ABB PC D230 A communication and I/O module, part number 3BHE022291R0101, also known as PEC80-CCM. Used as the Communication Control Measurement interface in ABB UNITROL 6000 / 6800 excitation systems and AC800PEC platforms. Supports protocol conversion, data acquisition, and I/O expansion between excitation controllers and plant‑level DCS or SCADA networks.