1. פּראָדוקט איבערview
The Growatt TPM-E Smart Meter DTSU666 is a high-precision three-phase energy meter designed for integration into photovoltaic (PV) systems, specifically compatible with Growatt MIN 6000TL-X inverters. This DIN rail mounted device measures various electrical parameters, providing essential data for system monitoring and management. It features an LCD display for local readings and RS485 communication for remote data acquisition. The meter itself is manufactured by CHNT.

פיגורע 1: פראָנט view of the CHNT DTSU666 Three-Phase Smart Meter, showing LCD display and control buttons (SET, ESC, arrow).
2. ספּעסאַפאַקיישאַנז
The following table details the technical specifications of the DTSU666 Smart Meter:

Figure 2: Detailed specifications table for the DTSU666 meter.
| קאַטעגאָריע | פּאַראַמעטער | ווערט |
|---|---|---|
| מעזשערמאַנט | העסקעם | יעק62052-11 יעק62053-21 |
| טיפּ פון קשר | 3P4W | |
| Accuracy (active) | קלאַס 1.0 | |
| Voltage | נאָמינאַל וואָלtage (און) | 3x220/380V, 3x57.7/100V |
| אַפּערייטינג קייט | 0.7Un ~ 1.2Un | |
| מאַכט קאַנסאַמשאַן | ≤1W, 5VA | |
| קראַנט | CT | קסנומקס (קסנומקס) א |
| Direct Connect (DC) | קסנומקס (קסנומקס) א | |
| אָפטקייַט | אַפּערייטינג אָפטקייַט | 50 הז אָדער 60 הז |
| לקד ווייַז | אותיות | 7 characters of 7 segment display |
| Digital size | 5.3 מם × 2.8 מם | |
| געפירט ווייַז | פלאַשיז | Number of flashes per kWh |
| געמאסטן וואַלועס | ענערגיע | Total kWh, Total kvarh |
| מאַכט | Instantaneous kW, kvar | |
| קראַנט | Instantaneous Irms | |
| Voltage | Instantaneous Vrms | |
| אנדערע | Frequency, power factor | |
| קאָמוניקאַציע | צובינד | RS485 |
| פּראָטאָקאָל | Modbus and DL/T | |
| ענוויראָנמענטאַל | Operating range limit | -40°C צו +75°C |
| Storage range limit | -40°C צו +85°C | |
| קאָרעוו הומידיטי | ≤95%רה | |
| ינגרעסס שוץ | IP54 | |
| דימענשאַנז & וואָג | דימענסיעס (L X W X H) | 98 מם × 65 מם × 72 מם |
| וואָג | 0.4 קג (בעערעך) |

Figure 3: Dimensional drawing of the DTSU666 meter, showing front, side, and top views מיט מעזשערמאַנץ אין מילאַמיטערז.
3. פּעקל אינהאַלט
Verify that all items are present and undamaged upon opening the package. If any items are missing or damaged, contact your supplier immediately.
- 1x Growatt TPM-E Smart Meter DTSU666 (CHNT DSSU666)
- 1x RS485 Communication Cable (length may vary)
- 1x Quick Start Guide / Basic Documentation (typical inclusion)

Figure 4: Typical package contents, including the DTSU666 meter and a coiled communication cable.
4. זיכערקייַט אינפֿאָרמאַציע
ווארענונג: געפאַר פון עלעקטרישן קלאַפּ. אינסטאַלאַציע און וישאַלט זאָל נאָר דורכגעפירט ווערן דורך קוואַליפֿיצירטע פּערסאָנעל.
- Always disconnect power before installing or servicing the meter.
- זיכער מאַכן אַז אַלע וויירינג איז אין לויט מיט די לאָקאַלע און נאַציאָנאַלע עלעקטרישע קאָודן.
- ניצט נישט דעם מעטער אויב עס זעט אויס צעבראכן.
- Keep the meter away from moisture and extreme temperatures outside its specified operating range.
- Ensure proper grounding for all connected equipment.
5. ייַנמאָנטירונג און סעטאַפּ
5.1 מאַונטינג
The DTSU666 is designed for DIN rail mounting. Securely attach the meter to a standard 35mm DIN rail within an electrical enclosure. Ensure adequate ventilation around the meter.

