UMG 604
(Power Analyzer with DIN RAIL)

Power analyser

More than just a multifunction measurement device. Multifunction measurement device, transients recorder, meter (kWh, kvarh), peak load optimisation, harmonics analyser, PLC, state monitoring, event plotter, data logger.

Harmonics occur due to operating equipment with a non-linear characteristic, e.g. transformers used in saturation, energy saving bulbs, frequency converters and power electronics. They cause a load on the mains due to additional currents and can affect or even destroy operating equipment. This mains feedback can be detected and documented using power quality analysers.
Ethernet Modbus Gateway
The Ethernet Modbus gateway can be used to easily include the Modbus RTU devices that are connected to the master device as slaves in an Ethernet architecture. This is also possible via a Modbus RTU interface for devices with identical file formats and matching function codes.
Many UMG measuring devices have their own memory containing typical recording ranges of up to 2 years. Recording is freely configurable. A 128 megabyte memory can record around 5,000,000 values.
Measuring devices homepage
The web server for the measuring device provides a wide range of data in a user-friendly format. The user does not have to install any software on their PC; a conventional web browser is all that is required. The user enters the measuring device IP address in the browser's URL bar and the measuring devices homepage is displayed on the screen. In addition to the modern homepage, APPs are available for an extended range of functions.
Events are short-term increases in voltage, dips in voltage, current swells or short-term interruptions (e.g. through bird strike or short circuits). UMG measuring devices can safely record and process events as of 20 ms and transients as of 50 μs. The causes of power quality variations can be identified and analysed in this way.
The user can use the graphical programming language Jasic® to add their own functions to a UMG measuring device. Up to seven freely configurable user programs can run in parallel, e.g. monitoring processes or notifications when reaching defined threshold values. In addition to the graphical programming option, the user is also free to program the source code directly in JASIC.

  • Profibus (DP/V0) (optional)
  • Modbus (RTU, TCP, Gateway)
  • TCP/IP
  • BACnet (optional)
  • HTTP (configurable homepage)
  • FTP (File-Transfer)
  • SNMP
  • TFTP
  • NTP (time synchronisation)
  • SMTP (email function)
  • DHCP

  • Ethernet
  • RS232
  • RS485

Power Quality
  • Harmonics up to 40th harmonic
  • Transient recorder (> 50 μs)
  • Starting currents (> 20 ms)
  • Unbalance
  • Full wave effective value recording (up to 4.5 min.)

Accuracy of Measurement
  • Energy: Class 0,5 (... / 5 A)
  • Currant: 0,2 %
  • Voltage: 0,2 %

Temperature Measurement
  • PT100, PT1000, KTY83, KTY84

  • 3- and 4-phase networks
  • Up to 4 single-phase networks

Network Visualisation Software
  • GridVis®-Basic (in the scope of supply)

Peak demand management (optional)
  • Up to 64 switch-off stages

Programming language
  • Jasic®

2 Digital Inputs
  • Pulse input
  • Logic input
  • State monitoring
  • HT / LT switching
  • Emax resetting

2 Digital Outputs
  • Pulse output kWh / kvarh
  • Switch output
  • Threshold value output
  • Emax output
  • Logic output
(expandable via external I/O modules, see chapter 05, Industrial data communications)

Areas of Application
  • Master device for energy management systems, (e.g. ISO 50001)
  • Measurement, monitoring and checking of electrical characteristics in energy distribution systems
  • Consumption data acquisition
  • Monitoring of the power quality (harmonics, short-term interruptions, transients, starting currents, etc.)
  • Measured value transducer for building management systems or PLC
  • Control tasks e.g. depending on measured value or limit values being reached
  • Peak demand management
  • Ethernet gateway for subordinate measurement points
  • Remote monitoring

Measured Data Memory
  • 128 MByte Flash


More than just a multifunction measurement device. Multifunction measurement device, transients recorder, meter (kWh, kvarh), peak load optimisation, harmonics analyser, PLC, state monitoring, event plotter, data logger.

Power Quality
  • Harmonics analysis up to 40th harmonic
  • Unbalance
  • Distortion factorTHD-U /THD-I
  • Measurement of positive, negative and zero sequence component
  • Short-term interruptions (> 20 ms)
  • Logging and storage of transients (> 50 μs)
  • Start-up processes
  • Fault recorder function
  • Rotary field indication
DIN mounting rail (6TE): Simple and cost-optimised installation
  • Mounting on a 35 mm DIN rail
  • Clear cost advantages in the switch cabinet construction through lower installation and connection effort
  • Simple integration into the LVDB, in machinery construction, in installation subdistribution panel for building management systems, in IT and in data centres
Modern communications architecture via Ethernet
  • Rapid, cost-optimised and reliable communication through integration into an existing Ethernet architecture
  • Integration in PLC systems and building management systems
  • High flexibility due to the use of open standards
  • Simultaneous polling of interfaces possible
  • Simple integration of Modbus-RTU devices into an Ethernet architecture through the Modbus gateway function
  • Integration of devices with identical file formats and matching function codes possible via Modbus RTU interface
  • Fast and reliable data exchange via RS485 interface
  • Speed up to 921.6 kB/s
Graphical programming
  • Comprehensive programming options on the device, 7 programs simultaneously (PLC functionality)
  • Jasic® source code programming
  • Functional expansions far beyond pure measurement
  • Complete APPs from the Janitza library
Convenient home page and email functions
  • Information can be received conveniently by email and via the device homepage
  • Access to powerful device homepage via web browser
  • Online data, historical data, graphs, events and much more, is available direct from the homepage
Large measurement data memory
  • 128 MByte
  • 5.000.000 saved values
  • Recording range up to 2 years
  • Recording freely configurable
Dimension Diagrams(in mm)
Janitza-UMG 20604 Frontal Seite
Typical Connections
Janitza-UMG 20604 Anschlussbild 20