermostat. That's exactly what it's for! As a result, if the power goes out, the thermostat circuit opens, and the pellet stove stops producing heat, shutting down in about 15 minutes. This keeps the smoke out of my house. That's extremely risky. This power relay is solidly constructed and reasonably priced!.
For my security system, I connected this relay to a door/window sensor (there are two wires!). You can connect this if you've already connected your stereo speakers. My sump pump and I shared the top outlet, so I plugged the relay in there as well. When the power to the outlet goes out, the sensor sends a "door open" signal to my alarm system, which then sends a text message to my phone informing me that the power to my sump pump has gone out. I couldn't be more pleased with the relay's functionality and high quality. I'm going to buy two more to keep an eye on a couple of other important systems in my home.
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