This new high-end motion controller is designed for use with CNC’s, Delta Robots, Polar Robots, and other similar pieces of equipment with up to four axes of motion.  Similar to the M3521, this LITE version also uses dedicated cables, in this case to four motor drives, and includes industrialized I/O as well as serial and Ethernet host communications.  The unit’s Modbus -485 Tool Header facilitates quick integration of motor inverters, plasma controllers, or other similar equipment.  The multiple EIA communications ports connect operator interface devices, a hand-held pendant, or other similar ancillary equipment.

key features:

  • Up to Four (4) Axis of Motion Control

  • Advanced Motion Control Functionality

  • Ethernet Connectivity

  • Two (2) + Four (4) EIA Ports

  • Four (4) On-Board Outputs & Eleven (11) Inputs

Supported motion:

  • Coordinated Motion

  • Linear, Circular, and Smooth-Curve Interpolation

  • Linear and S-Curve Accelerations

Axis of Motion:

  • Four (4) Motor Drive Connections. Each Includes:

    • Differential Step/Dir Output or Encoder Input

    • One (1) Single-Ended TTL Step/Dir Output

    • One (1) “Drive Enable” Output

    • One (1) “Drive Fault” Input

Inputs and outputs:


  • Four (4) Discrete PNP Outputs


  • Nine (9) Discrete Inputs for PNP Sources

  • Two (2) Discrete Inputs for NPN Sources

The M3521 LITE Motion Controller


  • Ethernet TCP/IP -- 10/100 Mb

  • EIA-232 Host Ports

    • Servo/Drive Interfaces

    • Keypad Pendant

    • Data

  • Two MODBUS® Compatible EIA-485 Communications Ports

  • Optional USB host port for memory expansion, or serves as a general utility interface

Software Support:

The M3521 can be programmed and driven by a wide variety of languages, including very elementary ones like BASIC. Or, the unit can be programmed with a specifically designed, commercial-off-the-shelf package in ExtraTech’s powerful Coreo platform.  Among other reach features, Coreo allows easy programming of coordinated motion, multiple types of interpolation, and sophisticated accelerations.


  • Uses RPC core methodology, for future CPU replacements

  • Dimensions: 22.5 x 20 x 4cm (9 x 8 x 1.75in)

  • Power Requirements: External 12VDC – 24VDC

Specialty connections:

  • Specialized Headers – for (Cutting) Tool Connections

    • Useful for:

      • Inverters

      • Plasma Head

      • Spindle

    • Includes:

      • MODBUS® Compatible Communications

      • One (1) “Enable” Output

      • One (1) “Fault” Input

      • One (1) Misc. Input

      • One (1) 0-10VDC Analog Input


If you're an OEM seeking a motion controller of a caliber seen on this page, have an annual usage of over 50 units, and are seeking a relationship with a trusted supplier with more than 25 years industry experience, please feel free to contact us and let us know if there’s something that we can do for you.