I have an application which would involve having data lines connected to a microcontroller which would signal at lvttl (3.3v) levels and also take in 24v for a resistive load (~600mA). I have previously used a mechanical relay for this same application without any major issues. I'm in the process of switching the microcontroller on this to something more modern, more powerful, cost effective and much smaller in size and decided to switch out the mechanical relay with a Solid State Relay. This would provide much higher life for the product, help me with making the part smaller and at the same time make manufacturing easier as the pick and place can mount the SMD SSR not requiring me to hand solder these separately.
From the datasheet I'm using connection "C" as that would be more suitable for the load I'm planning.
My issue is: The application my board connects to has a common ground. The lvttl lines and the 24v input both share the same ground, how would I handle that if I'm using a G3VM-61E1 or something similar? It seems internally the logic is similar to an N-Channel style mosfet.
If this isn't the right place to ask this question, please feel free to point me in the right direction or any resource you think is more appropriate.