SD17040C Stepper Motor Driver

SD17040C Stepper Motor Driver


  • Powerful 4.0 Arms microstepping driver
  • Compact size (2.1"W x 4.0"D x 6.2"H)
  • Simple and easy set-up via onboard dip switches
  • AC line-powered - NO POWER SUPPLY REQUIRED
  • Switch selectable motor current, 1.0 - 4.0 Amps
  • (16) switch selectable microstep resolutions, up to 50,800 steps/rev.
  • Drives 4, 6, or 8 lead step motors, Nema sizes 23 - 42
  • Automatic idle current reduction, fully programmable
  • Interlock safety feature & short circuit protection 
  • UL Listed


SD17040C user manual










Microstepping Stepper Motor Driver - 4.0 Arms/5.7A peak (115VAC)

The SD17040C surpasses competing stepper drives with a host of features designed to simplify set-up, increase performance, and drive value.

AMCI's SD17040C was designed with you, the customer, in mind. Onboard dip switches simplify set-up & installation, eliminating the need for proprietary software & programming cables; plus field changes are a snap making it easy to reconfigure output current in 0.1A increments or microstepping resolution. Additionally, a selectable self-test feature is provided for troubleshooting your system. And because AMCI's SD17040C is an AC line-powered drive, you don't need a separate power supply, eliminating the cost and complexity of another component in your system. Plus, AMCI's SD17040C stepper drive is 100% compatible with all AMCI stepper controllers and motors, making it easy for you to specify a winning system.

The SD17040C's is an AC line-powered stepper drive, supplying motor current through a 170V bus. The drive's exceptional power combined with anti-resonance circuitry delivers the smoothest, most reliable performance possible in a stepper motor system. This driver also includes an automatic feature to lower motor current anytime the motor is left at rest for more than 1 second.

Configurable features such as microstepping resolution, automatic current reduction, and anti-resonance make it easy to maximize the SD17040C's performance for your application. Plus safety features include an interlock connection to prevent injury if the motor connector is removed while the driver is powered. Additionally, short circuit protection - including phase to phase and phase to ground- and overtemperature circuitry comes standard.

AMCI's SD17040C is a compact, but powerful AC powered 4.0 Arms microstepping motor driver designed with performance and longevity in mind. Reliability is guaranteed. The SD17040C is purpose built for demanding applications, starting with board-level components rated to 105°C (221°F) letting you take full advantage of the drive's compact size.

Unlike most industrial stepper drives with electronics rated to 85°C (185°F), AMCI's SD17040C unit can be installed into tight spaces without thermal issues; supplemental fans or cooling aids are NOT required...AMCI's SD17040C runs cool by design. Plus, you can choose optional panel or side mounting for added flexibility during installation.

Using DSP (Digital Signal Processor) technology enables the SD17040C's sleek, space saving design compared with other drives that rely on bulky, analog-based circuitry. The DSP technology also makes it possible for AMCI to customize the drive's performance. Custom microstepping resolutions or preset motion profiles can be configured without undergoing a product redesign, enabling AMCI to offer unique solutions at competitive prices for volume orders.

AMCI's SD17040C microstepping motor driver delivers unparalleled value, performance, and reliability. Request a quote from AMCI today on this best-in-class stepper driver, priced for a wide variety of applications.

Available Versions

SD17040C: 4 Amp rms (5.6A peak), 170 Volt driver, micro-stepping driver for all AMCI motors
Price | $616/ea

Note: Pricing is US Domestic only



Consult the factory for availability

Contact Sales

Underwriters Laboratories Inc. Listed

 (UL Listed)




Microstepping Stepper Motor Driver - 4.0 Arms/5.7A peak (115Vdc)
Amplifier Type:Bipolar with two MOSFET H-bridges; average current control, 20 kHz PWM
Number of phases:(2)
Supply voltage:95-132 Vac, 50/60 Hz
Indexer / Disable Input Specifications:SD17040C:
Off State Voltage: 0 to 1Vdc
On State Voltage: 3.5 to 27Vdc
Input Requires 10mA of current to operate
Fault output voltage:open collector/emitter 30Vdc max & 20 mA max

Operational Specifications

Microstepping Stepper Motor Driver - 4.0 Arms/5.7A peak (115VDC)
Current rating:4.0 Arms (average current) / 5.7A peak (peak current)

NOTE: There are 2 ways to express the magnitude of current in microstepping stepper motor drivers, RMS and Peak. See tutorial on bottom of page for more information.

1 amp RMS = 1.414 amp Peak.

AMCI's SD17040C stepper motor drive is rated for 4.0 amp RMS or 5.7 amp Peak.
Resolution:16 dipswitch selectable steps/rev: 200, 400, 1000, 2000, 5000, 10,000,
12,800, 18,000, 20,000, 21,600, 25,000, 25,400, 25,600, 36,000, 50,000,
and 50,800. Switch settings are latchable and changes occur when power is cycled
Maximum velocity:motor/load dependent
Maximum input frequency:2MHz
Output current:1.0A - 4.0A rms selectable with latchable dipswitches in 0.1 amp increments
Maximum operating temperature:50°C ambient temperature
Idle current:Four latchable dipswitch selectable options:
- 0% after 1 second without a step pulse
- 50% after 1 second without a step pulse
- 69% after 10ms without a step pulse
- no reduction
Motor connections:eight lead series or parallel, six lead series or center tapped, or four lead motors


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Stepper Motors

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AMCI makes buying PLC-based automation easy...our sales group will help you:

  • Select the right product for your application
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Contact AMCI Sales today:

telephone: 860-585-1254
email: AMCI sales

Ordering Information

AMCI's sales team takes the hassle out of placing your order. We'll advise on product selection, alternatives, lead times, and present you with point of purchase options. Call (860) 585-1254 or email AMCI sales today!

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