TAC Xenta 701 SCHNEIDER

TAC Xenta 701 SCHNEIDER Input module

Brand：SCHNEIDER Model number：TAC Xenta 701

Country of origin: France Product weight：0.55kg

HS code：853710119

Product Details：

Product Dimensions：

The Schneider Electric TAC Xenta 701 is a legacy network automation controller designed for open, distributed control applications primarily in Building Management Systems (BMS). It is part of the TAC Xenta 700 series, which was heavily utilized for its LonWorks networking capabilities to manage various HVAC, lighting, and access control functions within commercial buildings.

Product Specifications

Product Type: Network Automation Controller (Building Management System Controller).
Network Protocol: Primarily utilizes the LonWorks (Echelon LON) protocol for communication, enabling peer-to-peer communication among devices.
Controller Function: Operates as a primary programmable controller that runs the control strategies for a specific area or set of equipment.
Programming/Configuration: Typically configured and programmed using the TAC Menta graphical programming tool or LonMaker for LonWorks networks.
Input/Output (I/O) Capability: The Xenta 701 is designed to be paired with external I/O modules (like the Xenta 400 or Xenta 280/300/401 series) via a separate dedicated local bus connection, as it often has limited or no integrated I/O points itself.
Communication Ports: Features a LonWorks network port for peer-to-peer and supervisory communication. It may also include an RS-232 port for local connection, service, or connection to specific peripherals.
Memory: Contains integrated memory for storing the application program, configuration data, and operational data logging.
Power Supply: Typically operates on a standard low-voltage AC power source, such as $24 \text{ VAC}$.

Product Advantages

LonWorks Open Protocol: Supports the open LonWorks communication standard, facilitating seamless integration with a wide variety of third-party devices and enabling a truly distributed control architecture.
Distributed Control: Designed for peer-to-peer control, which enhances system reliability and response time. If one controller fails, the rest of the network can often continue to function independently.
Graphical Programming: Utilizes the TAC Menta tool, which simplifies the creation of control logic through a flow-chart-like, graphical interface, making programming more intuitive than traditional text-based coding.
Scalability: Functions as part of a scalable architecture where multiple Xenta controllers can be networked together to manage buildings of any size, from small commercial spaces to large campuses.
Robust Design: Engineered for installation in technical rooms and equipment panels within commercial buildings, offering reliability for critical HVAC and facility operations.

Important Considerations (Precautions)

Legacy Status: The TAC Xenta 701 is a legacy product. Users should be aware that support and availability may be limited, and replacement products (e.g., those based on EcoStruxure Building Operation or newer protocols like BACnet/IP) should be considered for new installations.
Power Requirements: Ensure the controller is supplied with the correct voltage ( $24 \text{ VAC}$ typically) to prevent damage. Disconnect power before installation or maintenance.
I/O Reliance: Since the Xenta 701 often has limited internal I/O, its functionality is heavily reliant on the proper selection and wiring of external I/O modules. The local bus connecting the controller to these modules must be correctly terminated.
Network Planning: Proper LonWorks network planning is crucial, including device addressing, scheduling, and ensuring adherence to bus segment limits (length, number of nodes, and termination).
Programming Tool: Access to the proprietary TAC Menta software and associated engineering tools is required for maintenance, modification, or troubleshooting of the control application.

Product Applications

The TAC Xenta 701 controller is used as a core component in Building Management Systems (BMS), providing the intelligence to automate building functions.

HVAC Control: Running sophisticated control strategies for large air handling units (AHUs), chillers, boilers, central plant equipment, and variable air volume (VAV) systems.
Central Plant Management: Coordinating the operation of multiple pieces of central heating and cooling equipment for optimum efficiency.
Lighting Control Integration: Integrating with networked lighting systems to schedule on/off times and dimming based on occupancy or time of day.
Access Control Supervision: Acting as a supervisory or network controller to coordinate access and security systems, often linking them with HVAC schedules.
Data Center Environmental Control: Providing precision environmental control in smaller data centers or critical equipment rooms.

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