Okl2 pcw assembly help

[Jgmathis]

Opps, typo.. its a pcb not pcw.

Can some one explain this assembly to me? I especially confused by the bottom of the board and the safety switch. Is that a pos or neg logic okl chip?

 

[Visus]

You can order either board check the data sheet and your serial bin. That pcb for the OKl is using a p channel mosfet and a n channel so ya confusing lol.. Ya better ask the manufacturer of the board which it uses.. If I were to guess I would say it uses the negative logic OKl and uses the pchan as reverse batt protection..

 

[Jgmathis]

The two different mosfets threw me a bit. I found out its a neg logic chip. Do you have any idea what type of PTCs are being used? Max input on the okl2 is 20a, but it looks like they are running a ptc in series and in parallel. So strange