Eastron SDM230 Series User Manual
This document provides operating, maintenance, and installation instructions for the Eastron SDM230 series of single-phase, two-wire multifunction DIN rail electricity meters. The series includes models such as SDM230-Modbus, SDM230-Pulse, SDM230-Mbus, SDM230-2T, and SDM230M-DI.
The meters feature bi-directional measurement, making them suitable for import and export energy and power monitoring, including solar PV applications. With RS485 Modbus and M-bus ports, they facilitate remote communication with AMR/SCADA systems.
[Image Description: A compact, white, DIN rail mountable electricity meter with a backlit LCD display and connection terminals.]
1. Introduction
1.1 Key Characteristics
- Bi-directional measurement and display
- Multi-function measurements
- Two pulse outputs
- RS485 Modbus / M-bus communication
- 100A direct connection
- Two module size (35mm)
- Password protected set-up
- Backlighted LCD display
- 2 tariffs, dual power source (SDM230-2T)
- 2 Digital Inputs (SDM230M-DI)
1.2 Pulse Output
The meter provides two passive pulse outputs. Pulse output 1 is configurable for total, import, or export kWh/kVArh, with selectable pulse constants (0.001/0.01/0.1/1 kWh/kVArh) and pulse widths (200/100/60ms). Pulse output 2 is non-configurable, fixed to active kWh (Imp) with a constant of 1000imp/kWh.
1.3 RS485 Serial – Modbus RTU
The RS485 serial port supports the Modbus RTU protocol for remote monitoring and control. Communication parameters like baud rate, parity, stop bits, and Modbus address are configurable via the set-up menu.
1.4 Mbus for SDM230-Mbus
The M-BUS serial port uses the EN13757-3 M-bus protocol for remote communication. Communication parameters, including baud rate, parity, stop bits, primary address, and secondary address, are configurable.
1.5 Dual Source Measurement for SDM230-2T
This unit can measure energy from two different power supplies. For example, it can switch to tariff 2 measurement automatically when the public grid is off and an electric generator is on. The tariff can also be controlled by an external time relay.
2. Operation
2.1 LCD Display
The meter features a 7-digit LCD display with a backlight. It shows various measured values, units, tariff information, and communication status.
[Diagram Description: A representation of the meter's LCD display, showing numbered segments (1-26) and their corresponding descriptions, including total value, tariff information, import/export data, demand, units (V, A, W, VAr, VA, PF, Hz), pulse outputs, communication indicators, lock symbols, and software version.]
2.2 Initialization Display
Upon power-up, all display segments light up for a self-check. The default display page is total kWh.
2.3 Scroll Display by Buttons
Users can navigate through different measured values by pressing the scroll button on the front panel. The display order varies by model:
- For SDM230-Modbus: 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 Rate → Continuous Running Time.
- For SDM230-2T: Total kWh → T1 total kWh → T2 total kWh → Import kWh → Export kWh → Resettable kWh → Total kVArh → T1 total kVArh → T2 total kVArh → Import kVArh → Export kVArh → Resettable kVArh → Max. Power Demand → Voltage → Current → W → VAr → VA → Power Factor → Frequency → Pulse Constant → Modbus ID → Baud Rate → Continuous Running Time.
- For SDM230-Mbus: 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 → Mbus Primary Address → Mbus Secondary Address → Baud Rate → Continuous Running Time.
- For SDM230-Pulse: 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.
- For SDM230M-DI: 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 → DI1 → DI2 → Modbus ID → Baud Rate → Continuous Running Time.
2.4 Set-up Mode
To enter Set-up Mode, press and hold the “Enter” button for 3 seconds. The system prompts for a password (default: 1000). Successful entry allows configuration of various parameters.
