Starting at: $200.31  $186.00
Save: 7% off

The new MB3 Version 2 is the continued development of the MB series of breakout boards.  It keeps the best features of its predecessors MB1 and MB2 and in addition, allows all isolated inputs to be used in both NPN or PNP mode and also to operate with either 5V or 24V. In this new design, the ESS board can be directly plugged into the MB3 without using ribbon cables. This makes the ESS easier to install and reduces the distance the signals must travel. It eliminates a number of contact points, as well as inductance and resistance between the ESS and MB3 board. As a result, all signals are less likely to experience any induced noise or distortion.

MB3 is designed for industrial application and specifically to work with the Ethernet Smooth Stepper (ESS) which is an excellent motion control board designed to be used with Mach3 and Mach4. (Thai ภาษาไทย)

Specification and Features:

  • By using an Ethernet connection, the ESS is far more noise resistant than when using a USB or parallel port connection and therefore helps to protect the logic signal when the controller and drives are located a large distance from the computer.
  • Runs on Mach3 / Mach4 with Windows XP, Win7, Win8, and Windows10 both 32 and 64 bit, on both desktop and notebook computers.
  • New! Utilizes All 3 ports of the ESS.
  • The Motion Command Signal can be selected between Pulse/Sign, CW/CCW, and Quadrature. Frequency can be selected from 32 kHz to 4 MHz
  • New! Differential line driver for motion signals allows for longer wiring with more resistance to interference when compared to TTL open end.
  • New! A single 24Vdc Power Supply is needed.  There is a 5Vdc isolated and non-isolated dc2dc converter on board, thus saving installation space and wiring.
  • New! OSSD (Output Signal Switching Device) outputs and safety circuit are implemented when a peripheral device such as a servo motor drive or a spindle VFD (Variable Frequency Drive) trigger an alarm condition, which causes the Safety Circuit to disengage the OSSD output.  This method is used on large CNC machines to cut power from the drives.
  • New! status LEDs for all inputs and outputs including motion control signals. Makes it much easier to diagnose and troubleshoot.
  • Isolated power and ground between the PC, ESS and I/O, which eliminates crossover noise and ground loop problems.
  • Polarity and over voltage protection (in conjunction with a fuse) for the 24Vdc power supply.
  • New “AnaSpeed2” is a 0-10V precise analog output circuit has been implemented. This small circuit island is electrically isolated from the rest of the board, but it forms itself as part of the VFD input circuit which receives PWM signal from ESS by using light. It also has onboard isolated 12V DC2DC module which able to supply 0-10V to VFD continuously. The version V2 has two POTs for offset and linearity adjustment.
  •  A charge-pump signal is provided. This helps the user to form a safety interlock condition between controller and devices.
  • New! 18 Universal isolated fast inputs on port 1 and 2. They can be used as NPN and PNP inputs, also able to handle both 5V and 24V. These inputs can detect an index signal of the spinning motor at  862,200 rpm*.
  • New! 5 Universal isolated super-fast inputs on port 3. They can be used as NPN and PNP inputs, also able to handle both 5V and 24V. These inputs can detect an index signal of the spinning motor at  1,710,000 rpm*.
  • 14 NPN isolated output terminals capable of sinking current up to 70mA for each channel and up to 500mA per group.
  • New! - 3 onboard relays with both NO/NC contacts and 2 of them can select “Off Delay Time”, which can be used for such application as “Z Drop Protection.”,
  • The K3 Relay can be controlled by a charge pump signal.
  • New! The Raspberry Pi tall headers are used for a firm connection between ESS and MB3 board. This allows ESS to be mounted on MB3 directly without any ribbon cables. This method will eliminate a number of contact points, distance, inductance, and resistance between ESS and MB3 board which allows signals to flow forth and back better. Furthermore, this makes both companions look nicer and lower in height.
  • Industrial Spring terminals for quick connecting and disconnecting of cables. They are resistant to vibration, so no more screws which have rattled loose and no more forgetting to tighten.


  1. *Tested on Mach4 by using pulse generator.
  2. Please study Import Tax/Duties and Shipping Insurance conditions.

The package INCLUDES

The package NOT includes

  • ESS board
  • MB3 top cover panel ( It is sold as an option below)
  • Ethernet cable
  • Power supply 24V 3Amp

Related Products

  • ESS Ethernet Smoother Stepper.
  • MB3/ESS complete set controller and BOB.

Click to see complete ESS/MB3 board Click to see top cover panel

Related files
MB3 Owner Manual E20R1.pdf **Updated**
MB3 3D model pdf
MB3 3D Step.zip
MB3 ver 2.x PWM analog tuning TOOL **New**
SCU v1.3.1
Mach4 Hobby current version
Mach3 Version 3.043.062
Mach4 ESS Plugin Build232 and MB3 Profile
Mach3 ESS Plugin and MB3 Profile
Configurator v1.1
Schematics examples

Link to ESS Manufacturer
English tutorial

Youtube -Installation
MB3 ver 2.x PWM analog tuning **New**
ESS/MB2 Mach3 Thai
ESS/MB2 Mach4 Thai
ESS/MB2 Mach4 English by Craig Smith
Changing the IP address of ESS

Youtube -Test
4 Mhz step frequency
256 kHz step frequency
Load and Current

MachBob support forum
Showcase and Sales Activities New!

  DazTheGas channel

Add to Cart:

  • Model: MB3
  • Shipping Weight: 0.2kgs
  • 15 Units in Stock
  • Manufactured by: CNCRoom

Please Choose:

Current Reviews: 3

Your IP Address is:
Copyright © 2021 CNCRoom.