1–6 PQMII POWER QUALITY METER – INSTRUCTION MANUALCHAPTER 1: OVERVIEWFIGURE 1–3: Downloading Product Enhancements via the Serial Port1.2.5 Open ArchitecturePQMII units can initially be used as standalone meters. Their open architecture allowsconnection to other Modbus compatible devices on the same communication link. Thesecan be integrated in a complete plant-wide system for overall process monitoring andcontrol.