STM57

STM57PI Integrated Pulse-controlled Stepper Motor

57mm flange integrated stepper motor – seamlessly combines stepper motor, driver, controller, and I/O interfaces into a single unit. Reduces wiring, lowers failure points, ensures stable motion, and is suitable for a wide range of small to medium automation equipment.

Features

Pulse/RS485 bus control
Closed-loop control with 14-bit encoder
Supports DI and DO control

RS485 Pulse 57mm

Models & Specifications

Specs as rows · Models as columns

Specifications	STM5741A-485-PI-0FS	STM5756A-485-PI-0FS	STM5776A-485-PI-0FS	STM57B5A-485-PI-0FS	STM5741A-485-PIL-0FS	STM5756A-485-PIL-0FS	STM5776A-485-PIL-0FS	STM57B5A-485-PIL-0FS
Flange Size	57mm	57mm	57mm	57mm	57mm	57mm	57mm	57mm
Holding Torque	0.55 N·m	1.26 N·m	1.80 N·m	3.00 N·m	0.55 N·m	1.26 N·m	1.80 N·m	3.00 N·m
Brake	No Brake	No Brake	No Brake	No Brake	No Brake	No Brake	No Brake	No Brake
Open-Loop/Closed-Loop	Closed-loop	Closed-loop	Closed-loop	Closed-loop	Closed-loop	Closed-loop	Closed-loop	Closed-loop
Encoder Type	14-bit single-turn absolute magnetic encoder	14-bit single-turn absolute magnetic encoder	14-bit single-turn absolute magnetic encoder	14-bit single-turn absolute magnetic encoder	14-bit single-turn absolute magnetic encoder	14-bit single-turn absolute magnetic encoder	14-bit single-turn absolute magnetic encoder	14-bit single-turn absolute magnetic encoder
Rated Voltage	24 VDC	24 VDC	24 VDC	24 VDC	24 VDC	24 VDC	24 VDC	24 VDC
Voltage Range	12-36VDC	12-36VDC	12-36VDC	12-36VDC	12-36VDC	12-36VDC	12-36VDC	12-36VDC
Rated Current	2.8 A	2.8 A	2.8 A	2.8 A	2.8 A	2.8 A	2.8 A	2.8 A
Inertia	1.2×10^-5 kg·m²	3.0×10^-5 kg·m²	4.8×10^-5 kg·m²	8.0×10^-5 kg·m²	1.2×10^-5 kg·m²	3.0×10^-5 kg·m²	4.8×10^-5 kg·m²	8.0×10^-5 kg·m²
Body Length	61 mm	76 mm	96 mm	132 mm	61 mm	76 mm	96 mm	132 mm
Weight	0.49 kg	0.71 kg	1.05 kg	1.67 kg	0.49 kg	0.71 kg	1.05 kg	1.67 kg

* Scroll horizontally within the table area when the content is wide.

Specifications

Shaft Diameter	Φ8
Number Of Phases	2
Step Angle	1.8°
Encoder Introduction	14-bit absolute magnetic encoder
Subdivision	Configurable via DIP switch
Control Modes	Manufacturer Mode,Position Mode,Velocity Mode,Homing Mode
External Control Interface	DI – Non-isolated NPN Input,DI – Non-isolated PNP Input,DI – Non-isolated Switch Input,DO – Isolated Open-Drain Output,DO – Non-isolated MOSFET Output
CiA402 Mode	-
DI (Digital Input)	Quantity: 3, high-speed isolation, compatible with source type and drain type, all adopt high-speed optocouplers, supporting PNP and NPN; 5V and 24V pulse inputs Function: Used as a pulse input channel: DI1: Pulse Input (PUL)DI2: Direction Input (DIR) DI3: Enable (EN)
DO (Digital Output)	Quantity: 2, high-speed isolation, output mode: open-drain output, external voltage allowable range: 15~30VDC, single-channel output current: less than 150mA, configurable functions: 1. The goal has been reached. 2. Alarm output (When the motor status meets the above conditions, the DO switch quantity status changes)
DX (Digital Input / Output)	-
AI (Analog Input)	-
Operating Temperature	0°C to 40°C
Operating Altitude	<1000m
Fault Alarm	Overvoltage, undervoltage, overtemperature, locked rotor, storage fault, over-limit

