EM556S, 5.6 A, Open-Loop Stepper Driver

EM556S, 5.6 A, Open-Loop Stepper Driver

SKU: SMC-054

New - The EM556S from Leadshine 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 1.8 to 5.6A (4.0A RMS) current.

  • Manufacturer: Leadshine
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1-4items$92.46/ each 
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  • $92.46
In stock(5 items available)

Leadshine EM-S Series consists of stepper drives upgraded from its popular DM series stepper drives. Besides retaining the DM series features of high precision, high reliability, low noise, low motor heating, and low motor vibration, Leadshine has also applied improvements to the EM-S stepper drives such as better motor output torque (10-25% depending motor rotating speeds), convenient command smoothing, better interference resistance, addition of fault output, ...

The EM556S 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 EM556S is able to power 2 phase (1.8°) and 4 phase (0.9°) stepper motors smoothly with very low motor heating & noise. 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.


  • Step & direction (PUL/DIR) or CW/CCW (double pulse) control
  • 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
  • The EM556S is suitable for a wide range of stepping motors of size Nema 16, 17 and 23, and suits various kinds of machines, including X-Y tables, labeling machines, laser cutters, engraving machines and pick-place devices.

The SMC-054 is superseded by SMC-057

Supply voltage: 20 to 50 VDC

Output current: 1.0 to 4.2 A

Logic signal current: 7 to 16 mA

Pulse input frequency: 200 kHz

Microstep resolutions: 16 (200 to 25600) 

Output current settings: 8 (1.8 to 5.6) 

Minimal pulse width: 2.5 µS

Minimal direction setup: 5.0 µS

Isolation resistance: 500 MΩ  

Operating environment: 

  • Environment: Avoid dust, oil fog and corrosive gases
  • Ambient temperature: 0 to 65 °C
  • Humidity: 40 to 90 %RH
  • Operating temperature: 0 to 50 °C
  • Vibration: 10 to 50 Hz  / 0.15 mm

Storage temperature: -20 to 65 °C

Weight: Approx. 230 g

Dimension: 118 x 75.5 x 26 mm

    • SKU
    • Weight
      0.3 kg
    • Dimensions (L x W x H)
      13 x 10 x 4 cm

Faulty Goods and Warranty

Where such goods have been supplied we undertake to repair or replace them as quickly as possible.Prior to returning faulty items, please contact us with a description of the fault as one of our engineers might be able to assist you by resolving the issue over the phone.
A Warranty form must be filled out and returned with any goods.

Our standard warranty period is 12 months from the date of purchase unless stated otherwise.

Other warranty periods:

Labjack Products: 5 Years
Atop Products: 3 Years
MeanWell Products: 3 Years
Terracom Products: 3 Years

Warranty is subject to us being satisfied that a defect was caused by defective workmanship or materials and was not caused by or was not substantially contributed to by other factors beyond our control including incorrect installation, alterations or modifications of the product not recommended by the manufacturer.

Returns Policy

If you are dissatisfied with our goods you may return them within 14 days of the dispatch date. Contact us for an authorisation and we will refund your purchase less shipping costs and restocking fees. All returned goods MUST be in AS NEW condition including ALL PACKAGING and DOCUMENTATION / MANUALS etc.

Please note:

  • The product returned will attract a 20% restocking fee.
  • The customer must pay the delivery costs.
  • Non standard, custom made or a specially manufactured or imported products are not returnable.
  • Semiconductors, books and software are not refundable

Full Terms and Conditions

By placing an order with Ocean Controls, you agree to be bound by our Terms and Conditions of Trade.

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