CD-311-U00-00U Johnson Controls Room Carbon Dioxide, Humidity, and Temperature Transmitters

Overview

The CD-311-U00-00U is a wall-mounted room transmitter from Johnson Controls designed to monitor carbon dioxide (CO2), relative humidity (RH), and temperature. This model features an integrated digital LCD display for real-time local monitoring of environmental conditions. It utilizes advanced sensing technologies, including a dual-channel non-dispersive infrared (NDIR) sensor for CO2, to provide accurate and reliable data for building automation systems, ensuring optimal indoor air quality and energy efficiency.

Features

• Triple Sensing Capability: Measures CO2, humidity, and temperature in a single low-profile enclosure.
• Integrated LCD Display: Features a 2-line alpha-numeric digital display for local viewing of sensor data and configuration menus.
• Self-Calibration: Includes a self-calibration feature for the CO2 sensor to correct for long-term drift in typical office environments.
• Field-Selectable Outputs: Provides three analog outputs that are field-selectable for either 0-5 VDC or 0-10 VDC.
• High Accuracy: Employs a precision NTC thermistor for temperature and a thermoset polymer-based capacitance sensor for humidity.
• Easy Installation: Designed for mounting directly to a wall or a single-gang electrical box with screw terminal block connections.
• Flexible Configuration: Allows for altitude correction and adjustable CO2 measurement ranges through the user interface.

Specifications

• Power Supply: 20-28 VAC/VDC, non-isolated half-wave rectified.
• CO2 Measurement Range: 0 to 2,000 ppm (default), adjustable up to 10,000 ppm.
• CO2 Accuracy: +/- 30 ppm + 3% of measured value.
• Temperature Range: 32°F to 122°F (0°C to 50°C).
• Temperature Accuracy: +/- 0.36°F (+/- 0.2°C).
• Humidity Range: 0% to 100% RH, non-condensing.
• Humidity Accuracy: +/- 2% RH.
• Output Signals: 0-5 VDC or 0-10 VDC (field-selectable).
• Enclosure Rating: IP30 (NEMA 1), white ABS/PC material.
• Dimensions: 4.7 in. x 3.3 in. x 1.15 in. (119 mm x 84 mm x 29 mm).

Applications

• Commercial Buildings: Ideal for demand-controlled ventilation (DCV) in offices and schools to maintain air quality while reducing energy costs.
• Healthcare Facilities: Monitoring environmental conditions in laboratories and patient rooms.
• Manufacturing: Ensuring precise climate control in facilities where temperature and humidity balance is critical.
• Building Automation: Integrates directly with Building Automation Systems (BAS) like Facility Explorer or other controllers using 0-10V analog inputs.