Energy Manager EM300EM for use according to ISO50001. The 4-quadrant smart meter.

  • Typically used in commercial application
  • Connection of up to 96 current sensors (max. 8 energy bars)
  • 4-quadrant meter, 63 A direct measurement. 8GB Storage
  • Decentralized data logging (dependent on settings) class 1
  • 4 DU (Division unit)
Measurement of real and reactive power, apparent power, real, reactive and apparent energy, current, voltage and power factor per phase, connection of up to 96 current sensors
Automatic export of data as csv file by FTP File Transfer or e-mail, shortest data interval, 1 minute
Transmission of measurement data in addition via standard interfaces Modbus-TCP / Modbus-RTU, configurable for master/ slave operation (with additional connection of current sensors, transmission of measurement data only over Modbus-TCP)
Interval for transmission of measurement data configurable from 1 second, 200 ms on request (master/slave)
In Modbus-TCP slave mode, polling interval <1 second possible
Transmission of measurement data also by http request (output in JSON format)
Integral Web-server for easy configuration of the unit and clear display of the consumption values on a smartphone, tablet or PC, additional visualisation with IOs/Android app
Analysis software can be subsidised on the basis of ISO 50001 via the Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA - Federal Department for Business and Export Control)
LAN interface (EM300 L), LAN/RS485 interface (EM300 LR), LAN/WLAN/RS485 interface (EM300 LRW)

* not certified for generation of data for invoicing

Operating conditions

Ambient temperature:
  • -25°C...+45°C with reduced In to 32 A: -25°C...+55°C*
Relative humidity (non-condensing):
  • Up to 75% annual average (non-condensing), up to 95% on up to 30 days/year
Max. Height during operation:
  • 2000m above NN
Storage temperature:
  • -25°C…+60°C

Personal consumption

Starting current:
  • < 25mA
Complete device:
  • < 5 W without activated WLAN
Limiting current:
  • 63 A
Nominal current:
  • 5A
Voltage path:
  • < 0.01 VA per phase
Current path:
  • < 2 VA per phase

Mechanical data

Housing material:
  • Glass fibre reinforced polyamide
Glow wire test:
  • Text according to IEC 695-2-1
Protection class/type:
  • II/IP2X
  • 0.3 kg
  • 88x70x65 mm

Measurement accuracy

  • Accuracy class according to IEC 61557-12. Related to the measured value Energy manager
  • Related to IEC 62053-22 or -23 (typical)
Reactive power:
  • +/- 1.0%
Apparent power:
  • +/- 1.0%
  • +/- 0.5%
  • +/- 0.5%
Active power:
  • +/- 1.0%
Power factor:
  • +/- 1.0%
Active energy:
  • Class 1
Reactive energy:
  • Class 1
  • Note: When using external current transformers, the respective measuring accuracy must be taken into account.


Wire size:
  • 10-25 mm² (Mechanical: from 1.5-25 mm²)
Torque for screw terminal:
  • 2.0 Nm

Product norms

EN 61010:
  • yes
EN 50428:
  • yes
EN 60950:
  • yes

CPU/Processor data

  • ARM9 processor mit 450 MHz, DDR2 RAM mit 128 Mbyte eMMC Flash 4 Gbyte

Voltage and current inputs

Rated voltage:
  • max. 230/400 V~ (without WLAN), 230/400 V~ (with WLAN)
Operating voltage:
  • 110/230 V~ V +/-10% (without WLAN), 230 V~ V +/-10% (with WLAN)
  • 50/60Hz +/-5% (without WLAN), 50Hz +/-5% (with WLAN)

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