Programmable stepmotor controller SMSD‑8.0LAN

SMSD‑8.0LAN is a high current version of SMSD‑LAN stepper motor controllers. SMSD‑LAN differs with an advanced communication protocol for a motor control and provides high dynamic performance. This controller was developed by our engineers for e stepper motors with current per phase up to 8.0A. The most useful advantage of the controller - remote control and Ethernet connection and control of a stepper motor using a local network. USB connection is also provided.

Another useful characteristic of the controller - it provides two different methods of phase control - current control for the better torque and dynamics and voltage control for a range of great requested motor models. This control mode provides singularly smooth motion and accurate microstepping ratio up to 1/128.

The controller provides 5 different control modes: real-time control by commands, motion control according to one of 4 executing programs, which are stored in a controller'r memory; analog speed control; analog position control; STEP/DIR pulse position control. Digital I/O of the controller make it easy to use the controller together with other electronics of a system.

The main parameters of programmable stepmotor controller SMSD‑8.0LAN

  • Max. current per phase - 8.0 Amp
  • Power supply - 24 ‑ 48 VDC
  • Microstepping mode - 1, 1/2, 1/4,1/8, 1/16, 1/32, 1/64, 1/128
  • Communication interfaces - Ethernet, USB.

The control modes of SMSD‑8.0LAN

  • Program mode - SMSD‑8.0LAN provides 4 independed memory area for storage of an executing programs. Control commands are assembled into a control sequences, saved into the controller's memory and can be called later during a standalone operation or from a computer. This mode is widely used for cycle and repetitive actions. The motion algorithmes are recorded to the controller from a PC using a local network Ethernet or USB connection. Afterwards every of 4 programs can be executed as per input signal or as per a command from a PC. Please, refer to the user manual and communication protocol for a full list of executing commands. Special software for program assembling and downloading to the controller is provided by our company for free.
  • Direct cotrol mode - control stepmotor in real-time mode by commands, set from a computer (Ethernet or USB). The controller execute every command as soon as receive it from a computer. Calling a program from the memory, cycles and "if conditions" are also possible in this mode. Please, refer to the user manual for a full list of executing commands.
  • Analog speed control - manual mode - it is used for smooth speed regulation without PC connection. The motor speed is proportional to analog voltage signal, potentiometer regulation is also possible. Direction and start/stop are controlled by digital inputs.
  • Analog position control mode - provides regulation of an angle displacement. The rotor position depends on an analog control signal (voltage or potentiometer regulation) - from 0 to 270°.
  • Pulse position control STEP/DIR - the standard position control mode, motor speed is proportional to a STEP voltage signals frequency, displacement is proportional to a STEP signals quantity. Rotation direction depends on a voltage level at DIR input. Additional ENABLE signal is also provided.

Functions and possibilities of stepmotor controller SMSD‑8.0LAN:

  • Remote control through Ethernet;
  • Standalone motor control according to one of 4 independent executing program sequences, stored in the controller’s memory;
  • Real time stepper motor control by commands forwarded from a computer via USB or through a local network Ethernet;
  • Recording and reading of executing program sequences through a local network Ethernet or USB interface;
  • The controller keeps in memory up to 4 independent executing program sequences. Each one can be started in a standalone control mode or called via communication interface (Ethernet or USB); every program can be called and used as a subprogram of any other program. Every program contains up to 255 control commands;
  • Program control of an internal relay is provided;
  • Motor control parameters (such as current per phase, holding current, microstepping mode, control mode) are adjusted using menu of the controller or via communication interface (Ethernet or USB);
  • Pulse position control with standard signals 0/5 VDC (up to 24VDC on condition that additional current limiting resistances are used) «STEP», «DIR» and «ENABLE» is provided;
  • Analog speed control is provided: using internal or external potentiometers or analog voltage signal 0..5 VDC;
  • Analog position control is provided: using internal or external potentiometers or analog voltage signal 0..5 VDC;
  • Motor stop is provided as received signal from an emergency sensor;
  • Change of motor motion direction is provided as received signal from a revers sensor;
  • Homing position function is provided;
  • Storage of a mark (current) position and motion to the mark position is provided;
  • Synchronized operation of several controllers and other devices is provided by inputs and outputs;
  • Automatic source voltage control – if the power supply falls outside the allowance range (less than 20 VDC or more than 51 VDC) when the controller is switched on or within 2 seconds during operation, the controller outputs the alarm;
  • A motor acceleration and deceleration is adjusted from a controller menu or via communication interface;
  • The controller is equipped with an internal brake resistor. External brake resistor can be connected as well if needed;
  • Alarm sound and indication of a code of the alarm are provided;
  • 2-sign 7-segment display is provided for indication of alarms, control modes and the controller adjustment;
  • 32-bit password secures access through the local network, 1 second interval of authorization provides strong access protection (exhaustive search requires 136 years).


It is possible to use open communication protocol or ready software for stepmotor controllers`SMSD‑8.0LAN. The software SMC-Program Ver.5 provides connection and control of few devices connected via Ethernet or USB interface.

SMC-Program software for stepmotor controller

SMC-Program - software for stepmotor controllers

SMC-Program - software for stepmotor controllers

Dimensions of programmable stepmotor controller SMSD‑8.0LAN:

Dimensions of stepmotor controller SMSD-8.0LAN