TAC Xenta 302 SCHNEIDER Interface module

Description

TAC Xenta 302 SCHNEIDER Interface module

Product Dimensions：

Product Description

The TAC Xenta 302 is a versatile, programmable automation controller designed to execute complex control strategies for individual systems or zones within a building automation network. It is a standalone “brain” that operates independently of a central server, ensuring reliable local control.

• Type: LonWorks Network Variable (NV) Programmable Controller.

• Function: It executes a custom application program created with the TAC Menta® graphical engineering tool. It controls HVAC equipment like Air Handling Units (AHUs), Variable Air Volume (VAV) boxes, and chilled water loops.

• Networking: It uses the LonWorks (LonMark) protocol for communication, allowing it to seamlessly share data with other Xenta controllers, I/O modules (like Xenta 421/422), sensors, and the building supervisor (e.g., TAC Vista).

• I/O Configuration: The Xenta 302 comes with a fixed, medium-density set of integrated inputs and outputs, making it ideal for standard packaged equipment control.

Product Specifications

Product Advantages

• Standalone Intelligence: As a powerful controller, it provides autonomous control. If the network communication is lost, the Xenta 302 continues to run its programmed sequence, maintaining critical system operation.

• Balanced I/O: The configuration of 4 UIs, 4 UOs, and 4 DOs provides a balanced mix of analog, digital, and modulating control capabilities, making it highly versatile for many common HVAC applications.

• Universal Outputs (UO): The ability to select $0-10\,\text{V}$ (modulating) or Triac (digital) output type on the same terminal provides engineering flexibility and reduces the need for specialized modules.

• LonWorks Standard: Provides interoperability with a vast ecosystem of LonMark certified products and easy integration into existing Schneider Electric/TAC systems.

• Graphical Programming: Utilizing the TAC Menta graphical software simplifies the creation, debugging, and maintenance of control applications.

Precautions

• Programming Required: The Xenta 302 is not a fixed-function controller. It requires a custom control program to be developed and downloaded using the TAC Menta software before it can perform any control functions.

• UO Configuration: Great care must be taken to correctly set the Universal Outputs (UOs) as either $0-10\,\text{V}$ (for VFDs/valves) or Triac (for on/off loads). Using an analog output setting for a digital load, or vice-versa, can lead to equipment malfunction.

• Relay Protection: The Relay Digital Outputs (DOs) are rated for $2\,\text{A}$ max. Always use external interposing relays or contactors when controlling loads that draw more than $2\,\text{A}$ or operate at voltages above $250\,\text{V AC}$.

• Grounding and Shielding: To ensure reliable communication and stable analog signals, proper grounding and shielding of the LonWorks network and sensor wiring must be implemented.

• Firmware/Tools: Ensure the controller firmware is compatible with the version of TAC Menta and the supervisory system (e.g., TAC Vista) being used for engineering.

Product Applications

The TAC Xenta 302 is widely used for controlling medium-complexity HVAC equipment found in commercial, industrial, and institutional buildings.

• Packaged Rooftop Unit (RTU) Control:

  • Monitoring return/supply air temperature (UIs).

  • Controlling cooling stages (DOs/UOs).

  • Modulating dampers or VFDs (UOs).

• VAV (Variable Air Volume) Systems:

  • Serving as the VAV box controller, managing damper position (UO), reheat valve (UO/DO), and monitoring room temperature (UI).

• Boiler/Chiller Plant Optimization:

  • Managing the sequencing and staging of smaller boilers or chillers.

• General System Control:

  • Executing time schedules, holiday calendars, and trend logging for local equipment.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Please make an inquiry for more models：