It’s 3-phase, 18 CT-channels (6 per phase), 4 pulse inputs, 2 tank inputs (4-20mA loops), an ethernet interface (2 ports to allow daisy-chaining with other LAN devices via an internal 3-port switch), mains powered, 4kV isolation between the high voltage side and the safe side… all running on an 8MHz AVR but with all the hard work offloaded to dedicated hardware. Here’s a pic with the DIN-rail covers removed…
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