The SDM120-M is a MID Din Rail Single Phase Multi-function Solar PV /Zero Export Meter with RS485 output for PV metering. It measures active energy, reactive energy, current, voltage, power, power factor, frequency, etc. The units support Max. 45A direct connection, saving the cost and avoiding the trouble to connect external CTs. Two pulse outputs and 1 communication port (RS485 Modbus/DLT645) are provided for remote monitoring and setting, popular with single phase solar power system.
The unit has been approved to meet the requirements of EU Directive 2014/32/EU.
Electrical Characteristics | ||
Type of Measurement | RMS on single phase AC system (1P+N) | |
Measurement Accuracy | Voltage | ±0.5% |
Current | ±0.5% | |
Frequency | ±0.2% | |
Power Factor | ±1% | |
Active Power | ±1% | |
Reactive Power | ±1% | |
Apparent Power | ±1% | |
Active Energy | Class 0.5/1 IEC62053-21 Class C/B EN50470-3:2022 | |
Reactive Energy | Class 2 IEC62053-23 | |
Input & Output | |||
Input | Current | Rated Current (Ib/Iref) | 5A |
Max Current(Imax.) | 45A | ||
Min Current(Imin.) | 0.15A | ||
Starting Current | 40mA | ||
Voltage | Rated Voltage (Un) | 230V | |
Operational Voltage | 85~276V AC | ||
Output | SDM120P | 2 Pulse Output for imp/exp. energy | |
SDM120M | 2 Pulse Output + RS485 Modbus | ||
SDM120MB | 2 Pulse Output + M-bus EN13757 | ||
Modbus Communications | |
Interface Standard and Protocol | RS485 and MODBUS RTU |
Communication Address | 1~247 |
Transmission Distance | 1000m Maximum |
Baud Rate | 2400bps~38400bps |
Parity | None (default), Odd, Even |
Stop Bits | 1 or 2 |
Response Time | <100 mS |
M-Bus EN13757-3 Communications | |
Communication Address | 1~250 |
Transmission Distance | 1000m Maximum |
Transmission Speed | 300bps~9600bps |
Parity | None (default), Odd, Even |
Stop Bits | 1 or 2 |
Response Time | <100 mS |
