Zemismart SDM02T Zigbee 2-Phase Energy Meter Instruction Manual

1. Rhagymadrodd

The Zemismart SDM02T is a smart 2-phase energy monitor designed for real-time monitoring of electrical data. It consists of a compact monitoring module and two split-core current transformers (CTs). This device integrates with smart home ecosystems like Tuya and Home Assistant via a Zigbee hub, allowing users to track energy consumption, detect anomalies, and manage power usage efficiently. This manual provides essential information for safe installation, operation, and maintenance of your SDM02T energy meter.

Zemismart SDM02T 2P 120A Smart Zigbee Energy Monitors

Figure 1: Zemismart SDM02T 2-Phase Energy Monitor components.

2. Gwybodaeth Diogelwch

2.1. Hazard of Electric Shock, Explosion or Arc Flash

SDM02T sensors must ONLY be installed, operated, serviced, and maintained by qualified professionals.
Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. Refer to NFPA 70E, CSA Z462, DL/T 320 or local equivalent standards.
Diffoddwch yr holl ffynonellau cyflenwad pŵer cyn gosod ac wrth gynnal a chadw'r offer hwn.
Defnyddiwch gyfrol sydd â sgôr gywir bob amsertage dyfais synhwyro i gadarnhau pŵer i ffwrdd.
Do not use a SDM02T for voltage testing purposes. A dedicated Voltage Rhaid defnyddio profwr yn lle.
Gall methu â dilyn y cyfarwyddiadau hyn arwain at farwolaeth, anaf difrifol, neu ddifrod i offer.

2.2. Perygl Tân

SDM02T must be associated with an easily accessible upstream protection and circuit-breaker system.
The ends of voltage take-offs cables must be adjusted to the according equipment and device. Such an adjustment can only be handled by qualified professionals.
Gall methu â dilyn y cyfarwyddiadau hyn arwain at farwolaeth, anaf difrifol, neu ddifrod i offer.

2.3. Risk of Damaging the Device

Comply with the phase and the neutral position. Connecting the N pole of the voltage measurement connector to phase voltage yn cael ei wahardd yn llym.
Ensure that the split-core current transformers are not in direct contact with non-insulated conductors.
Datgysylltwch y cyftage take-offs of SDM02T before performing the dielectric withstand test or insulation measurements.
Limit the insulation measurements up to 500 VDC.
SDM02T can only be installed upstream if associated with a contactor, frequency converter or motor starters.
The product could be damaged if the blue cable for N connection is mistakenly connected to phase conductors.

3. Disgrifiad o'r Cynnyrch

The Zemismart SDM02T is a smart energy monitor designed for accurate real-time monitoring of electrical parameters. It features Class 1 energy accuracy, easy installation, APP control, alarm messages, and bi-directional monitoring capabilities.

Key features of Zemismart SDM02T energy monitor

Figure 2: Key features of the SDM02T energy monitor.

3.1. Disgrifiad Rhannau

Labeled diagram of SDM02T monitor and split-core CTs

Figure 3: Labeled components of the SDM02T monitor and split-core CTs.

Table 1: SDM02T Parts Description
Nac ydw.	Cydran	Disgrifiad
1	Pluggable terminal for the wire of voltage	Connects the voltage input wires.
2	Pluggable terminal for the wire of current transformer	Connects the CT wires to the monitor.
3	Botwm ailosod	Used to reset the device or enter pairing mode.
4	Statws LED	Indicates device status (pairing, connection, alarms).
5	Cod QR cynnyrch	For device identification and app pairing.
6	Model cynnyrch	SDM02T-TZ.
7	Calibration ID	Unique identifier for calibration.
8	Split-core CT locking clasp	Secures the CT around the conductor.
9	Positive energy flow direction	Indicates the correct orientation for current flow measurement.

3.2. Manylebau Technegol

Dimensions and electrical specifications of Zemismart SDM02T

Figure 4: SDM02T Product Parameters.

Tabl 2: Data Technegol
Paramedr	Gwerth
Model Cynnyrch	SDM02T-TZ
Cyfradd Gweithredu Cyftage U_n	110~240 VAC L-N, 50/60 Hz
Max Current I_max	120 A
Gor-gyfroltage Categori	III
Rated Isolating Voltage U_i	250 V
Rated Impulse Withstand Voltage U_arg	4 kV
Gradd Llygredd	3
Gradd Amddiffyn	IP20
Energy measurement accuracy class (IEC61557-12)	Dosbarth 1
Tymheredd Gweithredu Cyfradd	-25 ~ 70 ° C
Defnydd Pŵer Uchaf	≤ 2 VA

4. Gosod a Gosod

4.1. Gofynion

A Tuya Zigbee Hub or Zigbee2MQTT dongle is required for smart control and monitoring. (Not included in the product package).
Latest version of the Smart Life app installed on your mobile device.
Qualified professional for installation.

Zigbee hub is required for the energy monitor

Figure 5: Zigbee Hub Requirement.

Illustration showing Tuya Zigbee Hub or Zigbee2MQTT dongle for monitoring

Figure 6: Tuya Zigbee Hub or Zigbee2MQTT dongle is required for data monitoring.

4.2. Diagram Gwifrau

The SDM02T is suitable for use in UL single-phase (split-phase) three-wire systems and UL/IEC single-phase systems up to two branch circuits. Ensure all power supply sources are turned off before installation and during maintenance.

Wiring diagrams for UL Single-phase and UL/IEC Single-phase systems

Figure 7: Wiring Diagrams for various single-phase systems.

Application illustration of SDM02T wiring with split-core CTs

Figure 8: Application Illustration for SDM02T wiring.

