Dwyer Instruments CDTA-5N000-LCD | Carbon Dioxide / Temperature / Humidity Communicating Stat with Set Point and Override | Modbus" and BACnet Output | North American Wall Mount Housing | 5000 PPM Range | LCD Display
The Dwyer CDTA-5N000-LCD is a communicating carbon dioxide, temperature and humidity detector with 0-5000 PPM CO₂ measurement, temperature set point and override, and an integral LCD display. Designed for North American wall mounting, it supports field-selectable Modbus RTU and BACnet MS/TP communication over 2-wire RS-485.
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Part Number: CDTA-5N000-LCD
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Product Overview
The Dwyer CDTA-5N000-LCD combines the functions of CO₂, humidity and temperature room sensors in a single compact wall-mounted housing. It measures CO₂ from 0 to 5000 PPM, humidity from 0 to 100% RH, and temperature, while also providing a temperature set point with override functionality.
The communicating design supports both Modbus RTU and BACnet MS/TP, selectable in the field using on-board DIP switches. Communication is provided through 2-wire RS-485, while the overall installation uses a four-wire connection for power and communication. Multiple units can be daisy chained, helping reduce wiring and installation costs in larger building-control projects.
An integral LCD provides local visibility of measured conditions, while the physical hardware lockout helps prevent unauthorized configuration changes. The RS-485 MAC address can be set using DIP switches, with a second DIP switch bank used to select the communication protocol and restrict access to the setup menu.
The CDTA-5N000-LCD uses a single-beam, dual-wavelength NDIR CO₂ sensor with a 15-year light source. Dwyer's Digital Intelligent Temperature Compensation Algorithm (DITCA™) helps compensate for measurement errors caused by self-heating in combination wall sensors.
The humidity and temperature sensor is replaceable, helping simplify servicing over the product's operating life. The device 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 that do not require an integral display, the CDTA-5N000 provides the corresponding configuration without the LCD.
Key Benefits
- Measures CO₂, humidity and temperature in one wall-mounted device
- 0-5000 PPM CO₂ measurement range
- Temperature set point with override functionality
- Field-selectable Modbus RTU or BACnet MS/TP
- 2-wire RS-485 communication
- Four-wire installation with daisy-chain capability
- Integral LCD for local measurement visibility
- DITCA™ compensation for self-heating effects
- Replaceable humidity and temperature sensor
- Physical hardware lockout
- Single-beam dual-wavelength NDIR CO₂ sensor
- Suitable for demand-controlled ventilation and building automation applications
- Genuine Dwyer Instruments stock with free UAE-wide shipping
Who This Product Is Best For
The Dwyer CDTA-5N000-LCD is suited for commercial buildings and HVAC control systems requiring a communicating room sensor for CO₂, humidity and temperature monitoring.
It is particularly useful for:
- Building automation systems using BACnet MS/TP or Modbus RTU
- Demand-controlled ventilation applications
- Commercial HVAC control
- Projects requiring CO₂, humidity and temperature measurement from one wall device
- Installations where daisy-chained RS-485 communication can reduce wiring requirements
- Facilities requiring local readings through an integral LCD
How to Specify & Commission It
- Mount the North American wall housing at the selected indoor location and complete 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 access to the setup menu as required.
- Program 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 with the controller before commissioning.
Frequently Asked Questions
What does the Dwyer CDTA-5N000-LCD measure?
It measures CO₂ from 0-5000 PPM, humidity from 0-100% RH, and temperature. It also provides a temperature set point with override functionality.
Which communication protocols does the CDTA-5N000-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 CDTA-5N000-LCD uses a four-wire connection for power and communication. Multiple devices can also be daisy chained to help reduce installation wiring.
Does the CDTA-5N000-LCD have an LCD display?
Yes. The CDTA-5N000-LCD includes an integral LCD display for local viewing of measured conditions.
What is the CO₂ accuracy of the CDTA-5N000-LCD?
CO₂ accuracy is ±3% of reading ±40 PPM. Relative humidity accuracy is ±2%, while temperature accuracy is ±1°C (±1.8°F) at 25°C.
What type of CO₂ sensor does it use?
The device 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, helps compensate for measurement errors caused by self-heating in combination wall sensors.
What is the difference between CDTA-5N000-LCD and CDTA-5N000?
The CDTA-5N000-LCD includes an integral LCD display, while the CDTA-5N000 is the corresponding configuration without the integral LCD.
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-5N000-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.
Is genuine Dwyer stock available with UAE shipping?
Yes. Genuine Dwyer Instruments stock with free UAE-wide shipping is available. Call +971 6 5436933 for current pricing and availability.
Request a Quote Today
For pricing, availability or technical assistance with the Dwyer CDTA-5N000-LCD communicating CO₂/temperature/humidity stat, contact General Tech Services LLC.
Call: +971 6 5436933
Website: www.generaltechshop.ae
