TAC Xenta 301 SCHNEIDER

TAC Xenta 301 SCHNEIDER Input module

Brand：SCHNEIDER Model number：TAC Xenta 301

Country of origin: France Product weight：0.55kg

HS code：853710119

Product Details：

Product Dimensions：

The Schneider Electric TAC Xenta 301 is a high-performance, freely programmable controller designed for use in the TAC I/A Series building management system (BMS), specifically targeting sophisticated control applications in heating, ventilation, and air conditioning (HVAC) systems. It functions as a flexible and powerful device for regulating complex HVAC equipment.

Product Specifications

Product Type: Programmable Controller/Unitary Controller
Product Line: TAC Xenta
Network Communication: Standard open protocol LONWORKS (Local Operating Network).
Programming: Freely programmable using the TAC Menta graphical programming tool.
Inputs/Outputs: The controller features a fixed set of I/O points:

Inputs: 10 inputs in total. This typically includes a mix of Universal Inputs (UI) for analog or digital signals (thermistor, voltage, current, dry contact) and dedicated Digital Inputs (DI).
Outputs: 6 outputs in total. This typically includes a mix of Analog Outputs (AO) for modulating control (e.g., $0-10 \text{ VDC}$ ) and Digital Outputs (DO) for on/off control (e.g., relay outputs).

Power Supply: Typically operates on $24 \text{ VAC}$ .
Clock Function: Includes a built-in real-time clock for scheduling and time-based control functions.
Optional Modules: Can be equipped with an optional TAC Xenta OP operator panel for local access, parameter adjustment, and overriding control.
Memory: Features non-volatile memory for retaining the application program and configuration data.
Mounting: Designed for DIN rail mounting.

Product Advantages

Full Programmability: Unlike fixed-function controllers, the TAC Xenta 301 is fully programmable using the intuitive TAC Menta graphical software, allowing users to create highly customized and efficient control strategies tailored to specific equipment and client needs.
LONWORKS Open Protocol: The use of the standard LONWORKS protocol ensures interoperability with other LONWORKS-compatible devices and systems, promoting future-proofing and flexibility in system expansion.
Integrated Control: The combination of various input and output types allows the controller to handle both analog (modulating) and digital (on/off) control loops, making it suitable for complex unitary applications like air handling units (AHUs) or central plant equipment.
Distributed Intelligence: As a peer-to-peer LONWORKS device, the Xenta 301 offers distributed control intelligence, meaning control logic remains resident on the local device, ensuring reliable operation even if the central server connection is temporarily lost.
Time Functions: The integrated clock allows for precise scheduling, optimal start/stop calculations, and holiday programming, enhancing energy efficiency.

Important Considerations (Precautions)

Programming Expertise: Due to its fully programmable nature, proper configuration and programming using the TAC Menta software require trained and qualified technical personnel to ensure the control logic functions correctly and safely.
Terminal Base: The Xenta 301 typically requires a separate Xenta terminal base for wiring connections. Ensure the correct terminal base is used and securely installed before wiring.
Power Isolation: Always ensure the $24 \text{ VAC}$ power supply is correctly rated and isolated as per local electrical codes. Disconnect power before wiring or servicing the controller to prevent electric shock.
Documentation: Carefully review the I/O point mapping and controller documentation to ensure field devices are connected to the correct terminal points. Incorrect wiring can damage the controller or field equipment.
System Compatibility: While LONWORKS is open, integration with the overall TAC I/A Series system may require specific versions of the network managers and visualization software (like TAC Vista) for full functionality.

Product Applications

The TAC Xenta 301 controller is ideally suited for unitary and plant control applications within commercial and institutional buildings.

Air Handling Units (AHUs): Controlling the sequence of operation for AHUs, including mixing, filtering, heating, cooling, fan speed control (VSD), and damper actuation.
Boiler and Chiller Plant Control: Managing the staging, optimization, and safety interlocks for central heating (boiler) and cooling (chiller) plant equipment.
Fan Coil Units (FCUs) and Variable Air Volume (VAV) Systems: Providing sophisticated local loop control for individual terminal units or zones, though it is often considered an advanced controller for larger terminal units.
Pumps and Primary Loops: Controlling the operation of circulation pumps, condenser loops, and associated valves and actuators in plant rooms.
General Equipment Control: Any complex HVAC equipment requiring precise, custom-engineered control sequences and integration into a larger building management system.

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