Schneider SpaceLogic SCD2XP2AVX Duct CO2 Temp RH VOC Sensor BACnet Modbus

The SpaceLogic SCD2XP2AVX is a cutting-edge, duct-mounted multi-sensor platform engineered to meet the stringent indoor air quality (IAQ) monitoring specifications of green building certifications, including LEED, WELL, and RESET. This advanced device combines four critical atmospheric parameters—Carbon Dioxide (CO2), Relative Humidity (RH), Temperature, and Volatile Organic Compounds (VOCs)—into a single, highly integrated duct probe. By consolidating these four sensors into one unit and utilizing BACnet MS/TP and Modbus RTU communications, the SCD2XP2AVX dramatically reduces hardware acquisition costs, minimizes installation labor, and optimizes valuable BAS controller physical ports.

• Protocol / Communication: Multi-protocol auto-detectable RS-485 interface supporting BACnet MS/TP and Modbus RTU protocols. Selectable baud rates up to 115200 bps, configured via DIP switch or software.
• I/O Points & Signals: Digital bus-only interface mapping CO2 (ppm), relative humidity (%), temperature (°C/°F), and VOC index/equivalent readings directly to BMS software objects.
• Power Supply / Voltage: 24 VAC ±15% (50/60 Hz) or 20 to 30 VDC, Class 2 circuit, maximum power consumption of 2.5W.
• Sensor Parameters & Accuracy:
  • CO2 Sensing: Non-Dispersive Infrared (NDIR) sensor with Automatic Baseline Calibration (ABC) algorithm to mitigate drift over time. Range: 0 to 2000 ppm. Accuracy: ±30 ppm ±3% of reading.
  • VOC Sensing: Advanced Metal Oxide Semiconductor (MOS) gas-sensor technology. Range: 0 to 1000 ppb (or mapped equivalent eCO2). Highly sensitive to organic solvents, cleaning agents, and smoke.
  • Humidity & Temperature: Digitally calibrated capacitive sensor. Humidity accuracy: ±2% RH. Temperature accuracy: ±0.2°C (32 to 122°F).
• Regulatory & Certifications: UL 916 Energy Management, CE, RCM, FCC Class B, ICES-003, RoHS, aligned with LEED/WELL specifications.
• Enclosure & Material: IP65 flame-retardant ABS enclosure (UL94-V0). Probe depth is adjustable, fitted with a high-durability sensor protection cap.

1. Demand-Controlled Ventilation (DCV): Installed in central return air ducts of modern green office buildings to dynamically regulate fresh outdoor air dampers based on occupied CO2 and VOC spikes, maximizing energy savings.
2. Educational High-Density Air Control: Mounted in classrooms, lecture halls, and auditorium return ducts to track CO2 buildup, preventing drowsiness and fatigue.
3. Medical Facility VOC Extraction: Deployed in laboratory exhaust vents and clinical treatment facilities to monitor chemical off-gassing and VOC concentrations, ensuring adequate room ventilation rates.