I see np reason why Opto's would not work, in fact if the Arduino is the only interface to the VFD PLC then you could probably go direct.
Seems overkill using relays.
Correct it should work with this VFD Drive, a lot have had problems though, going direct with the Arduino to the VFD Drive, which can sink or source all the inputs
We use cookies to optimize our website for you and to be able to improve it continuously. By clicking the "Accept" button, you expressly agree to the use of cookies. For further information on cookies, please refer to our privacy policy.