EMU Professional II 3/5 LoRaWAN

The 3-phase indirect power meter EMU Professional II 3/5 LoRa for DIN rail mounting features a built-in wireless LoRa interface. The EMU Professional II is suitable for energy management as per ISO 5000, submetering and billing.

This version has an internal LoRa antenna and external SMA antenna connector.

Features

• Bidirectional three-phase power meter with LoRa interface
  • Built in LoRa interface and external SMA LoRa antenna connector.
• Wireless LoRa interface
• 3x230/400V
• Indirect using /5A and /1A current transformers
• Current transformer ratio configurable several times using the service key
• MID B+D, for billing purposes
• Accuracy class B (1%)

LoRa interface

To ensure a stable, high-performance connection to the LoRaGateway, the LoRa interface continuously adapts the optimal transmission and reception parameters.
For easier integration of the electricity meter, the status of the LoRa network connection can be accessed on the display at any time.

• Frequency band EU 863-870MHz
• Type: Class C device
  • Two-way communication.
  • LoRa interface is always ready to receive (Class C).
  • The LoRa interface has a signal strength of 14dbm.

Note:  When operating the LoRa power meter EMU Professional II 3/5 on a LoRa network which does not support Class C devices, the power meter EMU Professional II will work as a Class A device.

LoRa Decoder

On the TTN network, the EMU Professional II 3/5 LoRa is immediately available as a template.

Indirect LoRa power meter configuration ex factory

Every LoRa electricity meter has the following factory configuration

• JoinMode: OTAA
• DevEUI  (starting with 102CEF)
• Appkey
• AppEUI  (10 2C EF 00 00 00 00 00)

The DevEUI and the AppKey can be read on the display, the AppEUI is always 10 2C EF 00 00 00 00 00

LoRa power meter readings

• Active energy consumption (kWh) and supply (kWh)
• Reactive energy consumption (kWh) and supply (kWh)
• Active power (kw)
• Reactive power (kvar)
• Apparent power (kVA)
• Current (A)
• Frequency (Hz)
• Number of voltage failures
• Current transformer ratio

LCD-Display

Reading and setting parameters is user-friendly by a 38x28 mm graphic LCD display with LED backlight. This provides excellent visibility of numbers and letters.
Display language e.g. english or german can be selected by the keys.

Power meter configuration

Touch-sensitive control buttons are used for configuration. A sealable service button must be pressed for each configuration change.
The current transformer ratio (1 or 5 A transformer, up for up to 20000/5 or 4000/1 A) can be configurable several times.
Using the control keys a new LoRa key can be generated or a re-join can be started.

S0 pulse output

The 3-phase indirect power meter EMU Professional II 3/5 LoRa features a configurable S0 pulse output for active or reactive energy

• Pulse rate per kWh / kvarH: 1,10,100, 1000 or 10000
• Pulse length in milliseconds: 2ms, 10ms, 30ms, 40ms, 120 ms

Power meter manufacturer

The 3-phase indirect M-Bus power meter meter is produced in Switzerland by EMU Electronic Ltd.
More information: https://www.emuag.ch