Data centre power monitoring systems typically face a binary choice: over specify capacity from day one, or face disruptive replacements as infrastructure grows. The UMG 801 modularly expandable power analyser from Janitza eliminates this compromise, expanding from eight to 92 current measuring channels without system downtime.
Genuine Space Savings
Ideal for space-constrained cabinets, a fully expanded UMG 801 analyser using low-power current transformer modules will occupy up to one metre less DIN rail space than conventional solutions that require transformer disconnect terminals. Each low power current measuring module adds eight measuring channels in a single sub-unit versus the traditional transformer modules requiring four sub-units.
The core unit’s ten virtual module slots accommodate any combination of Janitza’s plug and play modules. These include, for example, conventional transformer modules (800-CT8-A), low-power modules (800-CT8-LP), and digital input modules (800-DI14), with bridge modules connecting measurement points up to 100 metres apart without consuming slots. This elimination of transformer disconnect terminals and minimising of installation complexity also delivers up to 40% cost savings versus conventional architectures.
Precision & Integration
The UMG 801 samples voltage at 51.2 kHz, achieving Class 0.2 accuracy across voltage, current and energy measurements, essential for calculating PUE to two decimal places or identifying harmonic distortion affecting UPS performance. Voltage harmonic measurement extends to the 127th order, whilst transient detection captures events as brief as 18 microseconds. The 4GB of integrated memory maintains measurement continuity during network outages.
Meeting ISO 50001 energy management requirements, the UMG 801 features two simultaneously usable Ethernet interfaces for direct wiring and data transmission support redundant communication paths, and the native OPC UA standard with integrated security mechanisms enables direct data exchange with energy management and DCIM platforms without middleware. Modbus TCP/IP whitelisting restricts access to authorised systems whilst maintaining backwards compatibility with legacy SCADA infrastructure through the RS-485 interface.
Deployment Advantage
Initial configuration occurs via the integrated web server without proprietary software, with an optional remote display enabling monitoring and configuration without opening cabinets during live operations.
Typical deployment begins with base unit installation to monitor primary distribution and can be followed by incremental module add-ons as requirements expand over time. This eliminates the capital barrier of over-specifying capacity whilst avoiding operational disruption of system replacements, critical for facilities where downtime windows don’t exist.
To further enhance usability and real-time monitoring, the Janitza RD 96 remote display seamlessly integrates with the UMG 801 to provide convenient, real-time visualisation of all measured values and module data directly on the switchboard cabinet, without opening the cabinet door. The 96 × 96 mm front panel design enables straightforward installation, while intuitive push-button operation ensures easy navigation through all parameters. Connected via USB, the RD 96 mirrors the UMG 801 interface and offers full access to configuration and module views. This delivers a complete, user-friendly solution for measurement, monitoring, and system transparency at the installation site.
Summary
The Janitza UMG 801 is a modular, high-precision power analyser designed to grow seamlessly with data centre infrastructure, combining scalability, accuracy, and integration efficiency in a compact, cost-effective format.
- Scalable: Expands from 8 to 92 current channels without downtime
- Compact: Saves up to one metre of DIN rail space; ideal for tight cabinets
- Flexible: Mix of CT, low-power, and digital input modules; bridge modules span 100 m
- Cost-Efficient: Simplified installation cuts costs by up to 40%
- Accurate: 51.2 kHz sampling; Class 0.2 precision; harmonics to 127th order; 18 µs transient capture
- Reliable: 4GB memory maintains data during outages
- Connected: Dual Ethernet, OPC UA, Modbus TCP/IP, RS-485; ISO 50001 compliant
- Easy Setup: Web-based configuration; optional remote display
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