Old stepper driver

Hi everyone,

I have three stepper driver that seems quite old. It’s Seledata SDM 52. 12V-42V 2.0A (here is a picture of the components : http://s1058.photobucket.com/user/nam_cnc/media/ResizeofIMG_0190_zps1d2521fe.jpg.html).

What is the difference between these old driver and new one?

Do you think he is good enough to be used for a small CNC?