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OM-ACM-A802
The OM-ACM-A802 Single Phase Power Meter is a highly integrated product designed for measuring single-phase power parameters accurately. It precisely measures single-phase alternating current voltage, current (true RMS measurement), active power, reactive power, power factor, frequency, active energy, reactive energy, and other electrical parameters. With an RS-485 communication interface, it offers excellent cost-effectiveness.
1. Collects single-phase electrical parameters, including voltage, current, power, energy, and over 10 other electrical parameters, providing comprehensive information.
2. Utilizes dedicated measurement chips and measures alternating current true RMS, ensuring high measurement accuracy.
3. Communication protocol adopts standard Modbus-RTU, offering good compatibility and ease of programming.
4. Equipped with RS-485 communication interface with ESD protection circuit.
5. Wide operating voltage range of DC10 to 30V, with reverse connection protection function to prevent module damage from reverse power supply.
6. Uses industrial-grade chips with built-in watchdog and comprehensive lightning protection and anti-interference measures to ensure reliability.
7. High isolation voltage, voltage and current input signals are isolated by miniature precision transformers, withstanding up to DC2500V.
8. Multi-energy metering: accumulates both positive and negative active and reactive energy, as well as daily accumulated energy.
9. Features 1 configurable channel for active or reactive energy pulse output.
10. Configurable real-time data update cycle to meet various measurement requirements.
11. Equipped with LED indicators for easy on-site installation and debugging.
12. 35mm standard DIN rail mounting, with multiple wiring methods for convenient on-site installation and wiring.
| Project | Description |
| 1. Single-Phase AC Input | |
| Input Frequency | Mains frequency, 45 to 65Hz; |
| Voltage Range | Voltage options comprise 100V, 260V, 450V; |
| Current Range | 1A, 5A, or optionally equipped with precision transformers for higher accuracy, such as 100A/50mA, 50A/25mA; |
| Signal Processing | Utilizes dedicated measurement chips with 24-bit AD sampling; |
| Data Update Period | Configurable from 0.05S to 1.00S; |
| Overload Capacity | Sustainable up to 1.2 times the range; instantaneous (<10 cycles) current 5 times, voltage 3 times the range without damage; |
| Input Impedance | Voltage channel >1 kΩ/V; current channel ≤100mΩ; |
| 2. Energy Pulse Output | |
| Pulse Output | Single channel, configurable for selection of (absolute value sum) active or reactive energy pulse output options; |
| Pulse Width | Pulse output width is 50mS, negative pulse; |
| Pulse Equivalent per Unit | Each pulse equivalent to: meter voltage range * current range / 2,400,000 kWh; |
| 3. Communication Interface | |
| Interface Type | RS-485 interface |
| Communication Protocol | MODBUS-RTU standard protocol; |
| Data Format | Data format configurations include settings such as 'n,8,1', 'e,8,1', 'o,8,1', 'n,8,2' |
| Communication Rate | Configurable at 1200, 2400, 4800, 9600, 19200, 38400Bps. |
| 4. Measurement Output Data | The device measures over 10 electrical parameters including voltage, current, power, and energy. For details, refer to the Modbus data register list. |
| 5. Measurement Accuracy | Voltage, Current: ±0.2% FS; Other Electrical Quantities: ±0.5% FS; |
| 6. Isolation | The DC power supply, RS-485 interface, and pulse output share a common ground, which is isolated from the voltage and current inputs; isolation withstand voltage is 2500VDC. |
| 7. Power Supply | |
| Supply Voltage | DC+10～30V |
| Peak Voltage Limit | When powered by DC +10～30V, the peak voltage must not exceed +40V; |
| Typical Power Consumption | ≤0.5W |
| 8. Operating Environment | |
| Operating Temperature | -20～+70℃ |
| Storage Temperature | -40～+85℃ |
| Relative Humidity | 5～95%, no condensation (under 40℃) |
| Altitude | 0～3000 meters |
| Environment | No explosive, corrosive gases, or conductive dust; no significant shaking, vibration, or impact. |
| 9. Temperature Drift | ≤50ppm/℃ |
| 10. Current Connection | Optional terminal block connection or Φ9 punch-through method. |
| 11. Installation Method | 35mm standard DIN rail mounting |
| 12. Module Dimensions | 118×36×59mm |
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