3-phase Universal Digital Panel Meter LED display volt, current, power, frequency, power factor, kWh ... , DI/ DO RS485, Modbus PMAC600B 3-phase Digital Panel Meter ØSuit for 220V, or 240V (ph-N) low voltage ... )Insulation Resistance≥ 50MΩMTBF≥ 50000hOperating EnvironmentOperating Temperature:-20°C~+60°CStorage Temperature:-40°C~+85°CHumidity:5%~95%,non- ... 5mm (+0.5mm) PMAC600B 3-phase digital panel meter