So I am putting the final touches on my eHERMS system this weekend. I'm still waiting on my convoluted copper coil for the heat exchanger, but the last of the electrical equipment arrived last night. Two SS 90º float switches, one for the HLT, and one for the kettle.
Initially I was thinking I would wire the output from the BCS to the SSR controlling the heating element through the float switches interrupting the signal to the SSR if there is not enough liquid in the tank or kettle, but then I was thinking I COULD run the switches as a discrete input, and assign it in the software to be on for the elements to be on.
I cant think of any benefit to using the float switch as a DIN, rather than an interrupt to the output of the BCS. I can only think this would use up two DIN positions that could be used for other functions in the future.
Can any one think of a reason to use the float switch as a DIN vs a interrupt to the output?
Initially I was thinking I would wire the output from the BCS to the SSR controlling the heating element through the float switches interrupting the signal to the SSR if there is not enough liquid in the tank or kettle, but then I was thinking I COULD run the switches as a discrete input, and assign it in the software to be on for the elements to be on.
I cant think of any benefit to using the float switch as a DIN, rather than an interrupt to the output of the BCS. I can only think this would use up two DIN positions that could be used for other functions in the future.
Can any one think of a reason to use the float switch as a DIN vs a interrupt to the output?