The A9MEM1562 is a single-phase power monitor with harmonic measurement. Measures voltage (230V AC), current (63A direct), active/reactive energy, THD (up to 31st harmonic). Communication: Modbus RTU. Accuracy: Class 1.0. LCD display shows key parameters. Operating temp: -5°C to +55°C, humidity 5-95% (non-condensing). Power: 24V DC (120mA). DIN rail mount, IP20. Complies with IEC 61000-4-7.