Modding a Train door button to a PC power button?

[Cipher908]

Hi, I have this door open button from a Class 150 sprinter train and looking to mod it into a power button but I'm not quite sure which of the 4 wires go where and if the LEDs are able to run on the same voltage as the front panel 5V header etc

I found the datasheet for the button but would like a second voice to confirm or correct me if I'm wrong here, I looked at it and found the closest matching diagram which was number 4 on page 8 and assumed wire 2 & 3 are LED+ & LED- respectively while wires 1 & 4 are the switch. Is this right?

datasheet

 

[Sunlight91]

Certainly the existing LEDs won't work on 5V. The supply voltage is 24V. The diagram mentions 1 x 8 LEDs. If they are connected in series you can disassemble the switch and short half of them. Then you have a chance of turning them on. If not then short even more.

I'm not sure about the pin arrangement. In your photos the pins 1&2 are aligned vertical and in the diagram they are horizontal. Ideally you have a power supply to test the pins. As long as you don't shove over 100V into it you should be save. (max VDC is 137V and tolerance -30% to +25%, ideally you use as close to 24V as you can get)

 

[Steevo]

That is a Deustch DT series connector, if the wiring schematic shows which pins I would get the male plug, female pins and lock and wire it up, or eliminate it.

 

[LabRat 891]

ideally you use as close to 24V as you can get

Question:
would using -12V (if PSU is equipped) as 'ground' Work?
(As long as the assembly was isolated from the chassis)

Referencing:

There's a way to avoid changing an ENTIRE industry to get +24V to a single high-wattage device. In fact, we just need to look through ATX spec's history.

Make "-12V" required, not optional.
just invert an independent +12V Rail, already common in PSUs.
Plus, GPUs already have separate power planes; one from the slot, one from auxiliary 6/8/12-pin input(s)

View attachment 311359

DC Transmission and Distribution

Though a.c. is extensively used everywhere, there are few applications like operation of d.c. motors, batteries, charging where d.c. suppl...

kbreee.blogspot.com

I may not be a big fan of Thomas Edison, but he (and the big brains w/ big pockets that standardized US Mains Power) already figured this problem out:
Edison 3-Wire Power Distribution - https://pubmed.ncbi.nlm.nih.gov/17757744/

View attachment 311358

Comparison of Conductor Material in Overhead System

In comparing the relative amounts of Conductor Material in Overhead System necessary for different systems of transmission, similar conditions will be assumed in each case viz.,

www.eeeguide.com

GC-HCPE Power Connector Can Supply more Than 600 Watts to GPU

This is a great opportunitly for a transition to a higher voltage (or rather, a non-fixed voltage). It's now or never. But obviously it's going to be wasted. Because you'll still need 12v for CPUs, fans, ece, so you are only introducing more standards that would need new power supplies...

www.techpowerup.com