TAC Xenta 422 SCHNEIDER

TAC Xenta 422 SCHNEIDER Power module

Product  Description：

The Schneider Electric TAC Xenta 422 is a specific model within the TAC Xenta family of programmable controllers, which are part of the Building Management System (BMS) portfolio. It is primarily a controller for heating, ventilation, and air conditioning (HVAC) applications, designed to integrate inputs and outputs for control of HVAC equipment and systems.

Product Specifications

• Product Type: Programmable Controller, also known as a Unitary Controller.

• Product Series: TAC Xenta 400 series.

• Network Protocol: Communication is typically over the LonTalk protocol via a LonWorks network.

• Power Supply: Generally accepts a low voltage AC or DC input, typically $24 \text{ VAC}$.

• Inputs/Outputs (I/O) Configuration: The Xenta 422 features a fixed number of physical I/O points for direct connection to sensors and actuators.

  • Universal Inputs: A set number of inputs (usually 8) configurable for reading temperature sensors, voltage ($0-10 \text{ VDC}$), or dry contact status.

  • Digital Outputs: A set number of binary outputs (usually 4) typically triac type for switching loads like small relays or damper actuators.

  • Analog Outputs: A set number of analog outputs (usually 4) providing $0-10 \text{ VDC}$ signals for controlling variable speed drives or modulating actuators.

• Controller Type: Freely programmable via the TAC Menta graphical programming tool or similar software, allowing for custom control strategies.

• Physical Mounting: Designed for DIN rail mounting inside a control panel.

• Display/Interface: Typically includes diagnostic LEDs for status indication and network communication.

Product Advantages

• LonWorks Integration: Provides native support for the LonTalk communication protocol, allowing for seamless integration into a LonWorks-based BMS, facilitating peer-to-peer communication with other controllers.

• Flexibility in Programming: The use of graphical programming environments like TAC Menta allows users to develop highly customized and complex control logic tailored to specific HVAC applications without requiring text-based coding.

• Versatile I/O: The configuration of Universal Inputs minimizes the need for different controller models, as a single unit can handle a variety of sensor types (temperature, pressure, contact status).

• Reliability: Built for continuous operation in building automation environments, offering a robust and stable control platform for critical HVAC equipment.

• Application Focus: Specifically designed with the needs of HVAC control in mind, making it an efficient solution for controlling air handling units (AHUs), fan coil units (FCUs), and central plant equipment.

Important Considerations (Precautions)

• Legacy Status: The TAC Xenta line, including the 422, is considered a legacy platform following Schneider Electric's acquisition of TAC. Users should be aware that support and availability may be transitioning, and newer installations often utilize the EcoStruxure platform (e.g., SmartStruxure, SpaceLogic) controllers.

• Network Integrity: Proper LonWorks network wiring (topology, termination, length) is crucial for reliable communication. Adherence to LonWorks standards is necessary to avoid network errors.

• Software Requirements: The controller requires specific engineering tools like TAC Menta and the TAC Vista or EcoStruxure Building Operation software for configuration, commissioning, and system management.

• Power Isolation: It is essential to ensure that the $24 \text{ VAC}$ power supply to the controller and any field devices connected to its outputs are properly sized and isolated to prevent ground loops and equipment damage.

• I/O Sizing: Ensure that the current and voltage requirements of the connected actuators and loads do not exceed the specified limits of the controller's digital and analog outputs.

Product Applications

The TAC Xenta 422 controller is utilized as the primary control device in various building automation applications, particularly for managing the climate control elements of a facility.

• Air Handling Unit (AHU) Control: Controlling the sequence of operations for AHUs, including mixing box dampers, heating and cooling coils, fan status, and filter alarms.

• Central Plant Equipment: Managing components of a chiller or boiler plant, such as pump staging, cooling tower control, and primary loops.

• Variable Air Volume (VAV) Terminal Units: While often used for larger unitary applications, it can be applied to complex VAV systems to manage reheat, zone temperature, and air flow.

• Custom HVAC Systems: Due to its programmability, it is suitable for unique or proprietary HVAC systems where off-the-shelf control sequences are insufficient.

• Integration with BAS: Serving as the field device controller that reports back to a central Building Automation System (BAS) server for system-wide monitoring, trending, and alarm management.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

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

Warranty: one year

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