Janitza UMG 103-CBM Universal Measuring Device for DIN Rail, RS485 Modbus RTU, 3-Phase, Class 0.5S 5228001

The Janitza UMG 103-CBM is a universal measuring device for DIN rail mounting that monitors electrical parameters in three-phase systems with high accuracy. It measures voltage, current, power, energy, frequency, power factor, and harmonics up to the 25th order, making it suitable for energy management and power quality analysis.

Advantages

The device offers a compact 4-module DIN rail design, a backlit LCD display, and RS485 Modbus RTU communication for integration into building management and industrial automation systems. Its Class 0.5S active energy accuracy ensures reliable billing-grade measurements.

Suitable for

• Energy monitoring in industrial plants and commercial buildings
• Power quality analysis including harmonic distortion
• Integration with PLC and SCADA systems via Modbus RTU
• Sub-metering applications requiring high accuracy

Key specifications

• Measurement type: Universal measuring device
• Mounting: DIN rail (4 modules)
• Nominal voltage: 230 V AC L-N (max 300 V AC), 400 V AC L-L (max 520 V AC)
• Current input: via current transformers, 0.001...6 A AC secondary
• Measured parameters: U, I, P, Q, S, E, f, cos phi, THD, harmonics up to 25th
• Accuracy: Class 0.5S active energy (IEC 62053-22), Class 2 reactive energy (IEC 62053-23)
• Communication: RS485 (Modbus RTU)
• Digital inputs: 2, digital outputs: 2
• Power supply: 95-240 V AC (45-65 Hz) / 95-250 V DC
• Measurement system: 3-phase 4-wire or 3-phase 3-wire
• Frequency range: 45-65 Hz
• Overvoltage category: CAT III 300V
• Protection: IP20 housing, IP50 front
• Operating temperature: -10 °C to +55 °C

Recommendations

For accurate energy monitoring in three-phase installations, pair the UMG 103-CBM with appropriate current transformers and configure via Modbus RTU for seamless data acquisition.