Eastron SEM1-M-2 is a new generation din rail mounted energy meter, equipped with RS485 Modbus connectivity. With multi parameters measurement, SEM1-M-2 can be used for energy monitoring of various applications, such as solar PV system, smart building, industrial equipment, etc.
Eastron SEM1-M-2 measures characteristics of 1P2W network, including voltage, frequency, current, power and active and reactive energy, imported or exported, power factor etc. Energy is measured in terms of kWh and kVArh.
Eastron SEM1-M-2 is designed in compact size. To save installation and maintenance cost, all terminals of SEM1-M-2 adopt spring terminals or RJ terminals for easy connection.
The measurement mode of SEM1-M-2 is total mode. In total mode, import and export energy will be measured separately. Total energy equals to import energy plus export energy.
| Electrical Characteristics |
| Type of Measurement | RMS including harmonics |
| Measurement Accuracy | Power | ±1% |
| Active Energy | ±1% IEC 62053-21 Class 1 |
| Reactive Energy | ±2% |
| Frequency | ±0.2% |
| Current | ±0.5% (4A~120A) ±1% (1A~4A) ±3% (0.06A~1A) |
| Voltage | ±0.5% |
| Power Factor | ±0.1 |
| Data Update Rate | Active power: 50mS (RS485) |
| Input-Voltage | Un | 230V |
| Working Voltage Range | 100~277 V ac L-N |
| Frequency Range | 50/60 Hz |
| RS485 Communications |
| Protocol | MODBUS RTU |
| Communication Address | 1~247 |
| Transmission Mode | Half duplex |
| Data Type | Floating point |
| Transmission Distance | 1000m Maximum |
| Transmission Speed | 2400bps~115200bps |
| Parity | None (default), Odd, Even |
| Stop Bits | 1 or 2 |
| Response Time | ＜50mS |
