I'm looking at using this for a custom application and just need to know if you can answer a few questions. 1) The relay switch is controlled by 120 volt and is separate from the switch sides? 2) The switch sides are independent from the relay power...
862227
I am using these relays to control multiple 12 volt switches (zone valves), so I assume, IMO, the answers are yes, yes, yes.
1515707
The jumper enables you to isolate the relay control circuit from the coil (The relay has optical isolation when the jumper is removed). If you remove the jumper you'll need to provide power to the coil separately. This is useful if the device that is controlling the relay can't provide enough current (or voltage) to drive the coils.I have a short video of the relay in operation in my review (http://www.amazon.com/gp/review/R2AZD0UTXMKUD1/ref=cm_cr_pr_rvw_ttl?ie=UTF8&ASIN;=B0057OC6D8) - Unfortunately I don't show the jumper in use though.
1816702
The idea of a relay is to switch a higher current circuit with a lower current input. For example, you could use a tiny on/off switch meant to only handle 1-2 amps to power the relay, and that closes the circuit on an isolated circuit of the relay that can handle up to 40 amps (big lights, for example). If you ran the small switch directly on the input of the lights, you'd burn out your switch instantly.
657042
The logic for the relays is controlled by the middle pins, while the power for the relay is controlled by the JD-VCC pin. If you're using a Raspsbery Pi, you'd want the logic at 3.3 and the relay power as 5v, so you'd disconnect the jumper and use 3.3v power to the Vcc and the 5v power to the JD-VCC. (Note that the Gnd is common, so you can use just one ground cable). If your project doesn't have enough current to power all the relays you need, then you'd run the JD-Vcc off an external power supply.
1223540
In a portion of my design (trailer wiring system), I have a 400 Watt DC to AC converter which connects to a AC wall outlet in my trailer. I have a trickle charger hooked up, so not many watts drawn. This has worked for me so far. The main wires going through relay end up having AC power through them. The actuator in the relay is controlled by magnet (and I still use 12 volt to control relay), so the magnet portion of relay doesn't make direct contact with AC power. Can't say for sure on 24 volt if it will work, since I still use 12 volts to actuate magnet in relay. I actually disected a relay to see how it worked before building my system. I hope this helps. In a portion of my design (trailer wiring system), I have a 400 Watt DC to AC converter which connects to a AC wall outlet in my trailer. I have a trickle charger hooked up, so not many watts drawn. This has worked for me so far. The main wires going through relay end up having AC power through them. The actuator in the relay is controlled by magnet (and I still use 12 volt to control relay), so the magnet portion of relay doesn't make direct contact with AC power. Can't say for sure on 24 volt if it will work, since I still use 12 volts to actuate magnet in relay. I actually disected a... » Read More In a portion of my design (trailer wiring system), I have a 400 Watt DC to AC converter which connects to a AC wall outlet in my trailer. I have a trickle charger hooked up, so not many watts drawn. This has worked for me so far. The main wires going through relay end up having AC power through them. The actuator in the relay is controlled by magnet (and I still use 12 volt to control relay), so the magnet portion of relay doesn't make direct contact with AC power. Can't say for sure on 24 volt if it will work, since I still use 12 volts to actuate magnet in relay. I actually disected a relay to see how it worked before building my system. I hope this helps. « Show Less
2190326
The switch has leads for (2) circuits in, and (1) circuit out. The first circuit is normally closed. This is where you would wire your "regular" full time power to. Under normal circumstances the current would pass thru this relay continuously as it is normally closed, while the second circuit relay is normally open. If power is interrupted to the full time relay, it changes state to open and the second relay changes state to closed allowing current from the secondary circuit to pass thru the switch. I use this switch to control my inverter/generator circuits. Since I generate my own power, but my inverter system is my primary power source, my inverter is connected to the normally closed relay where my generator (part time power) is connected to the normally open relay. When the generator is not running, the switch passes inverted current to the fifth wheel. When the generator starts, the relay changes states and removes the inverter from circuit and applies generator current to the fifth wheel. Hope this explains how the switch works. Scott
1744601
The output is a bimetallic switch which is a mechanical switch with time delay so it doesn't respond to things like passing cars. The operative word here is mechanical as opposed to solid state. Solid state relays are fussy about what flows through them (incandescent, CFL, LED) . This is basically a regular on/off switch and doesn't care what it switches as long as you don't exceed the maximum current ratings.
1600307
The relay contacts do not supply power. You use them as a switch for the power you wish routed through them.If you are that unfamiliar with power control devices, then you may consider not working with high voltage circuits.This is pretty basic stuff... the relay closures are not a switched AC outlet.
1738346
The relays can take "up to" 30/40 AMPs, so as long as your design draws less than 20 AMPs your switchs will be OK. I'm not sure how many AMPs it takes to activate the relays, but I don't think it is very much.
450347
It does not have individual circuits. It is used solely as a manual transfer switch whereas utility power and generator power come in to the box, and then EITHER feeds another main box with individual circuits, but will not allow utility nor generator to be on at the same time.
243085
the way I wired it was simply power and ground. I wired it to a relay first then a switch. its really basic
1130336
Hello. I used mine for a 12V system. I am looking at one of mine that I haven't used yet right now.. there is no rating on it at all! Strange! The terminals on the end are not very big, like for a smaller gauge of wire that would be safe for a relay application but not large enough for 110 house wire. It's actually made pretty nice. So..I'm sorry that I am not much more help. Good luck
538271
NO, that's not true, U.S uses 120vac, rest of the world is 220, the relay can take up to 250vac, so you're good, I'm an Electronics technician by the way :)
414813
No it is mainly for low current applications as in garage door opener, how ever a 110 volt relay could be used as the switching source for the 20 amp power.
982603
There is nothing to set up. It is 4 separate relays on one board. Each has a dry set of contacts and a trigger input. A single power input supplies the 4 relays. I tried it and it worked with out any problems. However, the input tabs break very easily and I would not buy it again.
772738
The ST01C unit runs fine off batteries and the battery will last at least 1+ year - many get up to 3 years. No "powerline" voltage is used - this is not a trickle powered type switch. The battery operates a relay switch. So the timer switch will turn on and off as programmed even if you have no electrical power. And because it is a heavy duty relay, it matters not as to whether the circuit is a 1/2 watt night light, a 1 HP motor or whatever up to 15 amp. Many other switches do use trickle current, but not this one. I am a user that purchased from Amazon and very satisfied. Only thing I'd say is watch the video on youtube to make the programming easy and yes the clocks in these units do gain/loose a few minutes over course of a year.
157647
It's frequently used for controlling heating elements in applications with PID temp controls, but you're right the relay itself has no temperature control properties