STM57PI (Closed-Loop Pulse Control) Integrated 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
Models & Specifications
| 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 |
| 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 and sink types; All use high-speed optocouplers, supporting PNP and NPN; Used as pulse input channels: DI1: Pulse input (PUL); DI2: Direction input (DIR); DI3: Enable (EN); PI: 24V pulse input: Threshold level: ON state: 15VDC (5mA) ~ 30VDC (10.5mA); OFF state: 0~5VDC (1.3mA); Uses high-speed bidirectional optocoupler, supports PNP, NPN, push-pull signal input; PIL: 5V pulse input: Threshold level: ON state: 5VDC ±20%, current 7mA; OFF state: 0~2VDC; Uses high-speed unidirectional optocoupler, 5V differential, single-ended, supports PNP, NPN, push-pull signal input |
| 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 |
Torque-Speed Characteristics
STM5741A-485-PI/PIL-XX
STM5756A-485-PI/PIL-XX
STM5776A-485-PI/PIL-XX
STM57B5A-485-PI/PIL-XX
Product Details
STM57PI series pulse control (closed loop) integrated stepper motor is a low-power stepper product independently developed by NiMotion. The product adopts an advanced closed-loop control system and a highly integrated design concept, integrates a stepper motor, encoder, driver and digital IO, and is controlled by a pulse signal. It has the characteristics of compact size, simple wiring, reverse power connection protection, and safe and reliable operation.
Product Features
Highly integrated design
Integrates Stepper motors, encoders, drives and digital IO into a single compact unit, so no external drive is required. Compared with conventional separated solutions it saves considerable installation space, needs less wiring, and makes commissioning and maintenance easier.
High Precision Encoder Feedback
Built-in 14-bit high resolution encoder provides real-time position and speed feedback for more accurate closed-loop control, ensuring smoother operation and more accurate positioning.
Multi-bus communication support
Supports Modbus communication, allowing quick connection to mainstream PLCs, motion controllers and host systems, with flexible networking and easy expansion.
Multiple control modes
Support pulse/direction control, can be flexibly controlled by bus, I/O and pulse mode
Wide Voltage Input
Wide input voltage range of 12-36 VDC, suitable for various power-supply environments and giving greater flexibility in system integration and retrofitting.
Complete diagnosis and protection
Comprehensive diagnostics and protection covering over-voltage, under-voltage, over-temperature, stall, overload, over-speed, over-travel and homing timeout, with current and historical alarm records for safer operation.
Overall Dimensions
Base width: 57mm, X represents the body length. Please click the "Download" section below to view detailed drawings.
Downloads
Companion Products
USB to RS485 converter with active termination, isolation, IP65 protection, and secondary development SDK support.
Applications
Discover how this product is applied across various industrial automation scenarios.
Compatible Products
Build complete and reliable solutions with our compatible products.
Technical Resources
Technical guides, application notes, and more to help you get the most out of the product.
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