====== LamaPLC: Eastron SDM 72 ======
{{ :meas:sdm_72.jpg?200|Eastron SDM72}}
The Eastron SDM230 Modbus MID 3-phase kWh meter is ideal for the precise monitoring of, for example, a solar panel system, a charging station, a heat pump, or another 1-phase group of your choice. On the illuminated LCD screen, you can immediately see how many kWh the respective system consumes or produces, and it is used for official registration and billing of the measurement data. For example, if you want to bill a tenant for the electricity consumption of a specific room.

==== Eastron SDM72 Subtypes Comparison ====

**Key Feature Distinctions**
  * Direct (**D**): Internally wired to handle up to 100A.
  * **CT**: Requires external current transformers.
  * **M**: Includes an RS485 Modbus port for remote monitoring.
  * **R**: Features a resettable counter.
  * **BI**: Bi-directional measurement (Import/Export).

^Model^Communication^Measuring mode^MID Certified^Max Current^Distinctions|
^SDM72D|Pulse Output only|Direct|Optional (Must specify MID variant)|100A|Base entry-level model; displays total active energy (kWh) only.|
^SDM72DR|Pulse Output only|Direct|Yes (Standard on MID versions)|100A|Includes a resettable partial energy counter for custom interval tracking.|
^SDM72BI|Pulse Output only|Direct|Yes|100A|Measures bi-directional active energy (tracks separate import and export kWh).|
^SDM72D-M|RS485 Modbus RTU & Pulse|Direct|Yes|100A|Multifunction meter; tracks voltage, current, power factor, power, and bi-directional energy.|
^SDM72D-M-2|RS485 Modbus RTU & Pulse|Direct|Yes|100A|Upgraded version of the D-M; provides granular, multi-parameter measurements per phase.|
^SDM72D-M-2T|RS485 Modbus RTU & Pulse|Direct|Yes|100A|Dual-tariff version of the -2 model; tracks consumption across two separate energy rates.|
^SDM72CT-D|Pulse Output only|CT Operated|Optional (Must specify MID variant)|6A(Meter input max; scales to external CT limit)|Entry-level CT model; displays active energy (kWh) and power (W) via standard current transformers.|
^SDM72CT-MRS|485 Modbus RTU & Pulse|CT Operated|Optional (Must specify MID variant)|5A / 6A (Meter input max; scales to external CT limit)|Multifunction CT model; maps multi-parameters (V, A, W, PF) over RS485 Modbus remote networks.|
^SDM72CT-Bi|Pulse Output only|CT Operated|Yes|6A (Meter input max; scales to external CT limit)|CT-operated model dedicated entirely to tracking bi-directional import/export systems (e.g., commercial solar).|

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==== Arduino & Eastron SDM 72 ====



{{tag>modbus modbus_rtu eastron modbus_map MID SDM_72 SDM Arduino code}}
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