Digitax HD M751 Base

Base drive for configuration flexibility

Digitax HD M751 Base

Servo Drives and Motors

1.5 A – 16 A with 48 A peak
200 V 400 V | 0.25 kW - 7.5 kW

Configuration flexibility with option modules

Digitax HD M751 Base servo drive offers configuration flexibility with two option slots for functionality extension and customisation.

With built-in RS485 communications, Digitax M751 also features an on-board Advanced Motion Controller for distributed 1.5 axis motion control.

One servo system for ALL your automation needs

Configuration flexibility with option modules

The ultimate flexibility drive for machinery manufactures includes two option slots for functionality extension and customisation. Built-in Modbus RTU over RS485 communications. Onboard Advanced Motion Controller for 1.5 axis motion control. Analogue and pulse/direction control for centralised motion. Improved productivity with machine safety.   

Advanced Motion Controller onboard
Advanced 1.5 axes motion controller, key features include 
  • 250 μs cycle time
  • Motion profile generator
  • Electronic gearbox
  • Interpolated cam
  • Homing functions
  • High speed position freeze
    • Features
      Maximum performance
      • 300% peak current performance pulse-duty overload
      • Optimised control loops for high dynamic performance
        • 62.5 μs current loop
        • 250 μs position and speed loop
      • Up to 16 kHz switching frequency
      • Supports a wide range of feedback technologies including Quadrature, SinCos (including absolute), SSI, BiSS, EnDat (up to 4 Mb with EnDat 2.2) and resolvers
      • Maximum performance package with high torque density, low inertia Unimotor hd servo motors
      • Analogue and pulse/direction control for centralised motion
      • Advanced 1.5 axes Motion Controller, key features include:
        • Real-time tasks
        • 250 μs cycle time
        • Motion profile generator
        • Electronic gearbox
        • Interpolated CAM
        • 2Homing functions
        • High speed position freeze

      Minimum size
      • 40 mm drive width and option bracket adds 22 mm, providing a highly competitive maximum drive width of 62 mm
      • Reduce cabinet height by directly stacking rows of drives. Patented Ultraflow™ technology expels heat directly outside of the cabinet through the rear of the drive (drive heat dissipation can also be achieved via vents on the top of the drive, as standard).
      • Fits into cabinets just 200 mm deep

      Easy installation and setup
      • DIN rail alignment
      • Kits for easy multi-axis installation
      • Single motor cable and electronic motor name plate for fast set up
      • Seamless motor-drive pairing with Unimotor hd servo motors
      • Easy access pluggable connectors
      • Rapid commissioning with the Connect PC tool and SD cards
      • Machine Control Studio provides a flexible and intuitive environment for programming automation and motion control features
        • Programmable with IEC61131 standard languages

      • Two option slots for functionality extension and customisation (see available option modules)
      • Built-in RS485 communications

      Safety on-board
      • Improved productivity with machine safety
        - Integrated dual Safe Torque Off
        - Meets SIL3 (Safety Integrity Level 3) and PLe (Performance Level e)
    • Functional Safety
      Functional Safetyfunctional-safety

      All Digitax HD drives have integrated dual Safe Torque Off (STO) inputs, certified to SIL3 / PLe, providing an elegant and reliable safety solution. 
      The addition of an MiS250 safety option extends the built-in STO with the ability to safely monitor and/or restrict the scope of motion. 
      Safety functions include: STO, SBC, SOS, SS1, SS2, SLS, SSM, SLA, SDI, SLP & SES
      For maximum flexibility in the safety system architecture, the modules support both wired and network safety connections: CIP-Safety on EtherNet/IP and Safety over EtherCAT (FSoE).
      To find out more, visit our Functional Safety page.

    • Options & Accessories

      Remote Keypad RTC
      The keypad is remote mountable, allowing flexible mounting on the outside of a panel (meets IP54/NEMA 12). Three line plain text, multi-language LCD keypad for rapid set-up and helpful diagnostics. Battery operated real-time clock allows accurate time stamping of events, aiding diagnostics.

      ORDER CODE: 82400000019600

      KI Compact Display Option module for servo drive
      KI-Compact Display
      The display (fitted on M753, optional on M751) ensures access to drive diagnostics even in the absence of network connectivity. Includes 2 rotary switches for hardware setting of the node address for faster commissioning of the motion network. 

      ORDER CODE: 82700000020400

      KI-Compact 485 Adaptor
      This allows the drive to communicate via RS485. This is commonly used for programming if a keypad or KI-Compact Display is not ordered with the drive.

      ORDER CODE: 82700000020300

      Integration Products

      Remote I/O
      Industrial control applications typically use a PLC system to manage the process; using I/O to provide an interface to switches, relays and sensors attached to the machine.

