MKS SERVO42D RS485-MB Closed-Loop Stepper Motor Board: NEMA17 controller with FOC, RS485 bus support, MODBUS-RTU, 6 working modes (pulse/serial, open/closed/FOC), adjustable 1–256 microstepping, max 3000 RPM, low vibration/noise, aluminum shell, includes accessories (screws, magnet, gasket, jumper, cable, APT, heat pad).
The MKS SERVO42D RS485-MB is a closed-loop stepper motor controller board for NEMA17 motors, designed for 3D printers, CNC machines, and automation systems. It uses Field-Oriented Control (FOC) for smooth, efficient operation with low vibration and noise. This RS485 version supports MODBUS-RTU over RS485 for reliable communication in industrial networks.
Specifications:
- Board Type: MKS SERVO42D_RS485
- Microprocessor: N32L403 (Cortex-M4)
- MOSFET: AP4008QD (40V, 20A)
- Encoder: 14-bit magnetic encoder
- Working Voltage: 12–24V DC
- Working Current: 0–3000 mA (adjustable)
- Update Frequency: Torque 20 kHz, Velocity 20 kHz, Position 20 kHz
- Maximum Speed: 3000 RPM+
- Subdivision (Microstepping): 1–256 (default 16)
- Motor Vibration: Low
- Motor Noise: Low
- Motor Temperature: Low
- Pulse Signal: Positive common
- Pulse Signal Frequency: Max 160 kHz
- Interface Transceiver: MAX13487E
- Interface Rate: 9600 / 19200 / … / 115200 / 256000
- Interface Addressing: 1 broadcast address, up to 2047 slave addresses
Features:
- Support 6 working modes: Pulse interface (Open loop, Closed loop, FOC Mode) and Serial Interface (Open loop, Closed loop, FOC Mode)
- Support RS485 Interface
- Support MODBUS-RTU communication protocol
- Support Curve Acceleration and Deceleration
- Support Limit switch for returning to zero
- Support Speed mode, Relative position, and Absolute position control mode
- Support 1–256 arbitrary subdivision and configurable working current
- Maximum input pulse frequency: 160 kHz; Maximum speed: 3000 RPM
- Support multiple motor synchronous working modes
- Aluminum alloy shell for heat dissipation and durability
Applications:
- 3D Printers (Voron, Creality, and other custom setups)
- CNC engraving machines
- Robotics and automation projects
- Industrial control systems
- Educational and research applications
Included Accessories:
- 1x MKS SERVO42D RS485 MB (board only, motor not included)
- 4x Cross screw (M3-45mm)
- 1x 6×2.5 Radial Magnet
- 4x ABS Gasket (3mm)
- 1x Mini jumper 2.0 PINHD-2x1 (Closed, Height 5.0mm)
- 1x Cable XH2.54 – 6-pin, 100 cm (single end tinned 5 mm)
- 1x MKS APT
- 1x Aluminum shell
- 1x Heat dissipation silicone pad
