DDSU666
Smart Meter
Quick Guide
Issue: 110-01
Date: 2024-12

Product Description

1.1 Outline and mounting dimensions

NOTE
The unnoted tolerance is ±1mm;
The appearance, size and information are subject to actual objects.

1.2 Product performance specifications 

Install DDSU666

Installing cables

3.1 Prepare Cables

• 0.25~5(80)A wiring – Direct connection

• Communications cable

NOTE
The maximum torque for terminal screws 1, 2 ,3is 1.7 N·m, and the recommended torque is 0.9 N·m to 1.1
N·m. The maximum torque for terminal screws 24 and 25 is 0.4 N·m, and the recommended torque is 0.15
N·m to 0.25 N·m.

3.2 Wiring Diagram

• Direct connection

Displays project and parameter Settings

4.1 Display
When the meter is powered on, it will display the software version number and CRC check code.
Software Version:V104,CRC check code:0x55d7. The key is used to switch the display interface.

No.	Display Interface	Instruction
Display when power on
1		Software version:V104
2		CRC check code:0x55d7
Auto display
3		Means the combined active total electrical energy, the unit is “kWh”, the left picture is 2.200kWh.
4		the current display voltage is U, the unit is “ V”, the left picture is U=220.0V.
5		the current display current is I, the unit is “A ”, the left picture is I=5.000A.
6		the current display is the active power P， the unit is “kW” ，the left picture is P=1.100kW.
7		the current display is the power factor Ft， the left picture is Ft=1.000.
8		the current display is frequency F, the left picture is  F=50.00Hz.
9		the current communication protocol is Modbus.
10		the current communication address of Modbus is 1.
11		Represents 8 data bits, no effect bit and one stop bit of the current communication protocol.
12		the current communication baud rate is 9600.

4.2 Parameter setting operation example
Description of pressing key:As shown in the following flowchart, long press the button and lift it to display the screen to enter the Setting ModBus address screen. Press the button again to modify the ModBus address. The address range of the button can be set to 1-247.

NOTE
Communication parameters are configured for the smart power sensor prior to delivery. If the communication is abnormal, check and set parameters.

Diagnosis, analysis and troubleshooting of common faults

Warranty and Service

The manufacturer implements three guarantees for product quality. Within 18 months from the date of delivery, if the user fully complies with the provisions of this manual and the factory seal is still intact, the
instrument is found damaged during use, and the company is responsible for free repair or replacement.

Environmental

Dear customer ：
Please help us do one thing, when this product at the end of its life, in order to protect our environment, please do a good job of recycling the product or its parts and materials. Please also dispose of materials that cannot be recycled. Thank you very much for your cooperation and support.

Statement

1. The products, services or features purchased by you are subject to the commercial contracts and terms signed with the Company, and all or part of the products, services or features described in this manual may not be included in the products purchased by you.
2. Except as otherwise agreed in the contract, the Company makes no representations or warranties, express or implied, about the contents of this specification.
3. The information in this brochure is subject to change without prior notice.
4. The Company shall not be liable for indirect losses arising from the provision, display or use of this material.

Manufacturer Information

Documents / Resources

CHNT DDSU666 Series Single Phase Smart Meter [pdf] User Guide 666-110, DDSU666 Series Single Phase Smart Meter, DDSU666 Series, Single Phase Smart Meter, Smart Meter, Meter

References

• User Manual