Mystery box

Disclaimer: I take no responsibility of anything. What you do with the information on this blog is completely up to you. In fact, do not try this at home or anywhere.

So this mystery box appeared out of nowhere. It seems to have a couple of connectors. One red male and one black female. I wonder what's inside?

Looks like it has a contactor, a piece of PCB with some components for generating a PWM signal and a switch for doing something. The parts could be these:

• https://www.aliexpress.com/item/ZWET-IEC-62196-Type2-3-Phases-Charging-Socket-European-standard-EV-charging-Type-2-connector-for/32805447401.html
• https://www.aliexpress.com/item/TOCT1-4P-25A-220V-230V-50-60HZ-Din-rail-Household-ac-contactor-4NO/32790911085.html
• https://www.ev-power.eu/Electric-Cars/EVSE-Kit-V1-1-for-EV-charging-station-cable-Wallbox-kit-only.html

Looks like this is the manual for the board: https://www.i4wifi.cz/img.asp/?attid=325360

There seem to be no protective components, like an RCBO. One has to assume that if one was to plug this in one would have to make sure the inlet already has all the required protections in place.

Anyone with a keen interest should probably really dig into the board manual to figure out how the things are connected and how to limit the current of the device. There seems to be more than one way to do that. The way it's done in these pictures seems dubious. Perhaps there's a better way?