No need to worry about the L vs. N connection.
No specific orientation, just ensure the AC 240V connected to the input of the step down transformer.
Refer to this post for further details.

If you compare the doorbell owned by psyntium vs. sw.boutique, the two are entirely different design.
However, the doorbell with two wires design still backward compatible with existing wiring (4 wires type).
It's just a matter of connections. For further assist, post the picture of the doorbell.

And please makesure your live wire RED and BLACK don't have supply or electric. Before you do the joining.

OFF the breaker to the wire or RCCB/main breaker if you don't no which 1. Pay attention to the safety.

oh tqtq.. thanks for the guidance!.. managed to get it work now..

I managed to take the photo of the door bell internal as per attached.
Please help to confirm whether I can use it for double storey house in return. If not any way to make the modification?


This post has been edited by N73: Jun 2 2014, 01:09 AM

Here you go...
Conversion from 4-wires type to 2-wires type doorbell.
No major modification needed. Just add one terminal block connector.



Please take note of this type of doorbell design weakness!
If your doorbell switch located at outdoor and exposed to rain water, make sure you use the outdoor rated switch.
Non-outdoor rated switch will give you headache due to short circuit caused by water.
Short circuit will lead to nuisance MCB tripping.

Please don't do this kind of wiring, can kill the person pressing it when wet.

Yup, warning already given about the potential short circuit hazard!
That's the reason why there's a another variant design with step-down transformer.

I have a feeling this may not be an outdoor design door bell, or not made for Malaysia market.

Pros and cons...

Transformerless: Simple, reliable and low-cost. Suitable for indoor application like apartment.
Step-down transformer: Safer due to transformer isolation. However, the system always on standby mode and consume electricity.

Yup, this door bell I actually bought from Thailand. I buy this door bell mainly of the brand name and sound i like BUT very unfortunately you guy mentioned this is not suitable for outdoor. If u go to Schneider Malaysia website you may found they sell the weatherproof door bell switch BUT just cannot find this door bell sell in their Malaysia website.

This post has been edited by N73: Jun 3 2014, 11:00 PM

Waterproof switch don't last forever chances it fail before your door bell, and may lead to leak.

I have change 2-3x the door bell switch for over 16yrs. Due to the degrade of the plastic and switch mechanism spoil. Mostly cause by the UV sun. While the indoor door bell last till now.

So when the switch mechanism spoil, the internal contact is expose. I cannot immediately get a new 1 and change. That is dangerous when somebody press the switch. But the switch is no longer there. His finger is going to touch that 240v contact inside. Specially at night.

I have to get a pvc tape to temporary seal the hole. While go and buy a switch. But lucky my door bell switch contact is not 240v or 2 wire bell.

I found this outdoor enclosure box for doorbell switch at lelong.com.my.
If you really like it, just go ahead install your doorbell. Ensure proper weather sealing for the switch.

Few months later you see lots of small friends inside.

Anyone knows how to modify the two wired door bell to four wired door please share. I was thinking to add step down transformer BUT don't know how to connect the wiring diagram. Appreciate ant sifu can help here.

You can't add step-down transformer to a doorbell system that required AC 240V as input power source.
Just buy the weatherproof switch to solve your problem.

How about a step down transformer plus a relay? Will it work?

Speaking of weatheproof switch and it's a bit off topic but just to ask if anyone installed outdoor switch sockets?