High Precision SL2690A Stepper Driver Manufacturer

Description

One of the key advantages of the SL2690A Stepper Driver is its intelligent microstepping technology. By supporting multiple microstep resolutions, the driver enables smoother motion, improved positioning accuracy, and quieter operation compared to conventional analog drivers. The optimized anti-resonance control further minimizes mechanical vibration and eliminates low-speed oscillation, resulting in more stable machine performance.

The driver incorporates industrial-grade electronic components and advanced PCB manufacturing processes to ensure long-term durability under demanding operating conditions. High-speed optically isolated input circuits improve signal integrity and protect the control system from electrical interference. Integrated protection functions including over-voltage protection, over-current protection, phase short-circuit protection, and over-temperature monitoring enhance operational safety and extend system lifespan.

Manufactured using precision SMT assembly technology and subjected to comprehensive quality inspection procedures, every SL2690A Stepper Driver undergoes electrical performance verification, load testing, thermal testing, and reliability evaluation before shipment. This strict quality control process ensures consistent performance in continuous industrial operation.

Combining precision motion control, flexible configuration, excellent noise suppression, and dependable industrial reliability, the SL2690A Stepper Driver is an ideal choice for engineers and equipment manufacturers seeking a cost-effective and high-performance stepper motor control solution for modern automation systems.

SL2690A Stepper Driver Technical Specifications

Product Model: SL2690A Stepper Driver

Driver Type:Fully Digital Stepper Motor Driver

Applicable Motors: 2-Phase Hybrid Stepper Motors

Input Voltage Range: 24VDC – 90VDC

Recommended Operating Voltage: 36VDC – 80VDC

Output Current Range: 1.0A – 9.0A Peak (Adjustable)

Continuous Output Current: Up to 6.3A RMS

Control Signal Input: Pulse/Direction (PUL/DIR)

Logic Signal Voltage: 5V – 24V Compatible

Microstep Resolution Options:

400 pulses/rev
800 pulses/rev
1600 pulses/rev
3200 pulses/rev
6400 pulses/rev
12800 pulses/rev
25600 pulses/rev
Custom electronic subdivision supported

Maximum Pulse Frequency: 300 kHz

Current Reduction Function: Automatic idle-current reduction

Anti-Resonance Technology: Integrated digital resonance suppression

Motor Compatibility:

NEMA 23 Stepper Motors
NEMA 34 Stepper Motors
High-Torque Hybrid Stepper Motors

Input Isolation: High-speed optocoupler isolation

Control Modes:

Position control
Speed control
Point-to-point motion control

Protection Features:

Over-voltage protection
Under-voltage protection
Over-current protection
Phase short-circuit protection
Reverse polarity protection
Over-temperature protection

Efficiency: Up to 97%

Signal Response Time: ≤2 μs

Status Indicators: Power, Pulse, Alarm LEDs

Cooling Method: Natural convection with aluminum heat dissipation structure

Operating Temperature: -10°C to +50°C

Storage Temperature: -20°C to +70°C

Humidity Range: 20% – 90% RH (non-condensing)

Vibration Resistance: Industrial-grade anti-vibration design

Mounting Method: Panel-mounted installation

Housing Material: Aluminum alloy casing

Protection Rating: IP20

Service Life: ≥30,000 operating hours

Typical Applications:

CNC routers and milling machines
Laser cutting and engraving systems
Automated assembly equipment
Packaging machinery
Textile automation systems
Semiconductor manufacturing equipment
Precision positioning platforms
Industrial robotics
Material handling systems
Inspection and testing equipment

Perormance index：
1.electric index:
Explain	SL2690A、SL2690DA
Explain	min value	Typical value	Max value	Unit
Output current (peak value)	2.2	–	6.5	A
Supply Voltage	18	60	90	VDC
Supply Voltage	18	60	90	VDC
control signal current	5	10	16	mA
Stepping pulse frequency	0	–	300	KHz
Stepping pulse width	2	–	–	us
Direction signal width	100	–	–	us
Under voltage protection point	–	17.5	–	VDC
Over voltage protection point	–	200	–	VDC
Drive initialization time	2	–	–	s
Insulation resistance	500	–	–	MΩ

2.Environmental index
Type of cooling		Natural cooling or forced air cooling
Environmental conditions	Occasion	Can’t be put it next to other hot equipment,avoid dust, oil, corrosive gas, humidity and strong vibration places,no combustible gas and conductive dust
	Temperature	0~+50°C
	Humidity	40~90%RH
	Vibration	10~55Hz/0.15mm
Storage temperature		（-20°C~65°C）
Weight		350g

SL2690A Current and subdivide setting
SW1	SW2	SW3	SW4	SW5	SW6	SW7	SW8	SW9	SW10
Subdivide setting				Current setting				Continuous self running
Operation mode	Single pulse			Double Pulse		Controlled self operation		Continuous self running
SW9	OFF			ON		OFF		ON
SW10	OFF			OFF		ON		ON

COM port and connection
Name		Function
PUL+(CW+)		Pulse input signal: The pulse effective edge is adjustable,default pulse rising edge is valid; In order to reliably respond to the pulse signal , the pulse width should be greater than 1.2µs.Input voltage range:3.3~28V. Double pluse mode(under) : CW
PUL-(CW-)
DIR+(CCW+)		Direction input signal:High/low electrical level signal, in order to ensure reliable motor reversing, the direction signal should be established at least 5µs before the pulse signal.The initial running direction of the motor is related to the wiring of the motor windings. The direction of the initial running of the motor can be changed by interchanging any one-phase winding (such as A+ and A- exchange). Double pluse mode(under) : CCW
DIR-(CCW-)
ENA+(ALM+)		Enable control signals:this input signal is used to enable or disable drive output.ENA connected to the low level (or internal optocoupler turns on), the driver will cut off the each phase of the motor current, make the motor in a free state and can’t be respond to the stepping pulse.When this function is no needed, suspended the enable signal terminal is OK.Input voltage range :3.3~28V. Can be according the customer’s requirements to set as a alarm output terminal or running speed adjusted output terminal
ENA-(ALM-)
GND		Direct current source
VCD		DC power positive,Range :+18~+90V,recommend +60V
A+,A-		A phase of winding motor
B+,B-		B phase of winding motor
Remark: The pulse, direction and enable terminals all have constant current input functions, allowing direct connection of input signals, no need add a series resistor step-down current limiting protection.