The DDS238-4 W is a multi-function smart energy meter designed to measure single-phase two-wire AC active energy and various parameters. It features both RS485 and Wi-Fi communication, allowing for remote reading and on/off control via a dedicated application. The meter's functions comply with IEC62053-21 for class 1 single-phase watt-hour meters, and its data communication adheres to MODBUS-RTU and Wi-Fi 802.11b/g/n standards. It is designed for long life, offering high stability, high overload capability, low power loss, and a compact size.

Function Description

The meter measures positive and negative active energy, with negative energy accumulated into positive energy. It also displays real-time values for voltage, current, active power, power factor, and frequency. A pulse LED indicates the meter's operation, and a pulse output with optical coupling isolation (18-27V, 27mA) is available. The device measures active energy without requiring calibration for long-term operation and allows step-by-step display navigation using a button.

Key features include:

Remote Control: The meter can be controlled remotely via an APP for data reading and on/off functions.
Protection Features: It incorporates overvoltage, undervoltage, and overload protection, with configurable values via the APP.
Timing Control: A timing control function, also configurable through the APP, allows for scheduled on/off operations.
Energy Reset: The active energy can be reset to zero via the APP.

Important Technical Specifications

Meter Type: DDS238-4 W
Rated Frequency: 50 or 60 Hz
Rated Current: 5(60)A, 10(100)A
Rated Voltage: 120V / 220V / 230V / 240V
Normal Voltage Range: 90%Un ~ 110%Un
Limits Voltage Range: 70%Un ~ 120%Un
kWh Accuracy: Class 1
R.M.S Accuracy: Class 0.5
Pulse Constant: See meter
RS485 Port: MODBUS-RTU protocol, 1200 ~ 9600bps, None parity, default 9600bps
Wi-Fi: 802.11b/g/n, supports only 2.4GHz network (not 5GHz).
Delayed Power On/Off Time: 60±5s
Overvoltage/Undervoltage/Overload Event Judgment Time: 3s
Overvoltage Protection Value: 270V±1 (default), configurable via APP.
Overvoltage Recovery Value: 260V±1 (default) = (APP overvoltage value - 10V).
Undervoltage Protection Value: 170V±1 (default), configurable via APP.
Undervoltage Recovery Value: 170V±1 (default) = (APP overvoltage value + 10V).
Overload Protection Value: 65A (default), configurable via APP.
Delay On/Off Control: 00:01-24:00 Hour.
Self-consumption: Current circuit < 1.5VA, Voltage circuit < 2W/8VA.
Starting Current: Under rated voltage, frequency, and COSO=1, the meter starts and registers at 0.2% In (if CT used) or 0.4% Ib.
Anti-creeping: Logical circuit prevents more than one pulse when 115%Un is connected and current circuit is cut.
Average Life: At least 10 years in normal operation.
LCD: 6+2 (999999.99kWh).

Usage Features

The meter is designed for installation in environments with ambient temperatures between -25°C and +55°C, relative humidity less than 75%, and temperature limits between -40°C and +70°C.

Installation:

Mounts on a 35 mm DIN rail.
Must be checked and sealed before use.
Install in a waterproof box indoors or outdoors, fixed on a strong, flame-resistant wall at a recommended height of about 1.8m, away from corrosive gases.
Connect according to the diagram on the terminal cover, preferably using copper wire, ensuring all screws are tightened.

Wi-Fi Connection:

Pushing the setting button for 5 seconds puts the meter into Wi-Fi distribution network waiting status (Wi-Fi LED flashes 1s interval).
A solid Wi-Fi LED (on for 5s, off for 0.1s) indicates successful connection.
Use the "WISEN" APP (downloadable via QR code) to add the device.
The APP requires the phone to be connected to an available 2.4GHz Wi-Fi network (5GHz is not supported).
Input the Wi-Fi network account and password in the APP to complete the connection.

APP Interface:

Home Screen: Displays online/offline status of devices.
Meter Detail: Shows total active energy, total active power, import/export active energy, contrast active energy, frequency, R.M.S voltage, current, active power, reactive power, and power factor.
Control Button: Toggles meter output on/off.
Reset Button: Resets total active energy to zero.
Timing Button: Configures timing control (on/off) and time delay control.
- Time Control: Set specific on/off times. If no week is selected, it's a single-time control; otherwise, it's a cycle control.
- Time-Delay Control: Set delays from 1 minute to 24 hours for on/off operations (e.g., stopping car charging after 2 hours).
Setting Button: Configures protection values (overvoltage, undervoltage, overload) and unit price.
- Voltage High/Low Limit: Sets overvoltage/undervoltage protection thresholds. Overvoltage limit must be higher than undervoltage limit.
- Current High Limit: Sets overload protection threshold.
- Protection Logic: Protection events must last 3s to trigger cut-off. After cut-off, the meter delays 60s to confirm voltage/current recovery before automatically switching back on.
- Starting kWh Value: Used for calculating "contrast active energy" against a power company meter.
- Meter Price: Sets the price per kWh.
History kWh: Displays total active energy consumption for the last 7 and 30 days, and total active energy cost (special order in some countries).
Meter Detail: Shows R.M.S values, bi-direction active energy, and contrast active energy.
Management: Allows changing meter names and deleting meters from the device list.
Smart Interaction: Supports voice control for meter on/off via Cat Elf and Echo smart sound devices.

Maintenance Features

Warranty: 12 months from the date of sale, provided the user operates the device correctly according to the manual. Repairs or replacements are free of charge if the meter does not meet technical specifications.
Storage: Products should be stored in their original packaging, at temperatures between -40°C and +70°C, with relative humidity less than 75%, and no corrosive gases present. In a storehouse, meters should be placed on shelves, with no more than 7 cartons piled vertically. Single-packed meters should not be piled more than 5 meters high.

Hiking DDS238-4 W - Page 8

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