The Eastron SDM120-Modbus-MID is a compact single-phase multifunction energy meter designed for accurate monitoring of electrical consumption in residential, commercial and industrial applications.
Featuring a direct current connection up to 45A, the SDM120 does not require an external Current Transformer (CT), making installation simple and cost-effective. Its compact 1-module DIN rail design makes it particularly suitable for electrical panels where space is limited.
The integrated RS485 Modbus RTU communication interface allows the meter to be easily connected to energy monitoring systems, building management systems (BMS), industrial controllers, IoT gateways and other Modbus-compatible devices.
📊 Electrical Parameters
The SDM120-Modbus-MID provides real-time measurement and monitoring of key electrical parameters, including:
- ⚡ Voltage (V)
- 🔌 Current (A)
- 💡 Active Power (W / kW)
- 📈 Active Energy (kWh)
- ⚙️ Power Factor (PF)
- 🔄 Frequency (Hz)
🔗 RS485 Modbus Communication
With its built-in RS485 interface and Modbus RTU protocol, measurement data can be remotely collected and integrated into monitoring and automation platforms.
This makes the SDM120 an excellent choice for applications requiring centralized energy monitoring, consumption analysis or integration with smart building and IoT systems.
🛠️ Direct 45A Connection – No External CT Required
Unlike the SDM120-CT version, this model is designed for direct connection of loads up to 45A.
No external current transformer is required, simplifying wiring and reducing the number of components needed inside the electrical panel.
📋 Key Features
- ✅ Single-phase energy meter
- ✅ Direct connection up to 45A
- ✅ No external Current Transformer (CT) required
- ✅ Compact 1-module DIN rail installation
- ✅ RS485 communication
- ✅ Modbus RTU protocol
- ✅ Pulse output
- ✅ Multifunction LCD display
- ✅ Measurement of V, A, W/kW, kWh, PF and Hz
- ✅ MID Approved
- ✅ Suitable for residential, commercial and industrial energy monitoring
🏢 Typical Applications
Ideal for:
- 🏠 Residential energy monitoring
- 🏢 Commercial buildings
- 🏭 Industrial installations
- ☀️ Solar PV monitoring
- ⚡ Electrical distribution panels
- 🌐 IoT energy monitoring systems
- 🖥️ Building Management Systems (BMS)
- 📊 Energy management and consumption monitoring
Product Downloads
🎥 Product Video
- Model: SDM120-Modbus-MID - Phase: Single Phase (1P2W) - Connection Type: Direct Connection - Maximum Current: 45 A - Rated Voltage: 230 V AC - Frequency: 50/60 Hz - Communication: RS485 - Protocol: Modbus RTU - Modbus Address: 1–247 - Baud Rate: 2400–38400 bps - Pulse Outputs: 2 - Display: Backlit LCD - Energy Measurement: Bidirectional - Mounting: 35 mm DIN Rail - Width: 18 mm (1 DIN Module) - Dimensions: 118 × 18 × 64 mm - Certification: MID - External Current Transformer (CT): Not Required















