https://scadametrics.com/PDF/App_Note_011.pdf
This type of application could be particularly useful in building automation and industrial control applications where full use of the EtherMeter’s auxiliary I/O channels could potentially save the integrator from the necessity of adding a full-featured controller.
Each EtherMeter contains 2 meter input channels (Each provides totalization and flow-rate), 2 analog input channels (4-20mA or 0-5V), and 3 digital I/O channels.