Wiring diagram for a 2-phase electrical system with the Zemismart energy monitor and split-core CTs

Figure 9: Detailed wiring for a 2-phase system.

Detailed application illustration showing the wiring connections for the monitor and CTs

Figure 10: Detailed wiring connections.

Camau Gosod:

Mewnosoder y cyftage wire into the pluggable terminal.
Insert the wire of the current transformer into the pluggable terminal.
Install the Current Transformer around the live wire. Ensure the positive energy flow direction arrow on the CT points towards the load.

Diagram illustrating bi-directional power flow measurement

Figure 11: Bi-directional Measurement illustration.

4.3. Quick Setup (App Pairing)

Before activating the SDM02T sensor, ensure you have the latest version of the Smart Life app. If your device is a Zigbee version, install a Tuya Smart Zigbee gateway beforehand.

Connect your mobile phone to the wireless network.
Open the Smart Life App.
Tap "Home" and then tap "+" in the top right corner to enter the "Add Device" page.
The app will scan for smart devices. Once the SDM02T sensor appears, follow the in-app prompts to complete the pairing process.

Screenshot of the 'More Data' settings page in the app

Figure 12: App pairing process illustration.

5. Cyfarwyddiadau Gweithredu

5.1. Tuya APP Control

Key electrical data such as voltage, current, and power can be monitored in real-time via the Tuya APP. The app provides a comprehensive overview of your energy consumption.

Screenshot of the Tuya APP interface displaying real-time electrical data

Figure 13: Tuya APP Control interface.

Tuya APP control screen with numbered labels explaining each data point and setting

Figure 14: Tuya APP data points explained.

5.2. Home Assistant Real-time Monitoring

When paired with a Zigbee2MQTT dongle, all data becomes accessible for monitoring through Home Assistant, offering detailed insights into your electrical system.

Screenshot of Home Assistant interface showing real-time monitoring of electrical parameters

Figure 15: Home Assistant Monitoring interface.

Alternative screenshot of Home Assistant real-time monitoring

Figure 16: Alternative Home Assistant Monitoring view.

5.3. More Data & Electricity Consumption Statistics

On the device settings page, click "More Data" to set "Device Locating", "Interval for Data Reporting", and view L1 and L2 electricity data. You can also view daily, monthly, and yearly electricity consumption charts.

Figure 17: 'More Data' settings.

Screenshots illustrating navigation to 'More Data' and 'Electricity Data' settings within the app

Figure 18: Accessing detailed electricity data.

Screenshot of the 'Electricity consumption' chart in the app

Figure 19: Electricity Consumption Statistics.

5.4. Alarm Messages

Alarms can be configured in the APP settings to receive notifications when electrical data is abnormal. This helps in preventing short circuits and protecting household electricity safety.

Screenshot of the 'Alarm set' page in the app, listing various alarm types

Figure 20: Alarm settings in the app.

5.5. Energy Management

On the device settings page, click "Energy management" to clear existing energy data.

Screenshots showing how to access and use the 'Energy management' feature

Figure 21: Energy Management feature.

6. Disgrifiad Golau Dangosydd

The Status LED on the SDM02T monitor provides visual feedback on the device's operational status. Refer to the table below for detailed explanations.

Tabl 3: Statws y Golau Dangosydd
Statws LED	Disgrifiad
ON, normal using, connected to cloud	The device is operating normally and connected to the cloud.
Flashing at 2Hz, in pairing mode	The device is ready for pairing. Press the reset button until the LED flashes quickly to enter this mode.
Flashing at 0.5Hz, paired, searching for cloud	The product is not currently connected to the wireless network and is searching for it.
Flashing at 1Hz, wireless communication failed	Failed to communicate with the cloud. Check if the supply voltage yn rhy isel.
Flashing at 0.25Hz, self-checking failed	Self-check failed. Try restarting the device by disconnecting power, switching it on, and then repairing.
Flashing at 1Hz, alarm notification active	An alarm condition is active. Check device wiring and alarm information in the app.

7. Datrys Problemau

Dyfais ddim yn cysylltu â'r ap: Ensure the Zigbee hub is properly set up and connected. Check the device's Status LED for pairing mode (flashing at 2Hz) or communication failure (flashing at 1Hz). Verify your mobile phone is connected to the same wireless network as the hub.
Darlleniadau anghywir: Confirm that the split-core CTs are installed correctly with the positive energy flow direction arrow pointing towards the load. Ensure the voltage measurement matches the current measurement (L1 with CT1, L2 with CT2).
"Device Locating" function: This setting, found under "More Data" in the app, is typically used to help identify the physical location of the device within a larger smart home setup, or to assign it to a specific room for better organization and monitoring.
No data in Tuya app for bi-directional measurement: Note that the bi-directional measurement feature for specific values and charts is only supported on Home Assistant through Zigbee2mqtt, not directly on the Tuya app.
Alarms not received: Check your app's notification settings and ensure alarms are enabled for the desired conditions. Verify network connectivity.

8. Awgrymiadau Defnyddiwr

For optimal energy monitoring, regularly check the "Electricity consumption statistics" in the app to identify trends and potential areas for energy saving.
Utilize the "Alarm set" feature to configure alerts for abnormal electrical usage, such as over-current or over-voltage, to proactively protect your electrical system.
If using Home Assistant, leverage its advanced automation capabilities to create custom routines based on the energy data provided by the SDM02T.

9. Gwarant a Chefnogaeth

For detailed warranty information and technical support, please refer to the official Zemismart website or contact their customer service. A comprehensive user manual in PDF format is available for download, which includes additional details and diagrams. You can find the PDF manual yma.

Fideo: Cynnyrch drosoddview and installation demonstration (Spanish).