007300300 Schneider TAC Xenta 281 LonWorks Programmable DDC Controller HVAC Zone Control Unit LonTalk

Product Summary
Schneider TAC Xenta 281 LonWorks Programmable DDC Controller Order Number: 007300300 | HVAC Zone Control Unit with LonTalk Protocol Product Overview The TAC Xenta 281 is a freely programmable controller from the Schneider Electric Xenta 280 family, designed for zone control and small heating and air ...
Basic Properties
Place of Origin: EU
Brand Name: Schneider
Certification: CE RoHS
Model Number: 007300300
Trading Properties
Minimum Order Quantity: 5
Payment Terms: T/T
Product Description
Schneider TAC Xenta 281 LonWorks Programmable DDC Controller
Order Number: 007300300 | HVAC Zone Control Unit with LonTalk Protocol
Product Overview
The TAC Xenta 281 is a freely programmable controller from the Schneider Electric Xenta 280 family, designed for zone control and small heating and air handling systems. Positioned between plant room controllers and terminal unit controllers, it offers sufficient capacity for small air handling units or zones with independent heating and cooling. Unlike configurable devices, it is programmed to match specific installation requirements using custom sequences.
Communication is established via LonWorks using the LonTalk protocol, a field bus system widely deployed in commercial and institutional buildings before BACnet became predominant. These controllers remain relevant as replacement parts due to their extensive historical deployment.
Technical Specifications
Product Type Freely programmable DDC controller
Order Number 007300300
Model TAC Xenta 281
Family TAC Xenta 280 series
Intended Duty Zone control and small heating and air handling systems
Programmability Freely programmable with HVAC function blocks
Communication LonWorks, LonTalk protocol with TAC proprietary protocol support
Supply Voltage 24 V AC ±20%, 50/60 Hz
Built-in Functions Control loops, curves, time control, and alarm handling
Engineering Tool TAC Menta and associated Xenta toolset
Lifecycle Status Superseded by SpaceLogic and EcoStruxure Building Operation
Mounting Panel or DIN rail mounting inside control enclosure
Typical Application Air handling units, fan coil groups, and zone plant
Compliance CE marking; RoHS and REACH declarations held by Schneider Electric
System Integration
Maintenance challenges typically involve access rather than capability, as the engineering toolset predates current maintenance staff experience. The application file stored on the device often serves as the only complete documentation of intended plant behavior.
Critical Maintenance Note: Extract and store programs from all controllers while operational. A failed device without backup transforms replacement into a complex investigation.
On LonWorks networks, controller binding and network variable exchange configurations are partially held in the network setup. Proper documentation of both network bindings and control logic is essential. Re-commissioned devices without correct bindings will execute their sequences but fail to communicate.
During site migration, these controllers can often be retained as local control layers while supervisory systems are replaced, distributing costs and risks effectively.
Application Scenarios
  • Air Handling Units: Mid-sized commercial buildings requiring custom sequences beyond configurable device capabilities
  • Complex Zone Control: Zones with independent heating and cooling where plant complexity exceeds terminal unit capacity
  • Fan Coil Groups: Hotels and offices managing terminal units as coordinated groups
  • Legacy Infrastructure: Schools, clinics, and municipal buildings requiring replacement parts for long-lived control systems
  • Specialist Facilities: Laboratories and specialized environments requiring bespoke control sequences
  • Independent Operation: Installations where plant items must continue operating and recording independently of central systems
Product Details
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Schneider TAC Xenta 281 HVAC controller

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LonWorks programmable DDC controller

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LonTalk HVAC zone control unit

Compatibility: Works With Various Smart Home Systems
Installation Method: Standard 35mm DIN Rail Mounting
Outputtypes: Digital Outputs, Analog Outputs
Product Type: Hybrid Switch Actuator
Inputtype: Binary Switch Input
Securityfeatures: Password Protection, Data Encryption

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