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Specification:
Current: 30A
Operating Current: 760 mA
Power Supply Voltage: AC 100-250V
Input Voltage: DC 5V
Size: Approx. 14.3 x 6 x 2cm/ 5.6 x 2.3 x 0.7inch
Weight: 184g
Quantity: 1pc
Package Including:
1 x 4 Channel Relay
Andrew Nicklow
Reviewed in the United States on February 26, 2024
Can't turn all four relays on at once. The onboard power supply cannot power all four relays, only two sometimes three
Customer
Reviewed in the United States on December 25, 2024
No problems works as it should. I would buy again
Gman
Reviewed in the United States on November 7, 2023
I use this board to control two 13 Amp single phase 240 volt loads, mostly resistive loads, using a raspberry pi and a python script running on crontab. You'll need a mosfet (IRLB8721PBF TO-220(TO-220AB) MOSFET 30V 62A) and a 1K ohm resistor (I'm using a couple 470 ohm resistors) to amplify the signal from the raspberry pi. I use a single Mosfet and 1 gpio pin on the Pi to drive all 4 relays simultaneously. Make sure the jumper is set to low (default position on mine) I run the loads Normal Open. I use the 5V supply on the board to supply the voltage for the mosfet. Make sure this is also tied into the pi 5V supply so everything is on the same page.If you know how to use a relay look at the bottom of the relay board it has a diagram on it. Pretty self explanatory. You don't need anything else. If you're unsure about the diagram on the bottom of the board you need to ask someone who knows electronics for help before using these or you could damage your micro controller or worse. Also understand what type of load your trying to run. These are probably not suited for purely inductive loads, like a motor, imo. Probably high failure rates after a while with inductive loads. There should be plenty of literature on contact relays and inductive load failures.I also added some extra 14 AWG wire and extra solder to the solder paths on the solder traces on the back that carry the load. BEWARE: I would not trust these relays more than 15 Amps constant at 240 volts, especially without beefing up the solder traces. They get really hot and failure is likely.
Customer
Reviewed in the United States on December 23, 2022
These relays are not 30a rated, reference the manufacturer datasheet. SLA-05-SL-C has a 20a resistive rating on the NO, and 10a on the NC. Also, the built in 5v power supply for the relay coils can't handle all 4 being energized at once. The voltage drops to 3.7v with 3 energized and 2.5v with all 4 energized. I bought 2 of these and the results are the same for both.
Jim Peaco
Reviewed in the United States on November 6, 2022
no wiring diagram. cant find on-line either
Justin M
Reviewed in the United States on November 5, 2022
Doesn't have any documentation or even have picture with an example of how to hook it up which is a bit annoying. What I've found out after thinking it was doa and eventually coming back to it the next day is the side with the big connectors where it shows the 120-220 has to be connected to 120-220. Won't work without it. On the input side there is a 5v and ground. Careful cause that is 5v out, I was powering my Arduino through USB and thought I needed to supply this board with 5v until I checked it with a multimeter. I'm assuming it's for maybe powering a controlling device and I might use it as such maybe. As you will see in a moment I spent a decent amount of time with my nose in this board and I decided to beef up those large solder traces with a whole lot more solder. Like 3-4x the solder. I'm using this for the rated 220v at 30amps and I feel a lot better with more than the thin flow that was present. Might not have been necessary but I don't feel like having to disassemble my whole project this is going in again so I'm opting to be on the safe side here. The biggest bum freeze is that a Arduino doesn't have enough current on a output pin to trigger this. I also tried making a simple switch with a transistor with 5v 2a supply then 12v 2a supply and it still surprisingly didn't work. I'm not super great maybe could be done but I ended up using some 3-12v coil small relays to trigger this board with a 12v 2a supply. Unfortunately still the small relays need 70ma the Arduino puts out ~40ma so I have a row of transistors triggered by the Arduino triggering the small relays with 5v, the small relays trigger the big relays here with 12v. Idk probably a better way to do it but it was a nightmare bear of a time and I'm not spending even more time trying to get something that was supposed to be a convenient boon to probably taking longer than it would have if I just made my own board and new exactly how it worked. Again literally any documentation would have made the whole thing alot easier.
Bruce M
Reviewed in Canada on April 19, 2022
Missing wiring diagram, I took a long search for the matching information
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