hi, i have this DSP controller, it has connections for x, y, z and c on board but it writes 3-axis behind. photos are attached, sorry for boards resolution, i crop it out from larger pic. i found another image online alsoç
hi! it might be for 4 axis but you have connections only for 3.
if you need the board as a replacement part for a machine that has 4axis then it should work just take a picture at the connections to know where to place them.