Stepper Driver Leadshine EM870S Digital

The EM870S is a new and versatile digital stepper drive based on Leadshine’s widely used DM stepper drives (10+ million units in the field). While maintaining the characteristics of simple design, easy setup, high precision and reliability, Leadshine has upgraded it by adopting the latest step control technology and additional advanced functions for better torque (10-25%), faster response time, smoothing of control commands, easy self-test etc. added.

The EM870S is able to operate 2-phase and 4-phase stepper motors evenly and with very little motor heating and noise. It can take a supply voltage of +20 to +80 VDC and output a current of 0.5 to 7.0 A. All microstep and output current configurations can easily be made using built-in DIP switches. The type of control (step & direction or CW / CCW) and the filtering that smooths the control signal can also be configured via DIP switches. Therefore, the EM870S is the ideal choice for many applications that require simple step and direction control or CW / CCW control of NEMA 23, NEMA 24 and NEMA 34 stepper motors.

• Anti-resonance for optimal torque, extra smooth movement, low motor heating and noise development
• Supply voltage +20 to +80 VDC
• Output current of 1.4 ... 7.0 A via DIP switch (increase by 0.8 A each),
  or 0.5 ... 7.0 A via software (increase by 0.1 A)
• No-load current reduction to 50% or 90% can be selected via SW4 to reduce motor heating
• Motor self-test and parameter auto-setup, offers optimal behavior with different motors
• Step and direction control (PUUDIR) or CW / CCW (double pulse)
• Pulse input frequency up to 200 kHz (500 kHz optional)
• Optically isolated inputs with 5 V or 24 V
• Configurable control command smoothing to reduce engine vibrations
• Micro-step resolution from 16 setting from 200 ... 25,600 via DIP switch,
  or 200 ... 51,200 via software (in steps of 200)
• Self-test for easy diagnosis
• Soft start without "jump" when switching on
• Output control signal for fault signal and motor brake
• Protection against overvoltage, overcurrent and motor cable faults