myCNC-ET7 control board uses 24VDC . The board contains 4 pins for connection +24V (joined internally) and 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 conforms 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 Botton side of the board. This names are NOT correct and differ from actual output addresses. Please check 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.
Connection Examples -
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 optocoupe pin to +24V. Switch should short wire to GNC(0V).
myCNC-ET7 Control board has 2 ADC inputs with galvanic isolation for save and convenient connection of Arc Voltage signal from Power station. Galvanic isolated ADC inputs are 0..10V, so High Voltage Arc signal CANNOT be connected directly to ADC inputs, voltage divider is NEEDED.
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 example for potentiometer connected to ADC2 input.
myCNC-ET7 control board has RS422/RS485 bus connector. Modbus ASCII/RTU and Hypertherm Serial communication interfaces are implemented in myCNC-ET7 control board. RS422 connector pinout shown below
We have simple keypad board that can be used with ET7 controller. Keypad board connected to ET7 controller through 20 wires flat cable. Keypad contains 23 keys, 2x rotary encoders and double-axes simple resistive joystick.
Each key, rotary encoder and joystck functions can be programmed in configuration dialogs.