Rhonmac-cnc Breakout Boards:                Additional Options

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Breakout Board. Part No BK1. Compatible with Mach3 and EMC2 and other control software.

Opto Isolated using a Class C Optical Coupler. Protects your equipment from short circuits.

Requires +5Vdc power to operate, use a dedicated power supply or take from a USB cable.

Output Connectors, P1, P2, P3, P4, P5, P6, P7, P8, P9, P14, P16 and P17.

Input Connectors P10, P11, P12/P13 and P16.

Ground Connectors P18 and P19.

Additional solder connections on board.

A very compact board  so will fit into smaller enclosures, Size only 67 mm width from back of Bd25 socket and 82 mm long. mounting holes 3mm diameter.


BK1. Breakout Board £27.50 each

Breakout Board. Part No RM2-25DB

Latest generation

Comes with a female DB25 connector as standard

These breakout boards are an ideal way of connecting your PC through your printer port to your project. These boards are easily connected to you CNC machine, robotics project or any other device that utilises a DB25 connector. See Data Sheet

RM2-25DB-M (Male)   £19.50 each   


RM2-25DB-F (Female)   £19.50 each  

Due to popular demand we can now supply


Add features to you project or CNC machine that are normally only found on professional machinery. Will turn on and off your AC mains appliances.

Turn your Machine Spindle, coolant or tool changer or other ancillary equipment

on and off from your program or PC.

Available with 2 x relays or 4 x relays.

Easily wired to your PC through the Breakout Board, Breakout Boards and Relay Boards have

screw terminals

RELB2 & RELB4 These relay boards provide an easy way of adding relay outputs to your project allowing you to switch on and off high current AC accessories, motors, coolant pumps and more, you name it.......

The boards are available in either 2 or 4 SPDT relay versions, relay driver circuits and protective diodes. Simply supply the board with power, connect your logic signals to the inputs via your breakout board, assign the pin out from your control PC and the relays are ready to use. Instructions sheet supplied

RELB2, 2 on board relays          

The relay contacts are electrically isolated from the rest of the board allowing the board to be used for a wide number of uses.

RELB4, 4 on board relays

Data sheet    Please note 4 relay data shown, 2 relay board has two circuits


RELB2  £35.95 each 

RELB4  £57.45 each 

RELB5HD, with 4 on board relays. Heavy Duty Relay Board.

• Opto-Isolated Inputs.
Isolates input connections to protect your computer from shorts circuits. An opto-isolator is an integrated circuit that transmits the signal through an encapsulated LED and photo-transistor, when the signal is present, the LED lights, and the photo-transistor captures it, and relays the signal. That way your computer’s electronics is completely isolated from your circuitry.

• All TTL +5VDC or +3.3VDC Signals.
Interface directly with parallel port interface products and other controls 5VDC (TTL) signals are very common among automation devices.

• Works With the Parallel Port Board.
Connect easily with the Parallel Interface Board, or any port pin.

• Works directly with popular CNC hardware and software. . Such as Rhonmac-cnc, Geckodrive, Desk CNC or Rutex, and parallel port control software, such as Mach2 and Mach3, Linux EMC, Turbo CNC, CNC Player  and others (Not all tested)

Data Sheet
• Controls 4 AC devices per card.

• Output at 230 3 x 5 amp relays and 1 x 15 amp relay .

• Independent fuses for each connection.

• Comes with an RJ45 Connector fast installation.

RELB5HD £49.75 each


Our policy is one of continual improvement therefore specifications may change without notice. Pictorial representations are intended as a guide only and may vary depending on machine model or product offered.