EARUELETRIC DDS661 Single Phase Energy Meter Instruction Manual

1. Introduction

The EARUELETRIC DDS661 is a single-phase, bidirectional, multi-function energy meter designed for accurate measurement of electricity consumption. It features a clear LCD backlight display and offers optional RS485 remote communication for centralized meter reading. This meter is suitable for DIN rail installation in household lighting distribution boxes and other electrical systems.

Key features include Class 1 accuracy, bidirectional measurement capability, power-off memory to prevent data loss, and the ability to display energy, current, voltage, and power parameters.

DDS661 Energy Meter with display showing Positive Power Consumption, Reverse Power Consumption, Total Power, Power Factor, Frequency, Voltage, Current. Text highlights Class 1 Accuracy, Bi-Directional Measurement, Power-Off Memory, DIN Rail Mounting, RS485 Communication, and that it Displays Energy/Current/Voltage/Power.

Figure 1: DDS661 Energy Meter Display and Key Features

2. Safety Precautions

Please read and understand all safety instructions before installation and operation. Improper handling can lead to serious injury or equipment damage.

Use only isolated tools for installation and maintenance.
Do not connect while the circuit is live (hot).
Do not connect the meter to a 3-phase - 400VAC network. This meter is designed for single-phase systems.
Place the meter only in dry surroundings.
Do not mount the meter in an explosive area or exposed to dust, mildew, and insects.
Make sure the used wires are suitable for the maximum current of this meter.
Make sure the AC wires are connected correctly before activating the current/voltage to the meter.
Do not touch the meter connecting clamps directly with your bare hands, with metal, blank wire or other material as you will have the chance of an electricity shock and a possible chance for health damage.
Make sure the protection cover is placed after installation.
Installation, maintenance, and repair should only be done by qualified personnel.
Never break the seals and open the front cover as this might influence the functionality of the meter, and will void any warranty.
Do not drop, or allow physical impact to the meter as there are high precision components inside that may break or render the meter measure accurate infrared.

CAUTION

Turn off and lock out all power supplying the energy meter and the equipment to which it is installed before working on it.
Always use a properly rated voltage sensing device to confirm that power is off.

3. Specifications

Product dimensions and a table of product parameters including Rated Voltage, Operating Voltage, Max Rated Current, Operating Current Range, Overcurrent Withstand, AC Withstand Voltage, Internal Power Consumption, and Accuracy Level.

Figure 2: Product Dimensions and Parameters

Parameter	Value
Model Number	DDS661
Brand Name	EARUELETRIC
Dimensions (LWH)	117mm * 19mm * 65mm (approx. 116mm * 17.5mm * 59mm)
Weight	0.12 Kg
Rated Voltage	AC 230V/50Hz (also available in AC 110V/60Hz)
Operating Voltage	161 - 300VAC
Max Operating Current	32A (Operating Current Range: 0.25A-32A)
Accuracy Class	1.0 (Class 1)
Measuring Energy Range	9999999.9 kWh
Phase	Single phase
Power Supply	AC
Display Type	LCD (7+1 digits) with backlight
Operating Temperature	-10℃ to +50℃
Storage Temperature	-30℃ to +70℃
Operating Humidity	≤75%
Storage Humidity	≤95%
Protection against penetration of dust and water	IP51
Insulating encased meter of protective class	II
AC Withstand Voltage	2KV for 1 minute
Impulse Voltage Withstand	6KV - 1.2µs waveform
Basic Current (Ib)	5 A
Over Current Withstand	960A for 0.01s
Operational Frequency Range	50Hz ±10%
Internal Power Consumption	≤2W / 10VA
Test Output Flash Rate (RED LED)	1000 impulses per kWh (0.5Wh/imp)
Pulse Output Rate (Pins 20 & 21)	1000 pulses per kWh (0.5Wh/imp)
Power Supply Indicator (Green LED)	Meter is connected and working OK
Consumption Indicator (RED LED)	Flashing at load running
Data Save	More than 20 years when power cut.
Certification	CE

4. Installation

The DDS661 energy meter is designed for 35mm standard DIN rail installation. It can be directly installed in household lighting distribution boxes or other suitable enclosures.