3. Specifications
3.1 General Specifications
| Parameter | Specification |
|---|---|
| Voltage AC (Un) | 230V |
| Voltage range | 176~276V AC |
| Base current (Ib/Iref) | 10A |
| Max. current (Imax) | 100A (65A for ETL version) |
| Mini current (Imin) | 0.5A |
| Starting current | 0.4% of Ib/Iref |
| Power consumption | <2W/10VA |
| Frequency | 50Hz (for MID version) / 50/60Hz ± 2% (for non-MID version) |
| AC voltage withstand | 4KV for 1 min |
| Impulse voltage withstand | 6KV-1.2uS waveform |
| Over current withstand | 30Imax for 0.01s |
| Pulse 1 output rate | Configurable, default 1000i/kWh |
| Pulse 2 output rate | Non-configurable, 1000i/kWh |
| Display | LCD with backlit |
| Max. reading | 999999.9kWh |
3.2 Accuracy
| Parameter | Accuracy |
|---|---|
| Voltage | 0.5% of range maximum |
| Current | 0.5% of nominal |
| Frequency | 0.2% of mid-frequency |
| Active power | 1% of range maximum |
| Reactive power | 1% of range maximum |
| Apparent power | 1% of range maximum |
| Active energy | Class 1 IEC62053-21 / Class B EN50470-1/3 |
| Reactive energy | Class 2 IEC62053-23 |
3.3 Environment
- Operating temperature: -25°C to +55°C
- Storage/transportation temperature: -40°C to +70°C
- Reference temperature: 23°C ± 2°C
- Relative humidity: 0 to 95%, non-condensing
- Installation category: CAT III
- Mechanical environment: M1
- Electromagnetic environment: E2
- Degree of pollution: 2
3.4 Pulse Output
Pulse output 1 can be configured for kWh or kVArh, with constants from 1000 to 1, and pulse widths of 200/100/60mS. Pulse output 2 is fixed at 1000imp/kWh (Imp. kWh).
[Diagram Description: Shows the wiring for pulse output, emphasizing polarity and connection mode. It specifies an opto-coupler with a potential-free SPST-NO contact, with a contact range of 5~27VDC and a maximum input current of 27mA DC.]
3.5 Digital Inputs
*For SDM230M-DI only. The meter is equipped with two digital inputs that detect a voltage of at least 5V and maximum 24V DC @ 0.1W.
[Diagram Description: Shows the connection terminals for Digital Inputs DI1 and DI2, with a COM terminal, and specifies the input voltage range (5-24V DC @ 0.1W).]
3.6 RS485 Output for Modbus RTU
*Not for SDM230-Pulse or SDM230-Mbus. The RS485 port supports Modbus RTU protocol. Configurable parameters include baud rate (1200-38400 bps), parity (None/Odd/Even), stop bits (1 or 2), and Modbus Address (1-247).
3.7 Mbus
*For SDM230-Mbus only. The Mbus port uses EN13757-3 protocol. Configurable parameters include baud rate (300-9600 bps), parity (None/Odd/Even), stop bits (1 or 2), primary address (001-250), and secondary address (00000001-99999999).
3.8 Mechanics
- Din rail dimensions: 36x100x63 mm (WxHxD)
- Mounting: Per DIN 43880, DIN rail 35mm
- Ingress protection: IP51 (indoor)
- Material: Self-extinguishing UL94V-0
[Diagram Description: Illustrates the dimensions of the meter (36mm width, 100mm height, 63mm depth) and shows how it mounts onto a 35mm DIN rail.]
5. Installation and Sealing
The meter is designed for mounting on a standard 35mm DIN rail.
[Diagram Description: Shows a close-up of the meter's rear clip engaging with a 35mm DIN rail.]
6. Wiring Diagram
6.1 SDM230-V1
[Diagram Description: Wiring diagram for SDM230-V1. Terminals are labeled L-in, L-out, N-in, N-out, and 100A. It shows connections for Line and Neutral inputs and outputs, with a 100A rating.]
6.2 SDM230-V2
[Diagram Description: Wiring diagram for SDM230-V2. Terminals are labeled L-in, L-out, N-in, N-out, and 100A. It shows connections for Line and Neutral inputs and outputs, with a 100A rating.]
6.3 Definitions of other terminals
The diagrams for specific models (SDM230-2T, SDM230-Modbus/Std, SDM230-Mbus, SDM230-Pulse, SDM230M-DI) show terminal assignments for communication (A, B, GND), pulse outputs, digital inputs (DI1, DI2), and Mbus connections.
[Diagram Description: Shows terminal layouts for various SDM230 models. For SDM230-2T, it shows L-in, L-out, N-in, N-out, and pulse/2T terminals. For SDM230-Modbus/Std, it shows A, B, GND, and pulse/COMM terminals. For SDM230-Mbus, it shows Mbus1, Mbus2, GND, and pulse/COMM terminals. For SDM230-Pulse, it shows A, B, GND, and pulse/COMM terminals. For SDM230M-DI, it shows A, B, GND, DI1, COM, and DI2 terminals.]
Declaration of Conformity
Eastron Electronic Co., Ltd. declares that the single-phase multifunction electrical energy meter “SDM230 Series” complies with the requirements of Directive 2014/32/EU, as per EU-type examination certificate number 0120/SGS0206. The identification number of the notified body is NB0598.
[Logos: CE, RoHS, MID compliance marks are present.]