Downloads

Name	Type	Size	Update Date
NiMotion Integrated Motor Selection Guide	Selection Guide	12.8MB	2026-08-25
Motor Tuning Software – Stepper 485 Communication	Software	22.8MB	2026-08-27
Communication Manual – stm57pi-Modbus	Communication Manual	901.6KB	2026-08-25
stm57pi-series-pulse-control-User Manual	User Manual	6.7MB	2026-08-17
stm57xx-xxx-pi-0fs-integrated-stepper-motor	Drawing	327.0KB	2026-07-28

Companion Products

Power CableSTX001 Power Cable

Power cable for NiMotion integrated motors.

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Communication ConverterSCM-USB485A-L

USB to RS485 converter with active termination, isolation, IP65 protection, and secondary development SDK support.

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I/O CableSTX004 IO Cable

IO cable for NiMotion integrated motors.

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Applications

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Application of integrated servo motor in pendulum wheel sorting machine

With the rapid development of logistics and manufacturing industries, sorting machines are being used more and more widely. As a common sorting equipment, the pendulum wheel sorter is highly efficient, accurate, and flexible, and is widely used in various logistics sorting scenarios. The application of integrated servo motors in the pendulum wheel sorter provides new possibilities for performance improvement and optimization of the sorter.

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Application of integrated servo motor in extracorporeal vibrating lithotripsy bed

With the continuous advancement of medical technology, the extracorporeal vibrating lithotripsy bed, as a non-invasive stone treatment device, has been widely used in the medical field. The integrated servo motor, as the core driving component of the extracorporeal vibrating lithotripsy bed, provides safer and more reliable technical support for the treatment of stone patients with its high efficiency, stability and precision.

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Application of integrated servo motor in venous center robotic arm

With the continuous advancement of medical technology, robot-assisted surgery has become an important development direction in the field of modern medicine. Among them, the venous center robot arm, as a key component of the surgical robot, plays a vital role in the accuracy, stability and safety of the operation. As one of the core components of the robot arm, the integrated servo motor is also gaining more and more attention in the application of the venous center robot arm.

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Application of integrated servo motor in AGV

Automation technology has leapt forward, and the popularity of automatic guided vehicles (AGVs) in logistics, warehousing and production has accelerated. As a key equipment in intelligent logistics, AGVs use electrical control, sensing and navigation technologies to achieve automatic handling and precise positioning of goods. The integrated servo motor, as its power heart, is crucial to the performance of AGVs.

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Application of integrated servo motor in tension system equipment

With the rapid development of industrial automation, the demand for high-precision and high-efficiency transmission and control equipment is growing. As an intelligent motor integrating drive, control and feedback, the integrated servo motor has been widely used in various industrial equipment due to its excellent performance. Especially in tensile test equipment, the integrated servo motor plays a vital role.

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Application cases of integrated stepper servo motors in fluid equipment in the spraying industry

The application of integrated stepper servo motors has achieved precision and efficiency in the spraying process. The combination of CANopen communication and intelligent control algorithms has solved the pain points of traditional spraying equipment, such as large flow fluctuations and delayed response, and significantly improved coating quality and production efficiency.

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Application of integrated stepping servo motor in microscope stage

Microscopes are indispensable tools in scientific research and medical diagnosis, and their accuracy and stability are crucial to the observation results. The stage, as an important part of the microscope, carries the sample to be observed, and its movement accuracy and response speed directly affect the observation effect.

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Application and optimization of integrated servo motors in appearance inspection equipment

This article aims to introduce the application scenarios, technical features, challenges and solutions of integrated servo motors (PMMP4010B-CANpen) in appearance inspection equipment. Through actual case analysis, the key role of motors in improving the accuracy and stability of inspection equipment is demonstrated.

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Application of integrated servo motor in intelligent (automatic) charging equipment

With the widespread promotion and popularization of new energy vehicles, the demand for charging equipment is also growing. In order to improve the efficiency and performance of charging equipment, integrated servo motor technology is widely used in new energy vehicle charging equipment. Integrated servo motor technology combines the functions of motor, controller, sensor, etc., with the advantages of high efficiency, precision and intelligence, bringing revolutionary changes to the charging equ

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