Description
Siemens PXA40-T Expansion Module
Product Dimensions:
The Siemens PXA40-T is a high-performance expansion module within the Desigo PX building automation system. It serves primarily as a system controller and communication interface, often used to integrate decentralized building services and provide a connection point for operator units.
1. Product Description
The PXA40-T belongs to the Desigo PX automation station range. It is designed to handle complex control logic and system-wide functions. Its primary role is to act as a bridge and processor for building management data, ensuring seamless communication between field devices and the management station.
2. Technical Specifications (Product Parameters)
| Parameter | Specification |
| Operating Voltage | AC 24 V ± 20% |
| Frequency | 50/60 Hz |
| Power Consumption | Max. 5 VA |
| Communication | BACnet/IP or BACnet/LonTalk (model dependent) |
| Processor | High-performance 32-bit RISC processor |
| Memory | High-capacity Flash ROM and SDRAM |
| Mounting | Standard DIN Rail (35mm) |
| Protection Class | IP20 (according to EN 60529) |
| Ambient Temperature | 0…50 °C (Operation) |
3. Key Product Advantages
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Scalability: Seamlessly integrates with various Desigo PX modules, allowing for easy expansion as building requirements grow.
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Reliability: Built with industrial-grade components to ensure long-term stability in demanding HVAC environments.
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Open Communication: Fully compliant with BACnet protocols, ensuring interoperability with third-party devices and systems.
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Efficient Engineering: Uses the standard Desigo toolset (Xworks Plus), reducing commissioning time and engineering errors.
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Real-time Processing: Capable of handling complex control loops and data logging without latency.
4. Product Applications
The PXA40-T is typically utilized in medium to large-scale commercial buildings, including:
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HVAC Control: Management of air handling units (AHUs), boilers, and chillers.
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System Integration: Acting as a gateway between different communication protocols.
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Energy Management: Collecting and processing data for energy optimization and reporting.
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Remote Monitoring: Providing a stable platform for web-based building operation and remote diagnostics.
5. Important Considerations (Precautions)
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Installation: Must be installed in a protective cabinet (panel) to avoid dust and moisture.
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Wiring: Ensure the 24V supply is stable; incorrect polarity or voltage spikes can damage the internal circuitry.
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Firmware: Always ensure the module is running the firmware version compatible with your specific Desigo CC or Xworks software.
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Environment: Avoid installation in areas with high electromagnetic interference (EMI) or extreme vibration.
6. Summary Table
| Feature | Detail |
| System Compatibility | Siemens Desigo PX |
| Protocol | BACnet (B-BC profile) |
| Usage | Control and System Integration |
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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