UC300ETH + C76 Ethernet CNC Controller Bundle for Mach3, Mach4 & UCCNC

UC300ETH + C76 Ethernet CNC Controller Bundle

This UC300ETH + C76 bundle pairs the UC300ETH-5LPT Ethernet CNC motion controller with the C76 multifunction breakout board to create a cleaner, more complete CNC control solution for Mach3, Mach4, and UCCNC systems. It is built for CNC routers, mills, plasma tables, retrofits, and DIY CNC control cabinets that need reliable Ethernet motion control, organized wiring, spindle control, relay control, and expanded machine I/O.

Quick Answer

• What it is: A CNC controller bundle that includes the UC300ETH Ethernet motion controller and the C76 UC300ETH multifunction breakout board.
• What it does: Provides Ethernet CNC motion control, 6-axis step and direction capability, organized I/O wiring, spindle control, relays, and optoisolated input connections.
• Best for: CNC routers, CNC mills, plasma tables, DIY CNC builds, and CNC machine retrofits using Mach3, Mach4, or UCCNC.
• Why buy the bundle: The UC300ETH handles motion control, while the C76 makes wiring cleaner, safer, and easier inside a CNC control cabinet.
• Important: This bundle still requires compatible CNC software, power supplies, motor drivers, wiring, and correct machine configuration.

What Is Included?

• UC300ETH-5LPT Ethernet CNC Motion Controller: The main motion controller that communicates with the control PC over Ethernet and outputs step/direction control signals.
• C76 UC300ETH Multifunction CNC Breakout Board: The interface board that gives the UC300ETH organized terminal access, spindle control, relay outputs, optoisolated I/O, and control cabinet wiring support.
• Documentation links: Product manuals and software download links are included below for setup reference.

Why This Bundle Makes Sense

Buying the UC300ETH controller by itself gives you the motion control brain, but you still need a clean way to wire the machine. The C76 solves that problem by turning the UC300ETH connection into a more practical CNC control cabinet layout with terminals, relays, spindle control, optoisolated inputs, expansion ports, and safety signal wiring.

• Cleaner wiring than using the motion controller alone
• Better fit for professional CNC control cabinet builds
• Supports spindle control, relay control, safety monitoring, and machine I/O
• Reduces confusion when wiring drives, switches, relays, VFD signals, and fault circuits
• Good upgrade path for older parallel-port-style CNC systems
• Better product match than making customers figure out the controller and breakout board separately

UC300ETH Controller Highlights

• Ethernet CNC motion control: Uses an RJ45 Ethernet connection instead of relying on an outdated PC parallel port.
• Up to 6-axis control: Supports X, Y, Z, A, B, and C axis CNC machine configurations.
• Up to 400kHz step frequency: Supports high-speed step output for compatible stepper and servo drive systems.
• 5 IDC26 LPT-compatible ports: Provides large input and output capacity for machine control wiring.
• 49 digital inputs and 36 digital outputs: Useful for switches, probes, relays, sensors, alarms, and auxiliary machine functions.
• 2 analog inputs and 2 analog outputs: Useful for spindle speed control, overrides, and analog control functions depending on setup.
• Software compatibility: Works with UCCNC, Mach3, and Mach4 when properly licensed, configured, and paired with the correct plugin.

C76 Breakout Board Highlights

• Designed for the UC300ETH: Built as a multifunction breakout board for UC300ETH-based CNC control systems.
• Organized CNC cabinet wiring: Converts controller connections into a more serviceable control cabinet layout.
• Built-in PWM spindle speed control: Supports spindle speed control wiring in compatible CNC systems.
• Built-in relays: Includes electromechanical relays with normally open and normally closed positions.
• Optoisolated inputs: Helps protect the control system from electrical noise and signal issues.
• Safety monitoring: Supports monitoring for E-stop, safety charge pump, driver fault, and VFD fault signals.
• C34 connector board compatibility: Helps simplify wiring to popular stepper and servo drives using compatible C34 boards.
• DIN rail mountable: Better suited for clean CNC electrical enclosure installations.

Best Applications

• CNC router control systems
• CNC milling machine controller upgrades
• Plasma table motion control systems
• DIY CNC machine builds
• Parallel port CNC machine retrofits
• Mach3, Mach4, and UCCNC control cabinet builds
• Stepper driver and servo driver systems using step and direction signals
• Machines that need spindle control, relays, optoisolated inputs, and expanded I/O

Technical Highlights

• Motion controller: UC300ETH-5LPT Ethernet CNC motion controller
• Breakout/interface board: C76 UC300ETH multifunction CNC breakout board
• PC connection: Ethernet RJ45 connection
• Software compatibility: UCCNC, Mach3, and Mach4
• Axis support: Up to 6 axes
• Maximum step frequency: Up to 400kHz
• UC300ETH digital ports: 5 IDC26 LPT-compatible ports
• UC300ETH digital inputs: 49
• UC300ETH digital outputs: 36
• UC300ETH analog inputs: 2
• UC300ETH analog outputs: 2
• C76 input support: TTL or industrial-type open-collector inputs
• C76 power terminal: 10-30VDC for board logic
• UC300ETH power requirement: External 5VDC power supply required
• Machine control type: Step and direction interface for compatible stepper or servo systems

Important Compatibility Notes

• The UC300ETH is not powered through Ethernet. It requires a stable external 5VDC power supply.
• Do not apply more than 5VDC to the UC300ETH power input.
• The C76 board uses a separate 10-30VDC power input for its logic power.
• Mach3 and Mach4 require the correct plugin and software setup.
• UCCNC requires the correct compatible license and configuration.
• This bundle does not replace your stepper drivers, servo drives, power supplies, VFD, spindle, limit switches, or E-stop hardware.
• Always verify your wiring, grounding, shielding, power supplies, drive signals, and software configuration before powering the machine.

Individual Product Pages

• View the UC300ETH Ethernet Motion Controller for more information
• View the C76 UC300ETH Multifunction CNC Breakout Board for more information

Why Buy the Bundle Instead of Separate Parts?

• Better match: The C76 is designed specifically for UC300ETH-based control systems.
• Less guesswork: Customers do not have to figure out which breakout board pairs with the UC300ETH.
• Cleaner build: The bundle is better suited for organized CNC control cabinet wiring.
• More complete control setup: Motion control, I/O breakout, spindle control, relays, and safety monitoring are handled as one system.
• Better sales positioning: This is not just a controller; it is a stronger foundation for a serious CNC electronics upgrade.

Documents and Setup Files

• 🔗 UC300ETH Manual
• 🔗 Plugin for Manual Installation for Mach3
• 🔗 UCxx Utility Software
• 🔗 C76 User Manual Rev.4 v2.1

Before You Order

• Choose this bundle if you want a UC300ETH-based Ethernet CNC control setup with cleaner wiring and expanded I/O.
• Do not buy this expecting it to connect directly to motors by itself. You still need compatible stepper drivers or servo drives.
• Make sure your CNC software, power supplies, drives, switches, spindle/VFD, and safety circuits are compatible before installation.
• This is the better choice over buying only the UC300ETH if your goal is a clean, serviceable CNC control cabinet.