Any multifunctional, intelligent energy meter type DDS238-4 W is designed to measure AC active energy with two wires and a single-phase variable parameter. The device features RS485 and WiFi communication ports and can be used with the corresponding application to acquire useful information or for switching on/off.

All functions comply with the technical requirements for Class 1 single-phase meter in Watt-h in IEC62053-21, and the data communication rules comply with the requirements of MODBUS-RTU and WiFi 802.11b/g/n. The meter must be installed in a suitable environment, with an ambient temperature range between -25 and +55 degrees Celsius, relative humidity below 75%, and temperature limits between -40 and +70 degrees Celsius.

The meter is manufactured according to the international standard IEC62052-11 regarding "AC Electricity Metering Equipment General Requirements and Test Conditions" and IEC62053-21 for "Static Active Energy Meters (Classes 1 and 2)".

• Measurement of positive and negative active energy with the negative energy accumulating in positive.
• The meter displays total active energy, positive active energy, negative active energy, total reactive energy, and energy balance.
• Display of actual voltage, actual current, actual active power, actual power factor, and actual frequency.
• The LED pulse indicates the meter's operation and pulse output.
• Communication ports RS485 and WiFi.
• Active energy measurement without calibration under long-term operating conditions.
• Monitoring of historical active energy consumption per hour/day/month/year via the application.
• The application can display total active energy, actual voltage, and active power.
• Features overvoltage and undervoltage protection, and values can be adjusted via the application.
• Features overload protection.
• Can be switched on or off with a voice command.
• Alarms are recorded in the application.
• Data can be stored in memory when powered off, and it also measures energy when the WiFi connection is lost and updates the application when restored.
• Can reset active energy to zero from the application.

USER MANUAL