... : differential input (26LS32);* Allow parameters download by pc or text display through interface RS232C;* Perfect protection against overload, I2T, over-voltage ... adjusting, CCW to minimize value, CW to maximize value)One 4 bit double row pin on drive circuit board for the working ... mode setting, number 1, 2, 3, 4 respectively from the outer to inner side.no plug in ...