TAC Xenta 400 0-073-0902-0 SCHNEIDER Input module
Brand:SCHNEIDER Model number:TAC Xenta 400 0-073-0902-0
Country of origin: France Product weight:0.55kg
HS code:853710119
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The Schneider Electric TAC Xenta 400 (specifically part number 0-073-0902-0) is a high-performance microprocessor-based controller designed for use within the TAC Xenta family of building management systems. It functions as a versatile and programmable controller that can serve as a standalone unit or as a distributed node within a larger LonWorks network. This device is specifically engineered to handle complex control strategies for heating, ventilation, air conditioning (HVAC), and other building utility systems. By utilizing the LonTalk communication protocol, it ensures seamless integration with other LonMark certified devices, providing a scalable and open architecture for smart building automation.
The TAC Xenta 400 is powered by a $24 \text{ VAC}$ supply at $50/60 \text{ Hz}$ or a $19$ to $40 \text{ VDC}$ source. It features a high-speed $10 \text{ MHz}$ processor and significant memory capacity, including $256 \text{ KB}$ of Flash memory for the operating system and application software, and $128 \text{ KB}$ of RAM for data storage. The communication interface relies on a FTT-10A Free Topology Transceiver operating at $78 \text{ kbps}$, which simplifies wiring in complex network environments. The unit is designed for DIN rail mounting and carries an IP20 protection rating. Its environmental tolerance ranges from $0$ to $50^{\circ}\text{C}$ ($32$ to $122^{\circ}\text{F}$) during operation. The 0-073-0902-0 model is a base unit that typically supports up to 10 Xenta I/O modules, allowing for a total capacity of up to 100 I/O points depending on the configuration.
One of the primary advantages of the TAC Xenta 400 is its extreme flexibility. It can be programmed using the TAC Menta graphical software tool, which allows engineers to create sophisticated control logic without deep coding knowledge. Its compatibility with LonWorks makes it an open-system solution, preventing vendor lock-in and allowing it to coexist with third-party devices. The controller also features modular expansion capabilities; as the needs of a facility grow, users can simply add I/O modules rather than replacing the entire controller. Additionally, it supports a local operator panel (TAC Xenta OP) which can be plugged directly into the unit for on-site monitoring, setpoint adjustment, and manual overrides without the need for a laptop.
When installing or maintaining the TAC Xenta 400, it is crucial to ensure that the power supply meets the specified voltage requirements to prevent internal component damage. Because it is an electronic device with an IP20 rating, it must be installed in a clean, dry environment, such as a locked control cabinet, to protect it from dust and moisture. Static electricity can damage the sensitive internal circuitry, so technicians should use proper grounding techniques when handling the unit. It is also important to note that the LonWorks network requires specific termination resistors at the ends of the segments to maintain signal integrity. Users should ensure that the application software and firmware versions are compatible when replacing an older unit with a new 0-073-0902-0 module.
The TAC Xenta 400 is widely deployed in commercial and industrial building automation projects. It is commonly used for controlling large Air Handling Units (AHUs), central heating plants, and chilled water systems. Its ability to process complex calculations makes it ideal for energy management tasks, such as optimal start/stop routines and load shedding. In large office buildings or hospitals, it often serves as a zone controller, managing multiple rooms or specialized laboratory environments where precise temperature and pressure control are required. Beyond HVAC, it can also be integrated into lighting control and basic security monitoring systems, providing a unified control interface for facility managers.

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