DDSU666 / DTSU666 Multi-Function Electric Energy Meter User Manual

Product Overview

The MYRRHE DDSU666 and DTSU666 are advanced multi-function electric energy meters designed for precise measurement of various electrical parameters. These programmable meters are suitable for a wide range of applications, including solar photovoltaic inverter systems, providing accurate readings for voltage (V), current (A), active power (W), active energy (KWH), reactive power (VAR), and supporting MODBUS RS485 communication for integration into monitoring systems.

Key Features:

• Miniature Circuit Breaker form factor for easy installation.
• Measures Voltage (V), Current (A), Active Power (W), Active Energy (KWH), Reactive Power (VAR).
• MODBUS RS485 communication protocol for remote data acquisition.
• Programmable functions for customized operation.
• High accuracy for reliable energy monitoring.

Safety Information

WARNING: Installation and maintenance should only be performed by qualified personnel. Disconnect all power before installing or servicing the meter. Failure to follow these instructions may result in serious injury or death.

• Ensure the power supply is completely disconnected before any wiring.
• Verify correct wiring connections according to the provided diagrams.
• Do not operate the meter if it is damaged or malfunctioning.
• Observe all local electrical codes and regulations.

Setup and Installation

Mounting:

The DDSU666 and DTSU666 meters are designed for DIN rail mounting. Securely clip the meter onto a standard 35mm DIN rail within an electrical enclosure. Ensure sufficient clearance for wiring and ventilation.

Wiring Connections:

Connect the meter to the electrical circuit according to the wiring diagram provided on the device and in the detailed product documentation. Pay close attention to voltage and current transformer (CT) connections for accurate measurements.

This image displays the front panel of the DDSU666 single-phase electric energy meter. It features a digital display for readings, indicators for power flow, and connection points. A QR code is visible at the bottom left, which links to additional product information or documentation.

For more detailed information, scan the QR code or visit: http://m.chint.com/kunlun-im/m/index.php?qrcode=13

This image presents both the DDSU666 single-phase smart meter and the DTSU666 three-phase smart meter. The DDSU666 is shown mounted on a DIN rail, highlighting its compact design, while the DTSU666 is displayed with its larger interface, including 'SET' and 'ESC' buttons, indicating more advanced configuration options. Both meters feature digital displays and QR codes.

MODBUS RS485 Connection:

Connect the RS485 A and B terminals of the meter to your MODBUS master device (e.g., PLC, HMI, data logger). Ensure correct polarity and termination resistors if required by your network configuration.

Operating Instructions

Display Navigation:

The meter's display cycles through various parameters automatically. For models with buttons (like DTSU666), use the 'SET' and 'ESC' buttons to navigate through menus and adjust settings. Refer to the specific model's detailed manual for button functions and menu structures.

Reading Parameters:

The display will show real-time values for:

• V: Voltage
• A: Current
• W: Active Power
• KWH: Active Energy (Total/Forward)
• VAR: Reactive Power

MODBUS RS485 Communication:

The meter acts as a MODBUS slave device. Use a MODBUS master to read register values for all measured parameters and to configure programmable settings. The default communication parameters (baud rate, parity, slave ID) can typically be configured via the meter's display or through MODBUS commands.

Maintenance

The DDSU666 and DTSU666 meters are designed for long-term, maintenance-free operation. However, periodic checks are recommended:

• Cleaning: Gently wipe the meter's exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Connections: Periodically inspect wiring connections to ensure they are secure and free from corrosion.
• Environment: Ensure the operating environment remains within the specified temperature and humidity ranges.

Troubleshooting

No Display/Power:

• Check power supply connections to the meter.
• Verify the voltage at the meter's input terminals.
• Ensure the circuit breaker supplying the meter is not tripped.

Incorrect Readings:

• Verify current transformer (CT) connections and ratios are correctly configured in the meter.
• Check wiring for correct phase sequence and polarity.
• Ensure the meter's settings match the system configuration (e.g., single-phase vs. three-phase).

MODBUS Communication Failure:

• Check RS485 wiring for correct A/B polarity.
• Verify MODBUS parameters (baud rate, parity, stop bits, slave ID) match between the meter and the master device.
• Ensure termination resistors are correctly applied if necessary.

Technical Specifications

Warranty and Support

For warranty information, technical support, or service inquiries, please contact your original point of purchase or the manufacturer directly. Keep your purchase receipt as proof of purchase.