Press Release

New Driver Unit for Megatorque Motor™ PS/PN Series

“EDD Driver Unit” offers improved usability

NSK Ltd. (NSK; Headquarters: Tokyo, Japan; President & CEO: Toshihiro Uchiyama) has released a refreshed driver unit for Megatorque Motor PS/PN Series. The new driver will be exhibited at NSK's booth at International Robot Exhibition 2019 from December 18-21.

Previous model: EDC Driver
New model: EDD Driver

The EDD model maintains broad interchangeability and functional compatibility with EDC driver units. The popular EDC model, first released in 2007, was rapidly adopted by semiconductor and electronics manufacturers for its highly reliable and accurate performance. The EDD model is an update refreshing the internal electronics to secure supply chain stability of essential components and improve safety and ease of use.

New Driver Unit for Megatorque Motor PS/PN Series

Model Selection Moving Forward

The EDD model driver unit succeeds the EDC model for standard configurations.

EDC Driver Available to support CC-Link and MECHATROLINK-Ⅲ functionality.
EDD Driver
(New model)
For all other configurations.

*We recommend the EDD model unless using CC-Link or MECHATROLINK-Ⅲ.


1. Interchangeability with EDC Model
  • Same external dimensions (same attachment dimensions).
  • Supports current positioning command systems and input/output signals.
2. Improved Safety
  • Updated connector design to prevent improper insertion. Also includes a locking mechanism to help prevent accidental detachment (unplugging). EDD models accordingly use a new cable set.
3. Improved Usability
  • Updated and unified power supply to a single phase 100-240 [VAC] unit. (Previously was two models: single phase 200-230 [VAC] and 100-115 [VAC].)
  • Analog control input is now standard on EDD model. Can control speed and torque.
  • Pulse train position command maximum input frequency increased to 2 MHz (previously 1 MHz) enabling even quicker high-accuracy positioning during high speed operation.
  • Added USB connector to link with a computer installed with “EDD Megaterm” software. The new EDD software supports high speed oscilloscopes and FFT, and has been updated overall to make it easier to control, edit, and tune settings. Note: The launch of the English version of EDD Megaterm has been delayed and has been rescheduled in August 2020. (Revised July 2020).


The EDD driver unit is now available.

The EDD driver unit is now available.

About NSK

NSK started its journey manufacturing the first bearings in Japan in 1916, and has since developed into a global organization researching, designing, and manufacturing Motion & Control™ solutions supporting essential mobility and industry applications. NSK is currently the top supplier of bearings in Japan, and is the third largest supplier in the world by market share.

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