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--- sensor:eastron_sdm_630 [2026/06/05 13:18] – vamsan
+++ sensor:eastron_sdm_630 [Unknown date] (current) – removed - external edit (Unknown date) 127.0.0.1
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-==== LamaPLC: Eastron SDM 630 Energy Meter with Modbus communication ====
-{{ :sensor:sdm630_1.png?180|Eastron SDM 630 Energy Meter}}
-The Eastron SDM630 is a series of three-phase, multifunctional DIN-rail-mounted energy meters used to measure and monitor electrical parameters in industrial, commercial, and residential applications. It is known for its high accuracy, compact design, and communication interfaces.
-**Key Features**
-  * **Multifunctional Measurement:** The meter measures a wide range of parameters, including active energy (kWh), reactive energy (kVArh), active power (W), apparent power (VA), voltage (V), current (A), power factor (PF), frequency (Hz), and total harmonic distortion (THD) for all phases.
-  * **Direct Connection:** Most models support direct connection for loads up to 100 A, eliminating the need for external current transformers (CTs) for many applications. Other variants, such as the SDM630MCT, are designed to operate with external CTs for higher-current applications.
-  * **Communication:** It features built-in interfaces, including RS485 Modbus RTU and dual pulse outputs, for remote monitoring and integration into Building Management Systems (BMS), energy management systems, or solar inverters (e.g., Deye, Growatt).
-  * **Display and Usability:** The meter has a clear, backlit LCD and user-friendly, password-protected menu navigation via touch-sensitive buttons on the front panel.
-  * Certification: Many models, such as the SDM630-Modbus-MID V2, are MID-certified, making them suitable for legally compliant billing.
-  * **Versatility:** It is compatible with single-phase two-wire, three-phase three-wire, and three-phase four-wire network configurations.
-==== Technical Specifications ====
-According to Eastron Europe datasheets and user manuals, the specifications for the standard SDM630 models are as follows:
-^Parameter^Specification|
-|Nominal Voltage (Un)|3x230/400 V AC|
-|Maximum Current (Imax)|100 A (direct measurement)|
-|Accuracy Class|Class 1 (IEC 62053-21) / Class B (EN50470-3)|
-|Frequency Range|50 or 60 Hz|
-|Communication|RS485 Modbus RTU, two pulsed outputs|
-|Display|Backlit LCD|
-|Mounting|35mm DIN rail|
-|Protection Degree|IP51 (indoor use)|
-|Operating Temperature|-25°C to +55°C|
-==== Eastron SDM630 Version V1, V2, and V3 ====
-The primary difference among the Eastron SDM630 V1, V2, and V3 versions lies in the firmware and specific energy calculation methods, particularly how the meters handle imported and exported energy.
-**Key Differences Summary**
-  * **V1 (Legacy):** The initial version with basic functionality and limited register addresses. It is supported only by certain software configurations at baud rates of 9600 or higher.
-  * **V2 (Standard/Net-Counting):** Introduced "net-counting" calculation, meaning the total energy measurement combines (Import minus Export) values. It added features such as a second resettable total energy counter and had slightly different default Modbus settings and options in its menus.
-  * **V3 (Enhanced Functionality/MID):** The latest version is often certified for commercial billing (MID certification). Functionally, it is very similar to V2 but ensures compliance with newer standards, includes updated firmware (typically post-2022 build dates), and may have slightly different default configurations in some supplier-specific models.
-**Detailed Comparison Points**
-^Feature^SDM630 V1^SDM630 V2^SDM630 V3|
-^Energy Calculation|Basic Import/Export|Net-counting (Total = Import - Export)|Net-counting, often with separate registers|
-^Resettable Energy|Limited options|Includes second resettable total energy counter|Same as V2, possibly enhanced options|
-^Firmware Date|Older builds|Typically prior to 2022|Typically 2022 or later|
-^Modbus Registers|Limited set|More extensive, with added registers|Largely consistent with V2 core registers|
-^Certifications|Standard|Standard, and MID options|Standard and MID options, focus on recent compliance|
-**Modbus Protocol Consistency**
-Crucially, the core Modbus register addresses for real-time measurements (//voltage, current, power, frequency//) are largely identical across all versions. The main differences users encounter typically relate to the interpretation of the total energy registers and minor menu/configuration variations.
