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specification.md

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CLN234-V0.1 Specification

⚡ Electrical characteristics

  • Input voltage: 6-52VDC with overcurrent protection, reverse polarity protection and surge protection
  • Current requirements: 10ARMS with up to 20A peak current
  • Powering options:
    • P5.08 screw terminal / Pluggable screw terminal system
  • System voltage source:
    • On-board DC-DC converter
    • USB Type-C connector (5VDC 1.5A limited by design)

🔄 Motor Driving Control Capabilities

  • Supported motor type: Dual DC, Steppers, BLDC, PMSM
  • Supported NEMA motors: NEMA23, NEM34, NEMA42, other
  • Maximum phase current:
    • 10ARMS per phase continuously
    • 13ARMS per phase with 50% duty cycle (period 1s)
    • 20A peak per phase
  • Maximum output voltage: 52VDC
  • Maximum step sub-division resolution: 1/512 of full step
  • Energy saving features: Passive Braking, Freewheeling and automatic power down
  • Working frequency: up to 83kHz PWM
  • Phase channel resistance: Mosfets RDSON 20mΩ for both sides + 2.5mΩ current sensing resistor
  • Encoder position feedback resolution: 16bit/21bit per full rotation or 0.005° at 20kHz update rate
  • Diagnostic functions: overheat detection, short-circuit detection, under-voltage detection, open-load detection

🖥️ MCU Performance and External interfaces

MCU: High-performance Arm Cortex-M4 MCU STM32G431CB running at 170MHz with:

  • 128KB Flash memory and 32KB SRAM memory and 1Kb OTP
  • Math accelerator with trigonometric functions calculations support;
  • True random number generator
  • Internal HSI and RTC with external oscillator option

Interfaces:

  • USB2.0 for PC communication
  • CAN-Bus with CAN-FD support for high-speed or long-range wired connection with daisy chain connection option

  • SWD programming interface with debug over SWO trace

  • First 5-Pin CTRL connector PH2.0:

    • Classic EN/DIR/STEP interface with ERR line
    • USART (Single wire, Asynchronous, Synchronous)
    • SPI or SSI
    • ABZ incremental interface for external encoder connection with program-controlled 5V voltage source

  • Second 5-Pin CTRL connector PH2.0:

    • Classic EN/DIR/STEP interface or DIR/STEP with ERR line
    • I2C
    • ABZ incremental interface for external encoder connection

  • 4-Pin expansion connector 2x2P2.0 with 2A power line and multifunctional bidirectional fast 2-Pin interface up to 8MHz with Classic UART interface

I/O protection features:

  • ESD protection (persistent against electrostatic discharge)
  • USB, SWD and control interfaces are 5V-tollerant
  • Reverse polarity signal protection
  • Overcurrent protection

User interaction:

  • Reset button

📏 Mechanical data

  • Size dimensions:

    • PCB outline: 54x54mm (adapted for NEMA23 form factor)
    • PCB circumcircle radius: 60mm
    • PCBA Height: 15mm

  • Weight:

    • 8g board only
    • 18g board with mount
    • 24g with low-profile aluminum housing
    • 28g with full-size aluminum housing

🔥 Operating conditions

  • Working temperature range: -25 to +80 degrees Celsius
  • Environment humidity range: 0 to 90%
  • Environmental safety: potential Lead-Free and RoHS compliance
  • Maximum heat dissipation: 20W from motor driver and 0.5W from other system