I m working on a project to control a proportional valve that operates on 24VDC from Allen Bradley Compact controller, the thing is I’m not quite sure how can I drive the valve knowing that XBee will operate on 3.3V? what I provide the power supply for the valve externally would be easier design?
Thank you in advance for your valuable contribution!
Thanks for your answer, I thought that the relay will be used for ON/OFF type of valve, but in my project I’m using proportional valve that requires 24VDC and 4-20mA to control the valve. I don’t how the 3.3V XBee can give me 4-20mA as a signal to the valve. So, it is not ON/OFF valve, it is an analog output 4-20mA operated valve…
Thank you again for the valuable comments…