C82 Dual Port Multifunction CNC Breakout Board for Ethernet SmoothStepper / Ether-Mach Controllers

The C82 Dual Port Multifunction Board is designed to make wiring and controlling a CNC machine easier when using an Ethernet Smooth Stepper (ESS) or Ether-Mach motion controller. Instead of wiring directly into the motion controller, the C82 gives you organized screw terminals, relay outputs, spindle control, safety monitoring, and input/output connections in one clean interface board.

This board is a strong choice for CNC builders who want a more complete control setup with room for spindle control, E-stop wiring, limit/home switches, driver fault monitoring, and relay-controlled accessories.

Key Features

• Designed for Ethernet Smooth Stepper and Ether-Mach controllers
  • Provides a clean breakout/interface board for CNC motion-control systems using ESS or Ether-Mach hardware.
• Dual-port access for expanded CNC control
  • Gives access to more I/O than a simple single-port breakout board, making it better suited for machines with more switches, relays, sensors, or control features.
• Built-in spindle speed control
  • Includes PWM-based speed control, useful for controlling compatible VFD/spindle setups through your CNC control software.
• Two built-in electromechanical relays
  • Relays include Normally Open (NO) and Normally Closed (NC) positions.
  • Useful for spindle control, coolant, vacuum, dust collection, or other machine accessories.
• Safety and fault monitoring
  • Designed to monitor important CNC safety signals including:
    • E-Stop
    • Safety Charge Pump
    • VFD fault
    • Driver fault
• Optoisolated inputs
  • Helps protect the control electronics by electrically isolating input signals.
  • The manual lists optoisolated inputs working at 5–24VDC.
• Flexible input/output logic
  • Supports discrete input and output connections for CNC switches, relays, sensors, and other machine-control devices.
  • Outputs can be configured depending on the control setup, including open-collector or TTL-style output behavior according to the manual summary.
• Safety Charge Pump support
  • The board uses a microcontroller-based Safety Charge Pump system.
  • This helps make sure the machine control board only activates when the CNC software is actively running and communicating properly. CNC4PC’s Mach3 setup guide describes the charge pump as a watchdog that allows the board to activate only while the control software is active.
• Status LEDs on inputs and outputs
  • Built-in indicator lights make wiring, setup, and troubleshooting easier.
• DIN rail mountable
  • Designed for cleaner installation inside a CNC control cabinet.
• Pluggable screw terminals
  • Makes wiring easier and more serviceable compared with fixed terminal blocks.
• Compatible with C34 connector boards
  • Works with CNC4PC’s C34 connector board family for easier connection to popular stepper and servo drives.
  • This can simplify wiring for step/direction, enable, and fault signals.
• External power required
  • The manual states the board requires an external power supply between 10–30VDC at 700mA to power the board logic and connected ESS or Ether-Mach controller.