hi Patric,
The relay used inside the IoCore is Tyco Electronics PCN-105D3MHZ. It goes up to 3A, 30V(DC) and 250V(AC).
The PoE is class 1.
The GPI input range is 0-10V. By using the 'calibrate' function, you can make it work with any range between 0V and 10V.
cheers,
Maarten