Leadshine EM542S, User Manual

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EM542S Digital Stepper Drive User Manual
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1. Introduction
The EM542S is a new digital stepper drive based on Leadshine’s widely implemented DM stepper drives (10+ millions
of units in field). While retaining features of simple design, easy setup, high precision and reliability, Leadshine has
also upgraded it by adopting the latest stepper control technology and added additional advanced features for better
torque (10-25%), quicker response time, control command smoothing, easy self-test, etc.
The EM542S is able to power 2 phase (1.8°) and 4 phase (0.9°) stepper motors smoothly with very low motor heating
& noise. It can take 20-50VDC supply voltage and output 1.0 to 4.2A current. All the micro step and output current
configurations can be easily done via built in DIP switches. Its control type (step & direction or CW/CCW) and
command smooth filtering can also be configured via DIP switches. Therefore, the EM542S is an ideal choice for
many applications requiring simple step & direction or CW/CCW control of NEMA 17, 23, and 24 stepper motors.
1.1 Features
 Step & direction (PUL/DIR) or CW/CCW (double pulse) control
 20-50VDC supply voltage
 200 KHz max pulse input frequency
 16 micro-step resolutions of 200-25,600 via DIP switches

8 output current settings of 1.0 – 4.2A via DIP Switches
 Configurable control command smoothing for performance excellence
 Automatic idle current reduction to 50% or 90%
 Convenient self-test for easy diagnosis
 Automatic self-configuration to match wide-range NEMA 17, 23, and 24 stepper motors

Anti-Resonance for optimal torque, extra smooth motion, low motor heating and noise
 Soft-start with no “jump” when powered on
 Optically isolated inputs
 Fault output
 Over-voltage and over-current protections

CE certified and RoHS compliant
1.2 Applications
The EM542S stepper drive is designed to power 2 phase (1.8°) or 4-phase (0.9°) NEMA 17, 23, and 24 hybrid stepper
motors. It can be adopted in many industries (CNC machinery, electronics, medical, automation, packaging…) for
applications such as CNC routers, mills, plasma, laser cutters, factory assembly lines, vending machines, etc. Its
excellent performance, simple design, and easy setup features make EM542S ideal for many step & direction control
type applications.