Stepping motor driver: EC-AD series

The drivers support EtherCAT, CiA402 drive profile, and PP mode, and are capable of DC (Distributed Clock) synchronization: High-speed response at 250 μs cycles. The motion control core is equipped with a NPM's pulse control LSI, which performs acceleration/deceleration positioning, homing, etc. inside the boards according to the commands from upper controllers. The drivers are also capable of counting the mechanical position by encoder inputs. They drive 1- and 4-axis, bipolar /unipolar, 2-phase stepping motors up to 3.0 A/phase with a constant current, and they have functions such as variable motor torque by intelligent current control suitable for operation and micro-step operation up to 1/32 devison.


  • EtherCAT
    • Supported communication protocol: CoE (CANopen application protocol over EtherCAT), FoE (File Access over EtherCAT)
    • Control profile: CiA402 drive profile
    • Operation mode: PP (Profile position) mode / HM (Homing) mode
    • Synchronous mode: DC (Distributed Clock) synchronous 250us or longer / FreeRun
  • Motion control
    • Motion control core: NPM pulse control LSI, PCL series)
  • Driver
    • Applicable motor: 2-phase unipolar / bipolar stepping motor
    • Control method, output current: Constant current drive, 0.1 A to 3.0 A / phase (in 0.1A units)
    • Excitation method: Micro step control (1/1, 1/2, 1/4, 1/8, 1/16 and 1/32)
    • Motor drive current control: AGC (Active Gain Control) control / intelligent current control
    • Error detection: Over-current, over-heating, load-open, moto-power down
    • Drive parameter: Set by SDO (Service Data Object) communication
  • Signal
    • Input: Emergency stop / ± End limit / Origin / Encoder A phase, B phase, Z phase
    • Output: Comparator
  • Power supply
    • Supply voltage [V]: DC +12 V to +24 V ± 10 % (Control power supply / motor drive power supply, separate input)
  • Environment
    • Compliant standard: RoHS Directive 2011/65 /EU (including 4 additional substances in 2015/863/EU)


Stepping motor driver: EC-AD series


Nippon Pulse Motor (NPM)

Nippon Pulse Motor Co., Ltd.