      RTMoE & MODBUS TCP Network Adapter ORDER CODE - IO210-BC

      EtherCAT Network Adapter ORDER CODE - IO211-BC

      System Integration Modules - Feedback

      Quadrature encoder input interface module.

      ORDER CODE: 82400000018100

      SI-Universal Encoder
      Encoder input and output interface supporting Quadrature, SinCos, EnDat and SSI encoders.

      ORDER CODE: 82400000018300

      System Integration Modules - Communications

      SI-Profibus Communication System Integration Modules

      SI-PROFIBUS interface module enables follower connectivity. It is possible to use multiple SI-PROFIBUS modules or a combination of SI-PROFIBUS and other option module types to add additional functionality such as extended I/O, gateway functionality or additional PLC features.

      ORDER CODE: 82400000017500


      SI-POWERLINK serves applications ranging from simple open-loop systems through to those demanding precise motion control.

      ORDER CODE: 82400000021600

      SI-Devicenet Communications System Integration Module

      SI-DeviceNet enables follower connectivity. It is possible to use multiple SI-DeviceNet modules to provide additional functionality.

      ORDER CODE: 82400000017700

      SI-CANopen Communication System Integration Module

      SI-CANopen interface module supports various profiles, offering optimum flexibility.

      ORDER CODE: 82400000017600

      SI-Ethernet Communication System Integration Module

      SI-Ethernet can be used to provide high speed drive access, global connectivity and integration with IT network technologies. 

      ORDER CODE: 82400000017900

      SI-EtherCAT Communications System Integration Module

      SI-EtherCAT allows the drive to connect and interface with EtherCAT networks.

      ORDER CODE: 82400000018000

      SI-Profinet Communications System Integration Module  SI-PROFINET
      SI-PROFINET allows the drive to communicate and interface with PROFINET PLCs and networks.

      ORDER CODE: 82500000018200


      SI-INTERBUS 500kBd

      SI-INTERBUS 2MBb               

      SI-INTERBUS for easy integration to the Interbus fieldbus in applications that use or drives

      ORDER CODE: 82400000021220

      ORDER CODE: 82400000021230

      System Integration Modules - Additional I/O

      SI-IO System Integration Module

      Extended I/O interface module to increase the number of I/O points on a drive. Provides additional: 4 x Digital I/O, 3 x Analogue inputs (default)/Digital inputs, 1 x Analogue output (default)/Digital input, 2 x Relays.

      ORDER CODE: 82400000017800

      SI-I/O 24 Plus
      The SI-I/O 24 Plus option module provides a plug in high density I/O expansion solution for Unidrive and Digitax HD. Features include:
      16 x Digital Inputs (8 high speed), 8 x Digital Outputs and an Incremental Encoder Input (AB Servo).
      A High Density DIN rail mounted screw terminal breakout board and cable is available to provide easy connection to the module. 

      ORDER CODE: 82400000022000

      System Integration Modules - Applications
      SI-Apps Compact
      Compatible module allows SyPTPro application programs to be re-complied for HD.

      ORDER CODE: 82400000020700

      MCi200 system integration module
      Second processor, providing advanced customization using industry standard IEC61131-3 programming languages.

      ORDER CODE: 82400000017000

      MCi210 System Integration Module with a dual port Ethernet
      Extended advanced machine control, provides MCi200 functionality with additional ports and simultaneous connectivity to 2 separate Ethernet networks.

      ORDER CODE: 82400000016700

      PTi210 PowerTools Integration Module
      PTi210 allows setup of complex servo motion control applications within minutes

      ORDER CODE: 82400000021400

      System Integration Modules - Safety


      MiS250 safety option extends the built-in STO with motion safety capability and enables decentralised flexibility with the option of safety over ethernet connectivity.

      To find out more, visit our Functional Safety page.

      ORDER CODE: 82400000021100

      Optional Accessories
      RS485 USB Communication Cable
      USB to EIA485 Communications Converter Cable
      The USB comms cable allows the drive to connect to a PC for use with our PC tools*.

      ORDER CODE: 4500-0096

                       digitax m75c capshare servo

      Digitax M75C CapShare

      Capacitor module (200 V and 400 V) with thermal protection to increase maximum energy storage capacity, and optimise energy efficient usage.

      * Also requires KI-Compact-485 adaptor

    • Software & Support
      We make it quick and easy
      Connect - Intuitive Commissioning Software

      Connect is our latest drive configuration tool for commissioning, optimising and monitoring drive/system performance.



      Machine Control Studio - Programming Tool

      Control Techniques' Machine Control Studio provides a flexible and intuitive environment for programming new automation and motion control features.



      Diagnostics Tool

      Diagnostic Tool is a fast and simple tool, which allows users of Control Techniques' drives to quickly solve any error codes that the drive may show.



    • Downloads

    Further Information

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