Dwyer Instruments CDTA-2N000-LCD | Carbon Dioxide / Temperature / Humidity Communicating Stat with Set Point and Override | Modbus" and BACnet Output | North American Wall Mount Housing | 2000 PPM Range | LCD Display
The Dwyer CDTA-2N000-LCD is a communicating carbon dioxide, temperature and humidity stat with a 0-2000 PPM CO₂ range, temperature set point and override, and field-selectable Modbus RTU or BACnet MS/TP communication. Designed for North American wall mounting, it includes an integral LCD display for local viewing of measured conditions.
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Part Number: CDTA-2N000-LCD
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Product Overview
The Dwyer CDTA-2N000-LCD combines the functions of CO₂, humidity and temperature room sensors in one compact wall-mounted device. It measures CO₂ from 0 to 2000 PPM, humidity from 0 to 100% RH, and temperature, while also providing a temperature set point with override functionality.
This model is the North American wall-mount version with an integral LCD display, providing local visibility of measured conditions while communicating with building automation and HVAC control systems.
The CDTA-2N000-LCD supports field-selectable Modbus RTU and BACnet MS/TP communication over 2-wire RS-485. A four-wire connection is used for power and communication, and multiple units can be daisy chained to help reduce installation and wiring costs.
The RS-485 MAC address is configured using on-board DIP switches. A second DIP switch bank allows selection of the communication protocol and can restrict access to the setup menu.
The device incorporates Dwyer's Digital Intelligent Temperature Compensation Algorithm (DITCA™), which compensates for errors caused by self-heating in combination wall sensors. The humidity and temperature sensor is replaceable, while a physical hardware lockout helps protect configuration settings.
The CDTA-2N000-LCD uses a single-beam, dual-wavelength NDIR CO₂ sensor with a 15-year light source. It operates from 10-30 VAC or 10-42 VDC, with average power consumption of 0.5 W and peak consumption of 1.2 W.
For applications where an integral display is not required, the CDTA-2N000 provides the corresponding configuration without the LCD.
Key Benefits
- CO₂, humidity and temperature measurement in one wall-mounted device
- 0-2000 PPM CO₂ range
- Temperature set point with override
- Integral LCD display
- Field-selectable Modbus RTU or BACnet MS/TP
- 2-wire RS-485 communication
- Four-wire power and communication connection
- Daisy-chain capability for multiple devices
- DITCA™ compensation for self-heating effects
- Replaceable humidity and temperature sensor
- Physical hardware lockout
- Single-beam dual-wavelength NDIR CO₂ sensor
- Genuine Dwyer Instruments stock with free UAE-wide shipping
Who This Product Is Best For
The Dwyer CDTA-2N000-LCD is suited for commercial buildings and HVAC control systems that require CO₂, humidity and temperature monitoring together with building automation communication and local display capability.
It is particularly useful for:
- Commercial buildings using BACnet MS/TP or Modbus RTU
- Demand-controlled ventilation systems
- Building automation and HVAC control
- Projects requiring CO₂, humidity and temperature from one wall-mounted device
- Installations where daisy-chained RS-485 communication can reduce wiring requirements
- Applications requiring local readings through an integral LCD
How to Specify & Commission It
- Mount the North American wall housing at the selected indoor location and route the four-wire power and communication connection.
- Set the RS-485 MAC address using the on-board DIP switches.
- Select Modbus RTU or BACnet MS/TP and configure setup-menu access as required.
- Program the barometric pressure for the installation altitude and configure the required set-point and override functions.
- Connect the device to the building automation or HVAC controller.
- Verify the CO₂, humidity and temperature readings and confirm communication before commissioning.
Frequently Asked Questions
What does the Dwyer CDTA-2N000-LCD measure?
The CDTA-2N000-LCD measures CO₂ from 0-2000 PPM, humidity and temperature, and provides a temperature set point with override functionality.
Which communication protocols does the CDTA-2N000-LCD support?
It supports Modbus RTU and BACnet MS/TP over 2-wire RS-485. The communication protocol can be selected using the on-board DIP switches.
How many wires are needed for installation?
The device uses a four-wire connection for power and communication. Multiple units can also be daisy chained to help reduce installation wiring.
How accurate is the CDTA-2N000-LCD?
CO₂ accuracy is ±3% of reading ±40 PPM, relative humidity accuracy is ±2%, and temperature accuracy is ±1°C (±1.8°F) at 25°C.
Does the CDTA-2N000-LCD have a display?
Yes. This model includes an integral LCD display for local viewing of measured conditions.
What type of CO₂ sensor does it use?
It uses a single-beam, dual-wavelength NDIR CO₂ sensor with a 15-year light source.
What is DITCA™?
DITCA™, or Digital Intelligent Temperature Compensation Algorithm, compensates for errors caused by self-heating in combination wall sensors.
Is the humidity and temperature sensor replaceable?
Yes. The humidity and temperature sensor is replaceable, helping simplify servicing when required.
What power supply does the CDTA-2N000-LCD require?
It operates from 10-30 VAC or 10-42 VDC. Average power consumption is 0.5 W, with a peak consumption of 1.2 W.
What is the difference between CDTA-2N000-LCD and CDTA-2N000?
Both models provide communicating CO₂, humidity and temperature measurement with Modbus RTU and BACnet MS/TP communication. The CDTA-2N000-LCD includes an integral LCD, while the CDTA-2N000 does not.
Is genuine stock available with UAE shipping?
Yes. Genuine Dwyer Instruments stock with free UAE-wide shipping is available. Call +971 6 5436933 for pricing and current availability.
Request a Quote Today
For pricing, availability or technical assistance with the Dwyer CDTA-2N000-LCD communicating CO₂/temperature/humidity stat, contact General Tech Services LLC.
Call: +971 6 5436933
Website: www.generaltechshop.ae
