Commissioning is the critical process of setting up, configuring, and verifying that devices, such as the Alledio BACnet Sensors, operate as intended within their specific environments. Proper commissioning ensures the sensors deliver accurate, reliable data and integrate seamlessly into your building management system (BMS).
- Choose the Right Location
Mount the BACnet Sensor in an area free from direct airflow, such as air generated by fan coil units, split system units, localized heating or cooling devices, or central ventilation system intake grilles. This will help maintain measurement accuracy. - Position at the Correct Height
For optimal performance, mount the sensor at a height of 1.5 meters from the floor. This ensures consistent and precise readings. - Secure the Sensor to the Wall
Attach the sensor to the wall using the provided back plate. Ensure the back plate is oriented correctly by aligning it with the “UP” marking. This ensures the sensor operates at its best performance level. - Connect the Modbus Communication Cables
Begin by connecting the Modbus communication cables to the sensor. Use Pin 3, 4, and 5 for this connection. - Connect the Power Supply Cables
Next, connect the power supply cables to the sensor. Use Pin 1 and 2 for this step. - Close the Sensor
Once the sensor is securely mounted and all connections are in place, close the sensor by attaching the front plate. - Configure the Sensor
After installation, the sensor is ready for configuration. Use a smartphone to complete the setup process.
By following these instructions, you can ensure your sensor is installed correctly and delivers reliable, high-performance results.
For additional guidance and step-by-step support, explore our Complete Mounting Instructions for a BACnet Sensor.
Sensor Installation
Step 1: Initial Setup
- Connect Modbus Cables: Attach the Modbus communication cables to the sensor.
- Power Supply: Connect the sensor to a stable power source.
- Configure Modbus Settings: Use your smartphone to connect to the sensor and configure the Modbus settings, including:
- Address: Assign a unique Modbus address.
- Baudrate: Set the communication speed.
- Parity: Configure the parity setting for error checking.
Step 2: Auto-Calibration
- Once powered, allow the sensor to initialize and auto-calibrate.
- Wait Time: The auto-calibration process typically takes 30 to 45 minutes. During this time, the sensor will automatically adjust itself to provide accurate readings.
- Important: Avoid interacting with or making adjustments to the sensor during this critical phase.
Step 3: Post-Calibration Configuration
- After the auto-calibration period, connect to the sensor using an NFC-enabled smartphone.
- Use the provided application to:
- Establish a connection with the sensor.
- Configure Modbus communication settings.
- Adjust sensor offsets to match your specific application requirements.
Important Considerations
- Power Interruptions: If the power supply is interrupted during commissioning:
- Allow the sensor to cool down to room temperature before reconnecting it to the power source.
- This precaution ensures the integrity of the calibration process and prevents operational errors.
- Reliable Performance: Following these guidelines will help achieve consistent and reliable sensor performance.
- Power Interruptions: If the power supply is interrupted during commissioning:
Additional BACnet IP Settings
For optimal BACnet IP configuration, ensure proper setup of
- IP Address: Unique address for device identification.
- Subnet Mask: Determines network and device identification.
- Gateway: IP address of the network router for cross-subnet communication.
Setting Up the Sensor with the App
- Status: Displays connection status and last data retrieval time.
- Values: Live readings updated every 5 seconds.
- Modbus RS485 Settings: Configure address, baud rate, parity, mode, stop bits, and termination.
- BACnet MSTP Settings: Set device ID, MAC ID, max master, and baud rate.
- BACnet IP Settings: Configure device ID, SSID, password, and port.
- Registers: View the registers table and gains.
- Offset: Adjust sensor offsets as needed.
Step-by-Step Setup with the App
- Connect to the Sensor:
- Use NFC (Near Field Communication) or WiFi to pair your smartphone with the sensor.
- Hold your phone close to the sensor for NFC pairing, or connect to the sensor’s internal WiFi network (range: up to 2 meters).
- Configure Modbus Settings:
- Set the Modbus address, baud rate, and parity to match your system requirements.
- Adjust stop bits and termination settings if needed.
- Configure BACnet Settings:
- For BACnet MSTP: Set the Device ID, MAC ID, Max Master, and baud rate.
- For BACnet IP: Configure the Device ID, SSID, password, and port.
- Adjust Sensor Offsets:
- Fine-tune sensor offsets to ensure accurate measurements for your specific application.
- Monitor Live Data:
- View real-time readings for temperature, humidity, VOC, CO2, pressure, and occupancy.
- Data updates every 5 seconds for precise monitoring.
Commissioning and configuring BACnet MSTP parameters involves setting key network settings for reliable communication. Key parameters include:
- Device ID: Unique identifier for each device.
- MAC ID: Address for device positioning on the MSTP network.
- Max Master: Highest address for master devices, controlling communication initiation.
- Baudrate: Data transmission speed (e.g., 9600, 19200 bps) for network compatibility.
Proper setup ensures efficient and reliable BACnet MSTP network operation.
