Dwyer Instruments CDTA-5N000 | Carbon Dioxide / Temperature / Humidity Communicating Stat with Set Point and Override | Modbus" and BACnet Output | North American Wall Mount Housing | 5000 PPM Range
The Dwyer CDTA-5N000 is a communicating carbon dioxide, temperature and humidity stat with a 0-5000 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 provides CO₂, humidity and temperature measurement in a single compact device without an integral LCD.
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Part Number: CDTA-5N000
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Product Overview
The Dwyer CDTA-5N000 combines the functions of three room sensors into one compact wall-mounted housing. It measures CO₂, humidity and temperature, while also providing a temperature set point with override functionality.
The CDTA-5N000 provides a 0-5000 PPM CO₂ measurement range and is designed for commercial building automation, HVAC control and demand-controlled ventilation applications. Its North American wall-mount housing is suited to indoor room monitoring where multiple environmental parameters need to be integrated into a building control system.
The device 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 across larger projects.
The RS-485 MAC address can be configured using on-board DIP switches. A second set of DIP switches allows the communication protocol to be selected and can limit access to the setup menu.
The CDTA-5N000 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 also replaceable, helping simplify servicing when required.
Unlike the CDTA-5N000-LCD, this model does not include an integral display. An optional remote display tool is available for setup and service requirements.
Key Benefits
- CO₂, humidity and temperature measurement in one wall-mounted device
- 0-5000 PPM CO₂ range
- Temperature set point with override
- 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 errors
- Replaceable humidity and temperature sensor
- Physical hardware lockout
- Single-beam dual-wavelength NDIR CO₂ sensor
- No integral LCD for applications using centralized building controls
- Genuine Dwyer Instruments stock with free UAE-wide shipping
Who This Product Is Best For
The Dwyer CDTA-5N000 is suited for commercial buildings and HVAC control systems that require communicating CO₂, humidity and temperature measurement without an integral local display.
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 monitoring from one wall device
- Installations where daisy-chained RS-485 communication can reduce wiring requirements
- Applications where a local LCD is not required
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-5N000 measure?
The CDTA-5N000 measures CO₂ from 0-5000 PPM, humidity and temperature, and provides a temperature set point with override functionality.
Which communication protocols does the CDTA-5N000 support?
It supports Modbus RTU and BACnet MS/TP over 2-wire RS-485. The protocol is 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. Units can also be daisy chained to help reduce installation wiring.
How accurate is the CDTA-5N000?
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-5N000 have an LCD display?
No. The CDTA-5N000 does not have an integral LCD. An optional remote display tool is available. The CDTA-5N000-LCD is the corresponding version with an integral LCD.
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 to simplify servicing when required.
What power supply does the CDTA-5N000 require?
The device operates from 10-30 VAC or 10-42 VDC. Power consumption is 0.5 W average and 1.2 W peak.
What is the difference between CDTA-5N000 and CDTA-5N000-LCD?
Both models provide the same communicating CO₂, temperature and humidity functionality, including Modbus RTU and BACnet MS/TP communication. The CDTA-5N000-LCD includes an integral LCD, while the CDTA-5N000 has no integral display and uses an optional remote display tool.
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-5N000 communicating CO₂/temperature/humidity stat, contact General Tech Services LLC.
Call: +971 6 5436933
Website: www.generaltechshop.ae
