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  • Ultra-compact driver measuring a mere 2.2 x 2.9 x 1.86 inches.
  • Bi-polar constant current driver.
  • The micro-stepping feature may be selected from anyone of the following settings: 1/1 (full step), 1/2 (micro-step), and 1/4 (micro step).
  • Through the use of 3-bit external signals, electric current settings may be specified to any one of 8 different settings from 0.44-2.00 A/phase.
  • Input commands may be selected from either direction-of-rotation separate serial pulse signals or a combination of directional signals and pulse signals.
Unit of Measure

Product Type

N/A Stepper Motor


N/A Driver


N/A 2.2 x 2.9 x 1.86 in

Winding Method

N/A Bipolar

Min. High Level Input Voltage (Vih)

N/A 3.5 V

Max. High Level Input Voltage (Vih)

N/A 5.3 V

Min. Low Level Input Voltage (Vil)

N/A 0.0 V

Max. Low Level Input Voltage (Vil)

N/A 0.8 V

Max. Rise Time (Tr)

N/A 25 µs

Max. Fall Time (Tf)

N/A 10 µs

Min. Input Pulse Range (Twl)

N/A 18 µs

Min. Direction of Rotation Change Timing (Twh)

N/A 10 µs

Ambient Temperature (In Operation)

N/A 0 ~ +50 ºC

Ambient Temperature (In Storage)

N/A -20 ~ +60 ºC

Ambient Humidity (In Operation)

N/A 35 ~ 85 %

Ambient Humidity (In Storage)

N/A 35 ~ 85 %

Applicable Motor

N/A KH4234-B951 KH4238-B951 KH4242-B951 KH4248-B951 KH4254-B951


N/A Specified by the voltage waveform between the user circuit ground and the FSD2B2P13-01 terminal


Input Circuit

Accessory-Leadwire Assembly

Connector Specifications

Connector Specifications

Explanation of Dynamic Torque Curves

Functions Setting and Connections (FSD2B2P13-01)

Input Signal and Motor Direction Relation

Input Signal Specifications

Power Supply Specification

Required Operating Environment