On-device sensor calibration, which involves setting precise offsets to ensure accurate measurements, can be conveniently performed using a mobile web app. This process is streamlined and user-friendly, requiring only a quick tap on the sensor case to initiate or confirm calibration.
This approach simplifies the calibration process, making it accessible and efficient for users without the need for complex tools or procedures.
Configuring and setting up BACnet IP parameters involves defining key network settings for seamless communication. Key parameters include:
- Device ID: A unique identifier for each device on the BACnet IP network.
- SSID: The network name for wireless connectivity, ensuring the device connects to the correct network.
- Password: The security key for accessing the network, protecting communication.
- Port: The communication port (e.g., 47808) used for BACnet IP data transmission.
Proper configuration ensures reliable and secure BACnet IP network operation.
Sensor Installation / Electrical Connection
Pin: A pin refers to a metal connector on a device or cable that allows electrical connections to be made. Each pin is typically assigned a specific function.
+Vin / ~Vin:
+Vin: This stands for “Positive Voltage Input.” It is the pin where the positive wire from the power supply should be connected to provide power to the device.
~Vin: The tilde (~) symbol indicates that this pin can also accept an alternating current (AC) voltage input, in addition to direct current (DC).
-Vin / ~Vin:
-Vin: This stands for “Negative Voltage Input.” It is the pin where the negative wire from the power supply should be connected to complete the circuit.
~Vin: Similar to the positive pin, this indicates that the pin can also handle AC voltage input.
Versatile Sensor Options
Choose from a range of configurations to suit your specific needs:
In continuation of the blog, read more technical details about the BACnet Multi-Sensorwhich includes temperature, humidity, VOC and CO2 measurments. It also computes enthalpy, dew point and air density.
Key Features
- Robust Housing: Made from flame-resistant ABS material, ensuring durability and safety.
- Wide Power Range: Compatible with both AC (24 VAC) and DC (15-35 V) power supplies, offering flexibility in installation.
- Comprehensive Measurements: Tracks a wide range of environmental factors, from temperature and humidity to air quality and occupancy.
- High Accuracy: Delivers precise readings with minimal deviation, ensuring reliable performance.
- Auto-Calibration: The CO2 sensor automatically recalibrates every 7 days, maintaining long-term accuracy.
Technical Specifications
- Housing Material: ABS (flame resistant)
- Power Supply: AC: 24 VAC; DC: 15-35 V (24V configuration: 45mA/1.08W; normal operation: 34mA/0.82W)
- Sensor Measuring Ranges:
- Temperature: -40°C to +125°C
- Humidity: 0–100%
- VOC: 0–1000 ppm Ethanol in clean air (specified range: 0.3–30 ppm); 1–500 VOC Index points
- CO2: 0–5000 ppm
- Pressure: 300–1200 hPa
- Presence: 0.0m to 8.4m (adjustable in 0.7m steps)
Accuracy You Can Trust
- Temperature: ±0.2°C (within 0–65°C)
- Humidity: ±1.8% (30–70%), ±2% (10–30%, 70–90%)
- VOC: < ±15 VOC Index points (< ±3%)
- CO2: ±(50 ppm + 5% of reading) at 400–2000 ppm
- Pressure: Relative accuracy: ±0.06 hPa; Absolute accuracy: ±1 hPa
- Presence: ±0.35m
Seamless Connectivity
- Modbus RS485, BACnet MSTP, BACnet IP: Ensures compatibility with a wide range of building automation systems.
- NFC and WiFi: Easily configure and monitor the sensor using a smartphone. The internal WiFi network operates within a 2-meter range, providing real-time data updates every 5 seconds.
Modbus and BACnet Configuration
- Modbus RS485: Set address, baud rate, parity, mode, stop bits, and termination.
- BACnet MSTP: Configure device ID, MAC ID, max master, and baud rate.
- BACnet IP: Set device ID, SSID, password, and port for seamless integration into your network.
Certifications and Warranty
- CE Certified: Complies with European standards for safety and performance.
- Made in Slovenia: Designed and manufactured in the EU.
- 1-Year Warranty: Backed by a comprehensive warranty for peace of mind.
Modbus Registers
- Input Registers: For reading measured values (e.g., temperature, humidity, VOC, CO2, pressure, etc.).
- Holding Registers: For setting offsets via Modbus communication.
BACnet Settings
- BACnet MSTP: Configure device ID, MAC ID, max master, and baud rate.
- BACnet IP: Set device ID, SSID, password, and port.
Conclusion
The Alledio BACnet Multi Sensor is a versatile and reliable solution for monitoring a wide range of environmental parameters, including temperature, humidity, VOC, CO2, pressure, and occupancy. With seamless integration via Modbus RS485, BACnet MSTP, and BACnet IP protocols, it effortlessly connects to advanced building management systems, providing accurate data for smarter decision-making. Its robust design, auto-calibration features, and easy smartphone configuration make it a user-friendly and efficient choice for modern building automation. Whether for energy efficiency, air quality management, or occupancy monitoring, the Alledio sensor delivers precision, durability, and flexibility, making it an essential tool for optimizing indoor environments.
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