CDT-MOD-2000 Multifunctional CO2 transmitters for building automation systems that use Modbus serial communication protocol

Product Details:

Type Multifunctional CO2 Transmitter
Theory NDIR (Non-Dispersive Infrared) CO2 Sensing
Capacity Measuring up to 5000 ppm CO2 (model dependent)
Exterior Material ABS Plastic
Interior Material Electronic Components with NDIR sensor
External Size 80 x 80 x 30 mm (approximate)
Circulation System Passive diffusion
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CDT-MOD-2000 Multifunctional CO2 transmitters for building automation systems that use Modbus serial communication protocol Product Specifications

External Size 80 x 80 x 30 mm (approximate)
Humidifying System Not Included
Humidity Range 0 to 95% RH, non-condensing
Cooling System Not Included
Interior Material Electronic Components with NDIR sensor
Heating System Not Included
Capacity Measuring up to 5000 ppm CO2 (model dependent)
Type Multifunctional CO2 Transmitter
Circulation System Passive diffusion
Controller System Modbus Serial Communication Protocol (RS485)
Exterior Material ABS Plastic
Theory NDIR (Non-Dispersive Infrared) CO2 Sensing
Dehumidifying System Not Included
Temperature Range 0 to 50 C

Product Description

CDT series devices include:

Separate eld congurable Modbus output for each measurement parameter (CO2, rH, T)
One analog output for selected measurement: voltage (0/210 V) or current (420 mA)
2 x 3 touchscreen display
Optional relay output

Specification

Communication:	RS-485 Modbus (RTU)
Accuracy:	CO₂: 40 ppm + 2 % of reading, DC model: 75 ppm or 10 % of reading (whichever is greater) Temperature: <0.5 C Relative humidity: 23 % rH at 050 C and 1090 % rH Total error band includes accuracy, hysteresis and temperature effect over 550 C and 1090 % rH
Measurement elements:	Pt1000 temperature sensor, Non Dispersive Infrared (NDIR) CO₂ sensor, thermoset polymer capacitive sensing element for humidity
Measuring units:	ppm, C, % rH
Calibration:	Automatic self-calibration, ABC Logic^TM or continuous comparison (DC)
Supply voltage:	24 VDC/VAC 10 %
Current consumption:	max 90 mA (at 24 V) + 10 mA for each voltage output or 20 mA for each current output
Output signal 1:	0/210 V (linear to CO₂), L min 1 k or 420 mA (linear to CO₂), L max 500
Output signal 2:	0/210 V (linear to rH), L min 1 k or 420 mA (linear to rH), L max 500
Output signal 3:	0/210 V (linear to Temp), L min 1 k or 420 mA (linear to Temp), L max 500
Optional relay output:	Potential free SPDT 250 VAC, 6 A / 30 VDC, 6 A with adjustable switching point and hysteresis
Operating temperature:	0+50C
Protection standard:	IP20

Precision Monitoring for Indoor Air Quality

The CDT-MOD-2000 uses advanced NDIR technology, enabling precise measurement of carbon dioxide levels in offices, classrooms, and commercial spaces. Its swift response time, reliable baseline correction, and user-programmable features support proactive air quality management, enhancing health and comfort in indoor environments.

Seamless Integration with Building Automation

Built for flexibility, this transmitter communicates via Modbus RTU (RS485), ensuring compatibility with leading building management and HVAC systems. Wall-mounted and compact, it fits discreetly into any room, providing real-time CO2 data for efficient ventilation control and energy optimization.

Long-Term Reliability and Easy Maintenance

Designed for durability, the CDT-MOD-2000 boasts a sensor lifespan exceeding 10 years, minimizing maintenance costs. Features like automatic baseline correction (ABC) and the option for manual offset adjustment streamline upkeep, ensuring ongoing measurement accuracy without frequent intervention.

FAQ's of CDT-MOD-2000 Multifunctional CO2 transmitters for building automation systems that use Modbus serial communication protocol:

Q: How do I install the CDT-MOD-2000 CO2 transmitter in my building?

A: The CDT-MOD-2000 is designed for straightforward wall mounting. Simply fix the unit to a suitable wall at breathing height, following the included instructions. Ensure it is positioned away from direct airflow sources and extreme conditions to maintain accurate CO2 readings.

Q: What benefits does Modbus RTU communication provide for building automation?

A: Modbus RTU (RS485) allows the CDT-MOD-2000 to transmit real-time CO2 data efficiently to building management systems, enabling remote monitoring, seamless integration, and centralized control for improved energy efficiency and indoor air quality.

Q: When should I recalibrate the CO2 transmitter?

A: The device features automatic baseline correction (ABC), reducing the need for frequent recalibration. However, manual offset adjustment is available, and calibration is suggested if readings consistently differ from reference instruments or after extensive use in variable environments.

Q: What is the measurement range and accuracy of the CDT-MOD-2000?

A: The standard model measures CO2 from 0-2000 ppm, while an optional version supports 0-5000 ppm. The transmitter offers high accuracy at (50 ppm + 3% of the reading), making it suitable for professional indoor air quality monitoring applications.

Q: Where can the CDT-MOD-2000 be used within a building?

A: The transmitter is ideal for a variety of indoor environments including offices, schools, commercial buildings, and industrial spaces. Its compact, discreet design and passive diffusion system ensure flexibility of installation without requiring a circulation system.

Q: How quickly does the device respond to changes in CO2 levels?

A: The CDT-MOD-2000 features a rapid response time of less than 90 seconds (to reach 90% of the final value), enabling near real-time air quality monitoring and facilitating timely adjustments in ventilation or HVAC system settings.

Q: What are the main advantages of using the CDT-MOD-2000 for indoor air quality monitoring?

A: Key benefits include high-precision CO2 detection, compatibility with Modbus automation systems, low power consumption, an extended sensor lifespan (over 10 years), simple installation, easy maintenance, and optional visual indicators for status monitoring.

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