myCNC-ET7 control board uses 24VDC . 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 on a picture below.
ET7 has 6 channel pulse/dir outputs, 3MHz max pulses frequency.
ET7 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 on a picture below.
ET7 board contains 19 output pins-
WARNING: ET7 board rev.1,2 has Output pin names printed on Bottom side of the board. This names are NOT correct and differ from actual output addresses. Please check the table below to find out actual output address
|SILK print||Actual Output Pin Address|
Schematic for ET7 inputs & outputs is shown below
ET7 control board has 16 galvanic isolated binary inputs, 4 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.
Galvanic isolated inputs schematic is shown below
Connectors pinout for binary inputs is shown on a picture
ET7 control board has 3 AB incremental encoder inputs with hardware implemented decoding. Max pulse frewuency of encoder pulses is 3MHz. 6 encoder input signals are mapped to General purpose binary input addresses 20…25 and gan be used as normal binary inputs. Encoder inputs are line driver differential signal compatible.
Encoder inputs schematic is shown below
Encoder inputs connector pinout is shown on a picture
myCNC-ET7 controller has 8 ADC inputs.
Connectors pinout for ADC inputs is shown below
Non-isolated ADC inputs have 0…5V Range. Connector with non-isolated ADC inputs has also GND and +5V DC output pins for convenient potentiometer connection. Picture below shows an example for potentiometer connected to ADC2 input.
the myCNC-ET7 control board has RS422/RS485 bus connector. Modbus ASCII/RTU and Hypertherm Serial communication interfaces are implemented in the myCNC-ET7 control board.
RS485 bus enabled by default.
To enable RS422 intefrace you need
Please contact our support team if you need to use a RS422 bus.
RS422 connector pinout shown below
the myCNC-ET7 control board has DAC output for spindle speed control. DAC output range is 1..12V Actual Max DAC voltage (ie 10V, 5V, 6V) can be setup in the myCNC control software.
Jumper for selected group (one of J1,J2,J3,J4) is closed.
Common wire for 4 optocouple units is connected to internal +24V if Jumper is closed. Switch should short another optocouple input to GND (0V) to activate input pin.
J4 should be closed to connect optocouple pin to +24V. Switch should short wire to GNC(0V).
We have a simple keypad board that can be used with the ET7 controller. Keypad board connected to an ET7 controller through 20 wires flat cable. Keypad contains 23 keys, 2x rotary encoders and double-axes simple resistive joystick.
ET7 control board interface to connect external keyboard is shown below
ET7 connector pinout
ET7 connector X4 pinout table
|X4 connector to External 25-keys keyboard|
|1||OUT A||Keyboard matrix output pins|
|2||OUT B||Keyboard matrix output pins|
|3||OUT C||Keyboard matrix output pins|
|4||OUT D||Keyboard matrix output pins|
|5||OUT E||Keyboard matrix output pins|
|6||IN #1||Keyboard matrix input pins|
|7||IN #2||Keyboard matrix input pins|
|8||IN #3||Keyboard matrix input pins|
|9||IN #4||Keyboard matrix input pins|
|10||IN #5||Keyboard matrix input pins|
|11||E#0||Encoder input (General purpose input)|
|12||E#1||Encoder input (General purpose input)|
|13||E#2||Encoder input (General purpose input)|
|14||E#3||Encoder input (General purpose input)|
Each key, rotary encoder and the joystick functions can be programmed in configuration dialogs.
Schematics of the external ET7-KEY board is shown below