E+E Elektronik EE650 - Air Flow Sensor for HVAC

Installation

1. 1Mount the EE650 sensor in the ventilation duct according to the manufacturer's installation guide, ensuring correct insertion depth and orientation.
2. 2Connect the EE650 to the local network via Ethernet and assign it a static IP address or verify its current address in the sensor configuration tool.
3. 3Connect the ModbusCloud gateway (MCG or MLP series) to the same local network as the EE650 sensor.
4. 4In the ModbusCloud platform, import the E+E Elektronik EE650 template and enter the sensor's IP address and Modbus TCP port (default 502).
5. 5Verify that the gateway reads valid float32 values for airflow (register 1040) and temperature (register 1002) on the live data view.
6. 6Adjust the polling interval in the gateway configuration to match your monitoring requirements, for example every 10 or 30 seconds.

Things to watch for

01

I see zero or nonsensical values for airflow and temperature. What could be wrong?

The EE650 stores values in float32 format across two registers. Check that your gateway is configured to read 32-bit float and that the byte order (big-endian or word-swapped) matches the sensor's output. Try toggling the word swap setting if values look incorrect.

02

What Modbus TCP port does the EE650 use by default?

The default Modbus TCP port is 502. If you have changed this in the sensor's configuration, update the port number in the ModbusCloud gateway settings accordingly.

03

Can I connect multiple EE650 sensors to one ModbusCloud gateway?

Yes. Each sensor has its own IP address on the network. Add a separate device entry in ModbusCloud for each sensor, using the same EE650 template but pointing to the respective IP address.

04

Do I need to set a Modbus unit ID for the EE650?

In most Modbus TCP setups the unit ID defaults to 1. If your EE650 has been configured with a different unit ID, match it in the gateway connection settings.

Registers (2)

2 read / 0 write

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