4.1 DIN Rail Mounting

The meter easily clips onto a standard 35mm DIN rail. Ensure it is securely fastened to prevent movement.

Figure 3: DIN Rail Mounting

DDS661 meter installed inside a household lighting distribution box on a DIN rail.

Figure 4: Example of DIN Rail Installation in a Distribution Box

4.2 Wiring Diagram

Follow the wiring diagram carefully. Ensure all connections are tight and correct to prevent malfunction or safety hazards. Only qualified personnel should perform wiring.

Wiring diagram for DDS661 energy meter. Input terminals (1) and (4) for Line (L) and Neutral (N) respectively. Output terminals (3) and (6) for Line (L) and Neutral (N). Pulse output contact terminals (20) and (21). RS485 communication terminals RS485+ (24) and RS485- (23) are shown as optional for RS485 models.

Figure 5: DDS661 Wiring Diagram

Note on RS485 Communication: Only models purchased with RS485 functionality will have terminals (23) and (24) connected for RS485 communication (Modbus-RTU).

5. Operation

5.1 Display Readings

The DDS661 meter features an LCD display with backlight, showing various electrical parameters. The display cycles through different measurements or can be manually advanced depending on the model. Typical displayed parameters include:

Positive Power Consumption (kWh)
Reverse Power Consumption (kWh)
Total Power (kWh)
Power (W)
Power Factor (PF)
Frequency (Hz)
Voltage (V)
Current (A)

DDS661 energy meter display showing various readings like Voltage, Current, Power, Frequency, Power Factor, Total Power, Positive Power Consumption, and Reverse Power Consumption for a 110V/60Hz system.

Figure 6: DDS661 Display Example (110V/60Hz)

5.2 Power-Off Memory

The meter is equipped with a power-off memory function. This ensures that all measured data is retained for more than 20 years even in the event of a power outage, preventing accidental zeroing and data measurement errors.

Illustration showing electricity level before and after a power outage, demonstrating the power-off memory feature of the DDS661 meter.

Figure 7: Power-Off Memory Function

5.3 RS485 Remote Communication (Optional)

For models equipped with RS485, the meter supports remote communication using the Modbus-RTU protocol. This allows for connecting multiple meters to collectors via RS-485 cables, uploading data, and receiving control commands from a server for centralized management and meter reading.

Diagram illustrating remote meter reading and centralized management setup, showing multiple DDS661 meters connected to an RS485 Collector, which then connects to a server.

Figure 8: Remote Meter Reading Setup

5.4 Product Demonstration Video

Video 1: DDS661 Product Overview and Basic Operation

6. Maintenance

Keep the meter clean and free from dust. Use a soft, dry cloth for cleaning.
Avoid exposing the meter to excessive moisture or direct sunlight.
Regularly check wiring connections for tightness and signs of wear.
Do not attempt to open or repair the meter yourself, as this may void the warranty and pose a safety risk.

7. Troubleshooting

If you encounter any issues with your DDS661 energy meter, please consider the following:

No Display/Power: Check the power supply connections. Ensure the meter is receiving the correct voltage (110V or 230V AC, depending on model). Verify that the green LED power indicator is on.
Incorrect Readings: Double-check the wiring according to the diagram (Figure 5). Ensure the meter is installed in a dry environment and not exposed to extreme temperatures.
RS485 Communication Issues: For RS485 models, verify the RS485 wiring (terminals 23 and 24) and ensure the communication settings (e.g., baud rate, parity) on your collector/server match the meter's settings.

For persistent problems or complex issues, please contact EARUELETRIC customer support.

8. User Tips

Pulse Constant Verification: The standard pulse constant for this meter is 1000 impulses per kWh (1000imp/kWh). If you are integrating this meter with other systems or have specific requirements, always verify the pulse constant setting or value to ensure accurate data interpretation. Some users might encounter meters with different pulse constants (e.g., 0.1imp/Wh, which is equivalent to 100imp/kWh), so it's crucial to confirm the correct value for your specific unit.
Backlight: The meter features a backlight for easy reading in various lighting conditions.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact the seller or EARUELETRIC customer service directly. Keep your purchase receipt as proof of purchase.