see my hand drawn circuit below dated 04-05-2014, 01:43 PM in terms of how to wire up things. when i drew that I didn't know if you need the mi8 or not, you do Not need it. Also, the connections to the 1100 board are well drawn in the fadal manuals.
The 1570-1 should have come with relays. I got mine from ITS / fadal depot. I know that fadalcnc.com has them too. If where you bought from screwed you on relays, send it back or tell them they owe you relays. I paid like $280 for my board, came ready to rock. relay is p/n Omron MY4N. looks like its about $6 ea + shipping; you need two.
Since the board is controlled by voltages internal to the fadal, it doesn't matter what your mains voltage is / make sure you're transformer is tapped correctly at the mains (230v 3ph or whatever). I made this note because I see that you're in thailand - I don't know what voltages and freq your grid power is, but anyway, the relays on the 1570 shouldn't be region specific at all so that isn't an excuse not to have included them for example.
You don't need to use the MI-8 board if you are using the fadal 1570. I have an MI-8, but didnt use it. I may use it on my lathe (got a tool setter for it but not installed yet). You need to understand the fundamental operation of the probe - it is just a switch with a fancy trigger. That is all it is. So the machine electrically can only see 'open' or 'closed' contacts. If you look with a multimeter on the contacts on the probe, you'll see it go open circuit (big resistance value) if you move it ever so slightly / hence the precision and repeatability. Anyway, the point is that whatever config you use, you're better off knowing how it works, then you'll have confidence in your setup.
The fadal board handles the ts27r (or mp4 in my case) probe directly. refer to what is in the fadal manual too, especially for the 1100 board. they did a ****ty job drawing the 1570 but my diagram shows what to do. just ignore the mi8 on my drawing; noting that I wrote mp4 'or' mi8.
The mi8 could actually be used - it's job is to make a 'open' or 'closed' signal that has no voltage across it (draws little / no current). since you have the 1570 you are already doing this. all it means is that you should not hook up the probe directly to a microprocessor pin - use a relay or opto isolator inbetween.
no need to use the mi-8 because you are using the fadal board to do the same function as the mi8. maybe save it for use on another machine.
The MI-12 gets 24v from the fadal 1570 (see the big transformer and rectifier on it? the 1570 makes 24v)
Make sure and run the probe tests under UT on the fadal control - this is the best way to confirm operation of your probes, and fadal 1570 board. M65 activates tool probe, M64 M66 (both codes together everytime!) activates the wireless spindle probe. Also the Jog screen may say 'touching' or 'not touching' if your fadal software rev is new enough. remember that if one probe isn't working, that is the correct way! you must use m codes to activate only one probe at a time - the 1570 makes it so you cannot use both simultaneously which is important because the machine would not know which probe was triggered