AP57 Stepper Motor Driver

Pulse & direction stepper motor driver, support to Spontaneous pulses.
Spontaneous pulses Stepper Motor Driver with fixed working speed range.

Driver Overview ● Miniature size 55.9mm × 55.9mm × 19mm

Key Features:

Pulse & direction stepper driver with standard RS232 serial command support
Built-in 32bit digital chip for precise control
Advanced control algorithms for vibration suppression and low heat generation
DC input voltage 20~50VDC (recommended 36VDC)
Continuous output current 4.0A max (peak current 5.6A)
Integrated design for NEMA23/NEMA24 stepper motors
Low vibration, low noise operation with minimal motor heating
Flexible micro-step settings
Comprehensive protection: overvoltage, undervoltage, overcurrent
Built-in automatic motor parameter matching

Driver Dimensions

Driver Connections

Pin Definition Table

Pin No.	Name	Description
1	VDC	Supply voltage: 20-50VDC, Recommend DC36V
2	GND	Supply Voltage Ground: GND/0V
3	RXD	To the RX pin on user device (not for communication, set parameter only)
4	TXD	To the TX pin on user device (not for communication, set parameter only)
5	PUL	Differential PULSE signal input Allow receiving 5V signals, Rising edge effective
6	PUL-
7	DIR	Differential DIRECTION signal input Allow receiving 5V signals, Rising edge effective
8	DIR-
9	ENA	Differential ENABLE signal input Allow receiving 5V signals, Rising edge effective
10	ENA-
11	OUT	Alarm signal output, OC circuit (supports up to 24V)
12	OUT-	Alarm signal output, OC circuit (supports up to 24V)

Important Notes:

Pulse, direction, and enable signals accept up to 5V signals
For 12V control signals: connect a 1KΩ resistor
For 24V control signals: connect a 2.2KΩ resistor

Wiring Methods

AP57 Driver supports multiple connection methods:

Differential Wiring

Connection Methods

DIP Switch Settings

DIP Switch Settings

SW1-SW3: Current setting
SW4-SW6: Micro-step setting
SW8: Rotation direction (CW/CCW)
SW9-SW10: Working mode selection

1. Current Setting (SW1-SW3)

Current Settings

Factory default peak current: 1.5A (adjustable via serial port from 0.1A to 5.6A peak)

Rotation Direction Setting (SW8)

Rotation Direction

SW8=ON: Clockwise (CW)
SW8=OFF: Counter-clockwise (CCW)

Note: Direction can also be changed by swapping phase A/A- or B/B- wiring

2. Working Mode Setting (SW9-SW10)

SW9	SW10	Working Mode
ON	ON	Spontaneous pulses
ON	OFF	Self-test mode
OFF	ON	Double pulse mode
OFF	OFF	Pulse & Direction mode

3.Micro-Step and Speed Setting (SW4-SW7)

Micro-Step Settings

Important: In Spontaneous pulses mode (SW9=ON, SW10=ON), working speed becomes effective when 5V pulse signal is connected.

Spontaneous Pulses Mode

For more detailed information, please feel free to contact us

✉ Email: simon@stepping-motor.cn

📱 Mobile: +86 15656775078