-The default Modbus communication settings (Address 1, 9600 baud, 8N1) are generally consistent across all three versions, though supplier customizations exist.
-{{page>sensor:eastron_sdm_modbus}}
-==== Arduino & Eastron SDM 630 ====
-The Eastron SDM630 communicates via Modbus RTU over an RS-485 interface, requiring an RS-485 converter module and a dedicated library to read data on an Arduino. The **SDM_Energy_Meter library** simplifies this process.
-**Hardware Required**
-  * **Arduino Board:** Any compatible board (Uno, Nano, Mega, ESP32).
-  * **RS485 to TTL Converter:** A module using chips like [[ttl_to_rs485|MAX485]], MAX3485, or SN75176 to convert RS485 signals to Arduino's 5V/3.3V logic levels. These typically have Data Enable (DE) and Receive Enable (RE) pins that need to be controlled by the Arduino.
-  * **Eastron SDM630:** Configured with default settings: Modbus address 1, baud rate 9600, 8 data bits, no parity, 1 stop bit (8N1).
-**Wiring Schematic ([[ttl_to_rs485|MAX485 Module]])**
-  * MAX485 VCC → Arduino 5V
-  * MAX485 GND → Arduino GND
-  * MAX485 DI (Driver Input) → Arduino Pin 4 (TX for SoftwareSerial)
-  * MAX485 RO (Receiver Output) → Arduino Pin 3 (RX for SoftwareSerial)
-  * MAX485 DE (Driver Enable) → Arduino Pin 2 (Control pin)
-  * MAX485 RE (Receiver Enable) → Arduino Pin 2 (Connect DE and RE together as you only need one-way communication at a time)
-  * MAX485 A (RS485+ / Data+) → SDM630 A terminal
-  * MAX485 B (RS485- / Data-) → SDM630 B terminal
-**Arduino Example Code**
-This example uses the S**DM_Energy_Meter** library by reaper7 and the standard **SoftwareSerial** library.
-<code c>
-#include <SoftwareSerial.h>
-#include <SDM.h>
-// Pins for the SoftwareSerial communication
-// RX pin: 3, TX pin: 4
-SoftwareSerial sdmSerial(3, 4);
-// Pin 2 is used to control the DE/RE pins of the MAX485 converter
-#define RS485_EN    2
-// Create an SDM object (SoftwareSerial instance, Enable Pin)
-SDM sdm(&sdmSerial, RS485_EN);
-void setup() {
-  Serial.begin(115200);   // Serial monitor output
-  sdmSerial.begin(9600);  // SDM630 default baud rate
-  Serial.println("\nEastron SDM630 Reader");
-}
-void loop() {
-  // Read Voltage (Register 0x0000)
-  float voltage = sdm.readVal(SDM_PHASE_1_VOLTAGE);
-  if (!isnan(voltage)) {
-    Serial.print("Voltage L1: ");
-    Serial.print(voltage);
-    Serial.println(" V");
-  } else {
-    Serial.println("Failed to read Voltage");
-  }
-  // Read Total System Power (Register 0x0034 or 0x0052 depending on V1/V2/V3 meter version)
-  // Check documentation for the specific register address
-  float power = sdm.readVal(SDM_TOTAL_SYSTEM_POWER);
-  if (!isnan(power)) {
-    Serial.print("Total Power: ");
-    Serial.print(power);
-    Serial.println(" W");
-  } else {
-    Serial.println("Failed to read Power");
-  }
-  // Read Total Import Energy (Register 0x0048 or 0x0072 depending on version)
-  float energy = sdm.readVal(SDM_TOTAL_IMPORT_ENERGY);
-  if (!isnan(energy)) {
-    Serial.print("Import Energy: ");
-    Serial.print(energy);
-    Serial.println(" kWh");
-  } else {
-    Serial.println("Failed to read Energy");
-  }
-  delay(3000); // Wait 3 seconds before next read
-}
-</code>
-{{tag>modbus modbus_rtu eastron modbus_map MID SDM SDM_630 Arduino code}}
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