AP57 Stepper Motor Controller, Spontaneous pulse driver

Spontaneous pulse driver
$55.00
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AP57 Stepper Motor Controller (Spontaneous Pulse)

Pulse & direction stepper motor driver supporting Spontaneous pulses mode — a mid-power integrated driver with built-in pulse generator for standalone operation without external PLC or motion controller.

AP57 Stepper Motor Controller Spontaneous Pulse
● Miniature size 55.9mm × 55.9mm × 19mm

Product Introduction

The AP57 is a mid-power spontaneous pulse stepper motor driver designed for NEMA23/NEMA24 motors. With a built-in pulse generator, it can operate independently without requiring an external PLC or motion controller. It supports both pulse & direction and spontaneous pulse working modes via DIP switch selection, offering higher current output (up to 5.6 A peak) for larger motor applications.

Product Advantages

  • Pulse & direction stepper driver also supports standard RS232 serial command, with built-in 32-bit digital chip
  • Uses advanced control algorithms for vibration suppression and low heat generation
  • DC input voltage 20~50 VDC, recommended working voltage 36 VDC
  • Continuous output current 4.0 A max, max peak current 5.6 A
  • Integrated design, mountable with NEMA23/NEMA24 stepper motors
  • Low vibration, low noise, stable operation, low motor heating
  • Any micro-step can be set
  • Protection functions: overvoltage, undervoltage and overcurrent
  • Built-in automatic matching function of motor parameters
  • AP57 stepper driver can be assembled for NEMA23 Integrated Stepper Motors

Electrical Characteristics

  • Supply Voltage: 20~50 VDC (recommended 36 VDC)
  • Output Current (continuous): 4.0 A max
  • Peak Current: 5.6 A max
  • Control Modes: Spontaneous pulses, Pulse & Direction, Self-test, Double pulse
  • Communication: RS232 serial (parameter setting only)
  • Micro-step: Any value configurable
  • Dimensions: 55.9 × 55.9 × 19 mm
AP57 Product View
AP57 Diagram

Pin Definition

Pin No.NameDescription
1VDCSupply voltage: 20-50 VDC, Recommend DC 36 V
2GNDSupply Voltage Ground: GND/0 V
3RXDTo the RX pin on user device (not for communication, set parameter only)
4TXDTo the TX pin on user device (not for communication, set parameter only)
5PULDifferential PULSE signal input,
Allow receiving 5V signals, Rising edge is Effective
6PUL-
7DIRDifferential DIRECTION signal input,
Allow receiving 5V signals, Rising edge is Effective
8DIR-
9ENADifferential ENABLE signal input,
Allow receiving 5V signals, Rising edge is Effective
10ENA-
11OUTAlarm signal output, OC circuit, can receive voltage up to 24 V
12OUT-

Note: Pulse signals, directional signals, and enable signals can receive up to 5 V signals.

If the control signal is 12 V, a 1K resistor needs to be connected.
If the control signal is 24 V, it is necessary to connect a 2.2K resistor.

Wiring Configurations

In addition to Differential wiring, AP57 Driver also supports common anode connection and common cathode connection:

Common Anode Wiring

Common Cathode Wiring

DIP Switch Settings

DIP Switch Diagram
  • SW1, SW2, SW3 — Set Current
  • SW4, SW5, SW6 — Set Micro-Step
  • SW8 — Set direction CW/CCW
  • SW9, SW10 — Choose Working Mode

Set Working Current by SW1, SW2, SW3

Current Setting Table

The default peak current at the factory is 1.5 A. It can be set through the serial port before sale.

The adjustable current range is any value between 0.1 A and 5.6 A (peak).

Set Stepper Motor's Default Rotation Direction

  • SW8 = on → CW (clockwise)
  • SW8 = off → CCW (counter-clockwise)
Direction Setting
Note: The default rotation direction depends on wiring. Swapping wiring phase A A- (or B B-) will change the rotation direction.

Set Working Mode by SW9, SW10

SW9SW10Working Mode
ononSpontaneous pulses
onoffSelf-test
offonDouble pulse
offoffPulse & Direction

Set Micro-Step and Working Speed by SW4, SW5, SW6, SW7

Micro-Step Setting Table
Note: Set SW9, SW10 for Spontaneous pulses mode. Working speed will be effective when connecting the 5V pulse signal.
Spontaneous Pulse Speed Settings

Application Scenarios

  • Standalone automation — No PLC or motion controller needed; built-in pulse generator provides fixed-speed continuous rotation
  • Conveyor systems — Stable low-speed/high-torque operation with adjustable speed via DIP switch
  • Linear motion stages — Compact form factor ideal for NEMA23/NEMA24 integrated motor assemblies
  • Packaging machinery — Higher current capacity (5.6 A peak) suits medium-power industrial applications

More Information on detail, please feel free to contact me

AP57 Stepper Motor Driver User Manual Download Manual

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