EN
The QDM11-1 Single-Phase 1-Pole DIN-Rail Energy Meter is a compact and cost-effective solution for accurate energy measurement in residential, commercial, and industrial applications. Two models are available: mechanical display and LCD screen. Equipped with RS485 Modbus-RTU communication, it enables reliable remote meter reading and real-time energy monitoring. Its slim DIN-rail design allows easy installation in distribution panels while ensuring long-term stability and measurement accuracy.
Micro Modular Profile: Standardized 18mm single-pole architecture (112×65×18mm) tailored for high-density side-by-side array clustering on standard 35mm DIN rails.
Core Protocol Foundation: Native integration of an isolated RS485 Modbus-RTU data port, providing clean streaming data registers for kW, V, A, Hz, and Power Factor.
Class 1.0 Metrology Engine: Delivers Class 1.0 active billing accuracy with a low 0.4% Ib starting current threshold, processing single-phase loads up to 32A max.
1. Bi-directional measurement of active energy.
2. Measure the instantaneous value, such as voltage, current, active power, power factor, and frequency.
3. Can perform time-of-use metering in 4 tariffs. Can set 8-12 daily intervals. Can freely set the date in every month to read the meter automatically. Can set a single tariff on weekends.
4. Can freely select the block interval demand (default) and sliding-window demand. The demand interval can be set within 1-99 minutes. Automatic resetting of the maximum demand or manual resetting for option.
5. Has a clock chip inside and a maintenance-free lithium battery inside. The battery capacity can be detected in real time and displayed.
6. Can record the electricity data for 12 months. Keeps the data permanently while the power is cut.
7. Display readable without main power (RWP) (optional).
8. Backlights to increase readability in low light conditions (optional).
9. LCD display with two options: cycle display (default) or key display item by item. Can set the cycle display interval. Can select the data item to display.
10. Real-time clock: clock with calendar, timing, and leap year automatic conversion function.
11. LEDs indicate the power supply state, energy impulse signal, load current flow direction, and the data communication state separately.
12. Equipped with RS485 data communication port and (or) IR data communication port for meter setting or reading meter. The meter setting has password protection. The communication protocol complies with standards IEC65056-21, DL/T 645-2007 or MODBUS-RTU, can also be customized by the user.
13. Optional built-in latch relay supports load on-off function.
14. Support multiple remote communication modes, such as Wifi, Bluetooth, LoRa.
| Specifications | QDM11-1 1P | |
| Accuracy | Active | 1.0 |
| Vollage | Rated current | 110V,120V,220V,230V,240V |
| Range | 0.8Un-1.2Un | |
| Limit | 0.7Un-1.3Un | |
| Frequency | 50Hz/60Hz | |
| Basic Current(lb) | Range | 5A,10A |
| Maximum Current(lmax) | Range | 32A |
| Starting Current | 0.4%lb | |
| Display | Type | LCD |
| Digit | 6+2 | |
| Power Consumption |
Voltage Circuit | ≤2.0W,10VA |
| Current Girauit | ≤4VA | |
| Communication | Interface | RS485 |
| Temperature Condition | Work Temperature | -25℃～+65℃ |
| Storage Temperature | -35℃～+75℃ | |
| Humidity | ≤85% | |
| IP degree | IP54 | |
| Dimension | 112X65X18mm | |
| Weight | Net weight | 0.08kg |
| Weight | 0.09kg | |
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