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myCNC-ET10 CNC controller

Power supply connection

24VDC is used to supply myCNC-ET10 control board. The board contains 4 pins for connection +24V (joined internally) and a number of GND pins for convenient connection of external devices. Power Supply 24V DC and +24V and GND pins are shown in a picture below.


Pulse-Dir outputs

ET10 has 6 channel pulse/dir outputs, 3MHz max pulses frequency.

ET10 pulse dir outputs conform RS422 standard and compatible with most of servo and stepper drivers (line driver with paraphase signals positive and negative polarity). Internal schematic for pulse-dir is shown in a picture below.

Pulse-dir schematic pulse-dir6.jpg

PULSE-DIR channels 0,1,4,5 pinout et10-connection-pulsedir-001.jpg

PULSE-DIR channels 2,3 pinout et10-connection-pulsedir-002.jpg

ET10 Output pins

ET15 board contains … output pins-

  • 24 open collector outputs (OUT#0 … OUT#23)
  • 4 PWM outputs (PWM#1, PWM#2, PWM#3, PWM#4)

An internal schematic is shown in the picture below. Darlington transistors array chips ULN2003 are used to buffer binary outputs in ET10. Each chip contains 7 transistors and handles up to 7 binary outputs. We recommend to not exceed 0.25A output current for each output pin (however ULN2003 maximum current is 0.5A according to datasheet).

ET10 pinout for outputs is shown below


There are LED indicators for each Output and PWM pin on the ET10 board to control actual Output/PWM state. LEDs are highlighted in a picture below.


Galvanic isolated inputs

The ET10 control board has 48 galvanic isolated binary inputs, 12 groups of 4 inputs each. Each group has separate power supply pins so inputs can be powered from different power sources. Using PNP and NPN sensors simultaneously is possible too. Schematic of 4 inputs group is shown in a picture below.


ET10 Encoder inputs

ET10 board has 6 Incremental encoder inputs. THere are 4 complete ABC encoder inputs (A/B quadrature encoder signals and Z signal) and 2 reduced AB encoder inputs. ET10 encoder inputs conform RS422 standard and compatible with most of servo drivers and line driver incremental encoders. 34C86 chip is used in ET10 as a receiver of encoder signals. Internal schematic for line driver encoder inputs is shown on a picture below.

INCREMENTAL ENCODER inputs schematic (1 Encoder, ABC signals are shown) inputs-encoder.jpg

ENCODERS channels 0,1,2,3,4,5 pinout et10-connection-encoders-001.jpg

ET10 DAC +/-10V DAC outputs

ET10 control board contains 6 channel +/-10V DAC outputs. THis outputs can be used fro analgue servo ddrivers closed loop control, spindle speed control or any other application that needed in analogie signals in +/-10V range.

Connectors XT16 and XT5 are used to connect DAC outputs. The connectors pinout are shown in a picture below et10-connection-dac-001.jpg

Connection Examples -

3-wire NPN sensor connection example

Jumpers J1,J2,J3,J4 are open.

3-wire PNP sensor connection example

Jumpers J1,J2,J3,J4 are open.

Switch connection example

Jumper for selected group (one of J1,J2,J3,J4) is closed.

Common wire for 4 optocoupler units is connected to internal +24V if Jumper is closed. A switch should short another optocoupler input to GND(0V) to activate input pin.

J4 should be closed to connect the optocoupler pin to +24V. A switch should short wire to GND(0V).

Spindle Speed control over DAC (0-10V) output

ADC Inputs

myCNC-ET10 Control board has 8 ADC inputs. ADC Channel #0 has differential amplifier input pins and suitable to connect differential analogue signals up to 30V range. The rest 7 of ADC inputs are 0…5V Range. ADC inputs connectors have also GND and +12V DC output pins for convenient potentiometer connection.

Input schematic of ET10 differential ADC input (Channel#0) is shown below.

Input schematic for ET10 0-5V ADC inputs (Channels#1…#7)

Connectors XT20, XT21 are used to connect ADC inputs. The connector pinout are shown below


The picture below shows an example for potentiometer connected to ADC2 input.

RS422/RS485 Bus

A myCNC-ET10 control board has RS422/RS485 bus connector. Modbus ASCII/RTU and Hypertherm Serial communication interfaces are implemented in a myCNC-ET10 control board. RS422 connector pinout shown below


Board dimension

mycnc/mycnc_et10.txt · Last modified: 2018/05/05 23:23 by skirillov