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[garnel]

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Edited by garnel, 23 June 2022 - 06:49 PM.

[garnel]

 

 

 

I'm having a problem with the relays on the Sainsmart board. It worked well for a few days and then not so much. I can hear the relays clicking but there's no output voltage. I'm using 24vdc that is connected to the middle terminal on the relay and the terminal to the left feeds 24vdc to the contactor. I'm using a diode on the contactor. This seems to be a common issue witht the Sainsmart board, no? 

 

What's the best alternative to using the Sainsmart? 

 

Thank you.

This sounds like your contactors draw too much current for the Sainsmart relay contacts, overdriving and causing them to break/bend over time.

What are you using for contactors? Which Sainsmart board are you using? Lets make sure your Sainsmart has enough drive current capacity - from your problem description it sounds like it may not.

 

FYI - I've removed the Sainsmart relay board in my cab due to poor reliability - the mechanical relays wear out/break over time - after having three fail in a little over a year, I'm now using mosfet drivers that connect directly to the ledwiz. If you decide to go the mosfet route, make sure you have a power supply with enough capacity - my toys run mostly on 12v except for the chime unit and knocker which are 24v. Each one drives four channels and have been working flawlessly in my cab for months now. Four of these replace the 16 channel Sainsmart board. Mosfets require more power - a 12v, 30 amp supply works well. 

 

https://www.ebay.com...pMAAOSwr0ZXNv7d

 

s-l1600.jpg

 

All the best with your build,

garnel

 

 

 

According tto the specs, it should be able to handle the load. This is the one that I purchased:

 

 

https://www.amazon.c...ct_details&th=1

 

 

I like the solid state solution that you're using. I'm gonna give that a shot. Thanks so much for the advice. Cheers. 

 

 

 

 

 

 

 

So, I ordered the same mosfet drivers & solonoid that you recommended but I'm little confused on how to wire it up. 

 

 

On the input side I wired it like this:

 

 

V+ (12v)

R (output from LED WHIZ)

 

Output

 

Power + (12v+)

Power - (12v-)

R (to solonoid positive)

I have the negaive terminal of the solonoid run straight to negative of 12 volt power supply.

 

What am I doing wrong? 

 

Several things. Here's how mine are wired.

1. Connect +5v to the ledwiz bank select (4 input connector on top of ledwiz) corresponding to the bank you are using to drive the mosfet module.

    RGBW Module connections:

2. Connect +12V to the +V input.

3. Connect +12V power and ground to the POWER input.

4. Connect +12V to the "S" terminal of the SW3 solenoid.

5. Connect the CH1-4 output you are using to the metal base of the SW3 solenoid. Do NOT connect the base to ground!

 

When energized, the mosfet amp supplies a ground to the base of the solenoid, causing it to activate.

 

All the best,

garnel

Edited by garnel, 23 June 2022 - 06:45 PM.

[billycarp77]

garnel,

 

That worked like a champ. Very much appreciated. You've been a HUGE help. Thank you.

[mrjcrane]

 

I'm having a problem with the relays on the Sainsmart board. It worked well for a few days and then not so much. I can hear the relays clicking but there's no output voltage. I'm using 24vdc that is connected to the middle terminal on the relay and the terminal to the left feeds 24vdc to the contactor. I'm using a diode on the contactor. This seems to be a common issue witht the Sainsmart board, no? 

 

What's the best alternative to using the Sainsmart? 

 

Thank you.

This sounds like your contactors draw too much current for the Sainsmart relay contacts, overdriving and causing them to break/bend over time.

What are you using for contactors? Which Sainsmart board are you using? Lets make sure your Sainsmart has enough drive current capacity - from your problem description it sounds like it may not.

 

FYI - I've removed the Sainsmart relay board in my cab due to poor reliability - the mechanical relays wear out/break over time - after having three fail in a little over a year, I'm now using mosfet drivers that connect directly to the ledwiz. If you decide to go the mosfet route, make sure you have a power supply with enough capacity - my toys run mostly on 12v except for the chime unit and knocker which are 24v. Each one drives four channels and have been working flawlessly in my cab for months now. Four of these replace the 16 channel Sainsmart board. Mosfets require more power - a 12v, 30 amp supply works well. 

 

https://www.ebay.com...pMAAOSwr0ZXNv7d

 

s-l1600.jpg

 

All the best with your build,

garnel

 

I'm thinking Garnel, is on to something with the current draw and the contactors ..... for me since I agreed that all of my toys would be based on 12 volts and no more I don't have any issues with the Sainsmart Relay board and I  ... however I am using relatively low draw solenoids and thus far I am still siphoning off my +12v power from the PC power supply and amazingly everything keeps working and I have not burned anything out yet .. I did have issues early on if or when I did not have the diode pointed in the right direction OR if the diode had burned out for any unusual reason. The Sainsmart has been a very reliable solution for me so .. let us know how you make out with things.

 

Here is a picture of my configuration for the Sainsmart, with a variable resistor for the Shaker Motor speed control.

https://vpforums.org...1/img_43442.jpg

Edited by mrjcrane, 23 June 2022 - 08:31 PM.

[sliderem]

 

This is what I'm using: 
 Baomain AC Contactor CJX2-1810 24V 50/60Hz Coil Normally Open 3 Pole 32A
 
 
 
https://www.amazon.c...product_details

That's the problem!
The coil is designed for 24 VAC, not 24 VDC that you are using. Try a contactor such as the Siemens 3RH1140-1BB40 or equivalent - with a DC coil.
 
I'm using 12 volt SW3 Ford starter motor solenoids in my cab. You can get them for $10 to $15 each. On average, one fails per year - but they are so inexpensive its no big deal.
 
Here's a link:
https://www.ebay.com...yxoCu1cQAvD_BwE
 
All the best,
garnel
 

 
 
I didn't even catch that. You've been a lot of help. I ordered the Ford solonoids. Thanks for all of your help. 

Hello
Are this Siemens Sirius 3R 24V 3RH1140-1BB40 good for solenoids?

I would like to buy some.

Can I find the connection schema somewere?

Thank you in advance