Janitza UMG 96RM-M Universal Measuring Device with M-Bus, 10-300V AC L-N / 18-520V AC L-L 5222039

Panel builders and energy managers use the Janitza UMG 96RM-M in low-voltage distribution boards to capture electrical parameters across 1-, 2-, or 3-phase systems. The device measures voltage from 10 to 300 V AC line-to-neutral and 18 to 520 V AC line-to-line, with current input via external .../1A or .../5A transformers. Data is transmitted over M-Bus for integration into building automation or energy monitoring systems.

Key specifications

• Measurement system: 1-phase, 2-phase, 3-phase
• Voltage range: 10-300 V AC (L-N), 18-520 V AC (L-L)
• Current input: via current transformers (.../1A or .../5A)
• Communication protocol: M-Bus
• Energy accuracy class: 0.5S (IEC 62053-22)
• Harmonic analysis: up to 63rd harmonic
• Data logger: 128 MB Flash memory
• Digital inputs: 2; digital outputs: 2
• Auxiliary power supply: 95-240 V AC / 135-340 V DC
• Frequency range: 45-65 Hz
• Front panel protection: IP54; rear panel: IP20
• Measured parameters: voltage, current, power, energy, frequency, power factor, harmonics, THD

Why choose it

The UMG 96RM-M combines high-accuracy energy metering with comprehensive power quality analysis in a compact 96 x 96 mm panel-mount housing. Its M-Bus interface enables straightforward connection to standard metering infrastructure, while the built-in data logger stores long-term records for audits or troubleshooting.

Ideal use cases

• Sub-metering in commercial and industrial buildings
• Monitoring of distribution feeders and branch circuits
• Power quality analysis for harmonic distortion and THD
• Integration into M-Bus-based energy management systems

Good to know

The device requires external current transformers for current measurement. It is designed for panel mounting with a 92 x 92 mm cutout and features an LCD display for local readout. Auxiliary power can be supplied from either AC or DC sources within the specified ranges.