SDM230-Modbus
Single-phase Meter User Manual
Overview
The energy-meters “with a blue back-lighted LCD screen for prefect reading” are used to measure single-phase like residential, Utility and Industrial application. The unit measures and displays various important electrical parameters, and provide a communication port for remote reading and monitoring. Bi-directional energy measurement makes the unit a good choice for solar PV energy metering.
Technical Parameters
| General Specifications | |
| Voltage | 230Vac |
| Voltage range | 176-276Vac |
| Base current(lb) | 10A |
| Current range | 0.5-100A |
| Power consumption | <2W/10VA |
| Frequency | 50/60Hz(±10%) |
| AC voltage withstand | 4KV for 1 minute |
| Impulse voltage withstand | 6KV-1.2uS waveform |
| Max. Reading | 999999.9kWh |
| Accuracy | |
| Voltage | 0.5% of range maximum |
| Current | 0.5% of nominal |
| Frequency | 0.2%of mid—frequency |
| Power factor | 1% of Unity |
| Active power | 1% of rang maximum |
| Reactive power | 2% of range maximum |
| Active energy | Class 1 IEC62053-21 |
| Class B EN50470 -3 | |
| Reactive energy | 1% of range maximum |
| Environment | |
| Operating temperature | -25t to +55V |
| Storage and transportation temperature | -40t to +70t |
| Reference temperature | 23V±2t |
| Relative humidity | 0 to 95%, non-condensing |
| Altitude | up to 2500m |
| Installation category | CAT III |
| Degree of pollution | 2 |
| Communication | |
| Communication | R5485 output for Modbus RTU |
| Baud rate | 9600 |
| Mechanics | |
| Din rail dimensions | 36x99x63 (WxHxD) DIN 43880 |
| Mounting | DIN rail 35mm |
| Sealing | IPS1 (indoor) |
| Material | self-extinguishing UL94V0 |
Unpacking
| Item | Number | Description |
| A | 1 | Single phase meter |
| B | 1 | RS485 cable( standard length 5m) |
| C | 1 | User Manual |
Dimension (Unit: mm)
Installation
Wire diagram:
The Ingress Protection rate is IP51 and the pollution degree is PD2, So meter must be install in door. The whole installation chart shows as below:
before screw the cable. Please open the cover of meter:
The standard communication cable between meter and inverter is 5m, if it is not enough, Customers can be extended through the network cable.
Note: be careful the wire of input and output of L/N, if lines are wrong, it may destroy the meter.
LCD display
| Item | Descriptions |
| 1 | 7 digits used to display measured values or RTC |
| 2 | Total value |
| 4 | Import information, Export information |
| 5 | Max. Demand for Power or Current |
| 6 | Pulse output 1 and Pulse output 2 |
| 7 | Measurement units |
| 8 | PF = power factor Hz = frequency |
| 9 | Bar display of Power |
| 10 | Communication indicator |
| 11 | Time information |
| 12 | Low battery warning |
| 13 | Lock symbol |
When it is powered on, the meter will initialize and do selfchecking.
Full screen→ software version → Modbus ID → Baud rate → total kWh
Scroll display by Button
After initialization and self-checking program, the meter display the measured values. The default page is total kWh. If the user wants to check other information, he needs to press the scroll button on the front panel.
The display order by scroll button
Total kwh → import kwh → export kwh → resettable kwh → total kVarh → import kVarh export kVarh → resettable kVarh → Max. power demand → voltage → current → W → Var VA→ power factor → frequency pulse constant Modbus ID→ baud Fate → continuous running time.
Documents / Resources
 |
GROWATT SDM230 Modbus Single Phase Meter [pdf] User Manual SDM230 Modbus Single Phase Meter, SDM230, Modbus Single Phase Meter, Single Phase Meter, Phase Meter |
