CDT-MOD-2000 Duct

CO2 transmitters with temperature output for duct that use Modbus serial communication protocol

CDT-MOD-2000 Duct combines CO2 and temperature measurements in one device installed in air ventilation duct. Illuminated display ensures easy readability also from a distance. The CDT-MOD-2000 Duct has a screwless lid and an easily adjustable mounting flange that make the installation of the device easy.

The CDT-MOD-2000 Duct series transmitters calibrate themselves automatically using ABCTM logic. The ABCTM logic requires that the space in which the transmitter is used needs to to be unoccupied for four hours per day so that the indoor CO2 concentration drops to the outside level. CDT-MOD-2000-DC Duct is a dual channel model with a measuring channel and a reference channel that makes a continuous comparison and the necessary adjustment accordingly. CDT-MOD-2000-DC Duct is also suitable for buildings
that are continuously occupied.

CDT-MOD-2000 Duct series devices include:
• Separate Modbus output for each measurement parameter (CO2 and T)
• Mounting flange
• Clear backlit display

Technical details

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
Measurement elements: NTC10k temperature sensor, Non Dispersive Infrared (NDIR) CO2 sensor
Measuring units: ppm, °C
Calibration: Automatic self-calibration, ABC LogicTM or continuous comparison (DC)
Supply voltage: 24 VDC/VAC ±10 %
Current consumption: max 230 mA (at 24 V) + 10 mA for each voltage output
Output signal 1: 0/2…5/10 V (linear to CO2), L min 1 kΩ
Output signal 2: 0/2…5/10 V (linear to T), L min 1 kΩ
Operating temperature: 0...+50 °C
Protection standard: IP54

CDT-MOD-2000 Duct

Example
CDT2000 Duct-D

Model

Product series

CDT2000
Carbon dioxide transmitter, analog outputs
CDT-MOD-2000
Carbon dioxide transmitter, Modbus communication
CDT-MOD-2000

Calibration

ABC logic™, Automatic Background Calibration
-DC
Dual channel, for continuously occupied space

Mounting

Duct
Duct mount
Duct

Display

-D
With display
Without display
-D