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DR4102 Relay Alternatives

 

Hi
I have traditionally used DR4102 relay boards connected to DR4018 or YD8116 switch decoders to control frogs or isolate track sections.?


As the DR4102 boards are now rarely available can anyone suggest a suitable alternative relay board please?

Many thanks

--
Dave, Portland
Church Hope Model Railway
/?
 

Always used relays like this


Simple and cheap


Many Thanks

Iain Morrison


On Mon, 6 May 2024 at 08:32, Dave via <dave=[email protected]> wrote:

Hi
I have traditionally used DR4102 relay boards connected to DR4018 or YD8116 switch decoders to control frogs or isolate track sections.?


As the DR4102 boards are now rarely available can anyone suggest a suitable alternative relay board please?

Many thanks

--
Dave, Portland
Church Hope Model Railway
/?
 

Thankyou, will order some in.?


--
Dave, Portland
Church Hope Model Railway
/?
 

Check your outputs from DR4018/YD8116 as they may be more than 12v depending on your power supply. If it is a lit higher get the 24v versions


Many Thanks

Iain Morrison


On Mon, 6 May 2024 at 13:36, Dave via <dave=[email protected]> wrote:

Thankyou, will order some in.?


--
Dave, Portland
Church Hope Model Railway
/?
 

Don’t forget to add the diode. As in the schematic. As I was told it’s possible to damage the decoder without it.

Alec
 

Hi,
Up to now, I have been using the RL1 Twin Channel Relay Controller for DC/DCC made by Train Tech, the SPDT relays can be individually addressed.? Using these avoids issues that may be encountered from connecting general purpose relays to switch decoders such as overvoltage. Unfortunately, they seem to be out of stock at all vendors.? I believe that there are similar products available but I have no experience in using them, I may have more to say on the other products if the RL1 continues to be out of stock.
Regards,
Alan Mayfield
 

On Mon, May 6, 2024 at 11:57 PM, Alec Hudson wrote:
Don’t forget to add the diode. As in the schematic. As I was told it’s possible to damage the decoder without it.
The YD8xxx have these diodes inside. :) And... on the DR4102 the were never needed as well. Since the DR4018 also had those diodes inside....
 

I use those relay modules you can buy online. They are a neat package with an opto for the trigger input(s) and diode(s) for the relay as well as an LED indicator.
 

Does the DR4024 servo decoder also have the diodes inside please as that’s what I am using the relays on.

Thanks Alec
 

Yep
 

Could you go into a little more detail on how you wire up those modules. I bought a 8 relay module thinking this would work, but I can't seem to figure out how to wire it given the switched output of the DR4024.
?
Thanks
 

On Fri, Feb 14, 2025 at 11:13 PM, Rich wrote:
I bought a 8 relay module thinking this would work, but I can't seem to figure out how to wire it given the switched output of the DR4024.
There are variations with these modules including operating voltage and trigger - many are just Lo others are either Hi or Lo by jumper. Note you need to set the trigger source jumper to use either the same as that driving the relay or an external source.
I don't have DR4018 so I don't know what that device outputs.
However here's a guide which covers the the wiring, although in this case it's triggered by an Arduino
?
?

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