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Stepper drive 12-34V 3A, with I/O and RS-485:

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Bipolar stepper drive, with high-level commands via RS-485

Makes it possible to control a stepper motor from a PLC or (mini-)computer, even using interpreted/scripting languages. The RS485 can connect several modules (stepper or I/O) on the same line, even at great distance. This drive also supports Step/Direction signals.

Buy Ministep online in the e-commerce site of Xon Electronics

Technical data

Product description

Ministep is a bipolar stepper motor drive with advanced commands for positioning and I/O reading. Several features make this module special, such as compact size, Modbus or simple and easy text protocols on the RS-485, special functions on the I/O pins. The device is configured through dip-switches and RS-485 interface, and can store its settings into the internal non-volatile flash memory. Once configured, it can work using solely Step/Direction signals, without RS485 connection. The I/Os (3 inputs and 1 output) permit different applications, for example a limit switch or other equipment; it is also possible to interface a quadrature encoder (readable via RS-485) to implement a closed-loop system.

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Typical applications

Stepper motor control, possibly in combination with other modules on the same bus (Ministep, Minimod...), in the automation/robotics field.

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Technical details

  • Power supply from 12 to 34 volts D.C.
  • Driving current up to 3A continuous, (6A peak)
  • Full step, half step, microstepping up to 1/16
  • Configurable currents for stop, run, acceleration and deceleration
  • Configurable speed profiles
  • Commands for absolute/relative positioning, and other advanced functions
  • 3 digital inputs for general purpose I/O, limit switch, encoder, Step/Dir signals; 1 output (Ready/Busy)
  • Settings configurable via rotary selector, dip-switches, internal flash memory
  • RS-485 interface with 2 protocols: Modbus, or simple text commands
  • Internal watch-dog for safety and reliability
  • 2 status LEDs
  • Electronic circuit embedded in resin, in plstic container with fixing holes
  • Extractable terminal block

Other features

The inputs (0-34V) can be used in several ways:
  • all are readable via serial line, and have an associated counter
  • FC can be used for a limit switch, to perform accurate zeros (reset)
  • I2 and I3 can be used as Step/Direction signals
  • I2 and I3 can be used to connect an incremental encoder
The Modbus protocol is an effective and well-known industrial standard, yet easy to implement. Alternatively, the simple text protocol can be used, which is even easier to manage with any computer, even very small.


Power supply: from 12 to 34 volts DC
Current consumption:
100 mA (the device itself), 3.1A total (up to 6.4A peak)
Working temperature: from -10 to +50° C
Dimensions: mm 95x110x24
Robust plastic container and resin
Extractable terminal block

XON Electronics Srl - P.Iva I-02828930046 - PEC xonelectronics@pec.xonelectronics.it