פיגורע 5: זייַט view of the DTSU666 meter, illustrating the DIN rail mounting mechanism.
5.2 וויירינג קאַנעקשאַנז
Carefully follow the wiring diagram below for connecting the meter to the grid, load, and inverter. Pay close attention to the input (L-in, N-in) and output (L-out, N-out) terminals, as well as the RS485 communication lines.

Figure 6: Wiring diagram for connecting the CHNT DTSU666 meter to an inverter, grid, and load, along with a table detailing meter pin connections.
טערמינאַל דיסקריפּשאַנז:
- L-in (Pin 1): Grid Live input.
- L-out (Pin 2): AC connector & Load Live output.
- N-in (Pin 3): Grid Neutral input.
- N-out (Pin 4): AC connector & Load Neutral output.
- RS485A (Pin 7): RS485 communication line A (connect to SYS COM Pin 7 RS485A2 on inverter).
- RS485B (Pin 8): RS485 communication line B (connect to SYS COM Pin 8 RS485B2 on inverter).
באַמערקונג: For the Australian market, installers may connect pin 3 or pin 4 to the neutral links/bars as per local regulations.

פיגורע 7: שפּיץ view of the DTSU666 meter, showing the input terminals (L-in, L-out, N-in, N-out) and RS485 communication terminals.

פיגורע 8: דנאָ view of the DTSU666 meter, showing the main power terminals.
6. אָפּעראַציע
Once properly installed and powered, the DTSU666 meter will automatically begin measuring electrical parameters. The LCD display provides real-time readings of various values such as total kWh, instantaneous power, voltage, current, and frequency.
6.1 אַרויסווייַז נאַוויגאַציע
Use the buttons on the front panel to navigate through the display menus:
- SET קנעפּל: Typically used to enter menu settings or confirm selections.
- ESC קנעפּל: Used to exit a menu or cancel an action.
- Arrow button (right): Used to scroll through different display parameters or menu options.
Refer to the detailed operational guide provided by Growatt for specific menu structures and parameter configurations, especially for integration with Growatt inverters.
7. וישאַלט
The DTSU666 Smart Meter is designed for reliable, long-term operation with minimal maintenance. However, periodic checks are recommended:
- רייניקונג: Gently wipe the meter's exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- קשר טשעק: קאָנטראָלירט פּעריִאָדיש אַלע וויירינג פֿאַרבינדונגען צו זיכער מאַכן אַז זיי זענען זיכער און פֿרײַ פֿון קעראָוזשאַן.
- ינווייראַנמענאַל טנאָים: זיכער מאַכן אַז די אָפּערייטינג סביבה בלייבט אין די ספּעציפֿישע טעמפּעראַטור און הומידיטי לימאַץ.
- Firmware דערהייַנטיקונגען: If applicable, consult Growatt's support resources for information on firmware updates for improved performance or new features.
8. טראָובלעשאָאָטינג
If you encounter issues with your DTSU666 Smart Meter, consider the following troubleshooting steps:
- קיין אַרויסווייַז/מאַכט:
- Check if the main power supply to the meter is active.
- Verify all power wiring connections (L-in, N-in) are correct and secure.
- Ensure the circuit breaker or fuse protecting the meter is not tripped or blown.
- פאַלש רידינגז:
- Confirm that the current transformers (CTs) are correctly installed and oriented (if applicable for your model/setup).
- באַשטעטיקן אַז די Voltage and current wiring matches the system configuration (e.g., 3-phase, 4-wire).
- Check for any loose connections that might affect measurement accuracy.
- קאָמוניקאַציע פּראָבלעמען (RS485):
- Ensure the RS485 A and B lines are correctly connected between the meter and the inverter.
- Check for proper termination resistors on the RS485 bus if required by the system design.
- Verify communication settings (baud rate, parity, data bits, stop bits) on both the meter and the inverter.
- Meter Not Responding to Buttons:
- Try a soft reset by cycling power to the meter (turn off, wait 30 seconds, turn on).
- אויב די אַרויסגעבן בלײַבט, קאָנטאַקט טעכניש שטיצן.
For further assistance, refer to the comprehensive Growatt inverter manual or contact Growatt technical support.
9. וואָראַנטי און שטיצן
For warranty information, please refer to the warranty card included with your product or visit the official Growatt webזייטל. האַלט אייער קויף קוויטל ווי אַ באַווייַז פון קויפן.
For technical support, troubleshooting, or service inquiries, please contact your authorized Growatt dealer or Growatt customer service directly. Provide your product model number (DTSU666) and serial number when seeking support.





