Quote Originally Posted by Boyan Silyavski View Post
Sorry, the manual i have downloaded showed only 2 possible connections, which is strange. Good to know. I thought that strange anyway.
The EM series, although very similar features, have variations between the drives, so you get the generic EM series manuals, and drive specific datasheets.
EM402 and 806 are very similar apart from voltage/current ratings.
EM503 and 705 are also similar.

However the pairs vary in what inputs they can handle. 402 and 806 are step/dir only with a minimum pulse timing of 2.5uS, whereas the 503 and 705 can also handle CW/CCW, but have a minimum pulse width requirement of 10uS.
The physical inputs/outputs are very similar, except IIRC on the 503 and 705 the enable signal is 24V tolerant, whereas the 402 and 806 you need to add an external resistor if using more than 5V for enable.