Siemens Building Technology QPA2284.FWSC Sensor

The Siemens QPA2284.FWSC is a high-performance multi-sensor room unit engineered specifically for integration with Siemens Terminal Equipment Controllers (TEC). This full-featured HMI device streamlines indoor air quality management by simultaneously monitoring CO2 concentration, relative humidity, and room temperature. Designed for professional HVAC installations, it features a 0-2000 PPM CO2 range utilizing NDIR (Non-Dispersive Infrared) technology to ensure long-term stability without frequent field recalibration. The integrated OLED display provides real-time feedback, while the setpoint adjustment and override buttons allow for immediate localized control of the occupied space. For technicians, the built-in tool port and RJ-11 connection type facilitate rapid commissioning and diagnostics using the Siemens Passkey or WCIS software. This sensor is the standard for demand-controlled ventilation (DCV) in commercial environments, ensuring optimal IAQ (Indoor Air Quality) compliance and energy efficiency through precise P1 communication with the PTEC or ATEC architecture.

Key Benefits:

• Triple-Sensing Capability: Consolidates carbon dioxide, humidity (P1), and temperature (P1) sensing into a single wall-mounted unit to reduce installation labor.
• Optimized for TEC: Engineered exclusively for Siemens Terminal Equipment Controllers, ensuring 100% protocol compatibility and seamless RJ-11 plug-and-play setup.
• High-Accuracy IAQ Monitoring: Features a 0-2000 PPM CO2 sensor with an accuracy of ±50 ppm + 2% of measured value for precise ventilation control.
• Local Operator Interface: Equipped with a backlit display and override functionality, allowing occupants to adjust comfort levels within technician-defined limits.
• Maintenance-Friendly Design: The accessible tool port permits direct connection for HVAC balancing and configuration without removing the sensor from the wall.

Common Questions: Is the Siemens QPA2284.FWSC compatible with third-party controllers? No, the QPA228x series is designed specifically for Siemens TEC and PTEC controllers using the P1 communication protocol via an RJ-11 connection. Does this sensor require an external power supply? While temperature sensing is typically powered via the P1 port, models with CO2 and humidity sensing often require the AQM2200 Power Module or a 24V supply to support the active sensing elements. How is the CO2 sensor calibrated? The unit utilizes NDIR technology designed for long-term stability. While it is generally maintenance-free, field offsets can be adjusted through the Passkey tool port if required by specific local IAQ standards.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.