RTA – A-NDC – Boxed, Stepping Motor Drive

  • Series of stepping motor drives with Modbus TCP/IP interface.
  • Drives optimized for coupling with SANYO DENKI stepping motors, fitted with encoder.
  • Compact system, developed to offer a wide variety of integrated functions and optimized for the most demanding motion control applications.


  • Series of bipolar microstep stepping motor drives, specifically developed for applications sensitive to acoustic noise and vibration.
  • Significant evolution of the NDC series, preserving backward mechanical, electrical and applicative compatibility.
  • Target: advanced applications requiring high precision, smoothness of movement and low acoustic noise.


  • Full digital microstepping drive.
  • Adaptive microstepping up to 12.800 step/rev (1/64).
  • Intelligent management of the current profile that achieves good results in terms of smoothness of movement, low noise and vibration control.
  • A highly sophisticated control system, preserving anyhow the traditional ease of use of R.T.A. drives.

Technical Specifications

  • Version: drive housed in a metallic box in 110 x 108 x 34 mm, equipped with plug-in connectors.
  • Range of operating voltages: 24-85 VDC.
  • Range of current: 0.6 -2 Amps. Setting up to eight possible values by means of a dip-switch.
  • Microstepping: 400, 800, 1.600, 3.200, 6.400 and 12.800 steps/revolution. Setting by means of a dip- switch.
  • Management of the current profile setting by means of a dip-switch.
  • Automatic current reduction at motor standstill.
  • Protections:
    - Protection against under-voltage and over-voltage.
    - Protection against a short-circuit at motor outputs.
    - Overtemperature protection with thermal sensor.
  • Electronic damping facility for further acoustic noise and mechanic vibrations reduction.
  • Optoinsulated inputs to ensure best EM noise immunity.
  • Warranty: 24 months.


Model Name Drive Type Bus Voltage Range (Volt.) Phase Current Range (Amp.)  Dimensions (mm.) Suggested Motors (Flange size) 
A-NDC 94 STEP/DIR ADVANCED 24 - 85 VDC 0.6 - 2.0 Box 110 x 108 x 34 mm Plug in connectors NEMA 11, NEMA 23, NEMA 60, 34 mm
A-NDC 96 STEP/DIR ADVANCED 24 - 85 VDC 1.9 - 6.0 Box 110 x 108 x 34 mm Plug in connectors NEMA 11, NEMA 23, NEMA 60, 34 mm