... /32,1/64,1/128,1/2561/5,1/10,1/25,1/50,1/125,1/2504.Protect ... pulse input+5V (Rising edge effective , rising edge duration >10μS)6,DIR +,DIR-:Stepping motor direction input, voltage level ... is protected : When the double-phase electrical machinery is connected with driver , users are apt to connect the phase by ... ,installation dimension Stepping motor driver,1.3A-4.5A,high quality and reasonable price