Siemens PXC22.1-E.D Building DDC Controller

Description

Siemens PXC22.1-E.D Building DDC Controller

Product Dimensions：

The Siemens PXC22.1-E.D is a highly versatile, modular automation station belonging to the Desigo CC / Desigo Room Automation (DRA) family. It is a programmable BACnet controller designed for the control and monitoring of heating, ventilation, air conditioning (HVAC), and other building service plants.

Product Detailed Description

The PXC22.1-E.D acts as the “brain” for medium-to-large localized building automation systems. The “-E” designation indicates that it features integrated Ethernet communication supporting BACnet/IP, allowing it to seamlessly integrate into IT networks. The “.D” suffix denotes that the controller is equipped with a built-in operator display and buttons, allowing maintenance personnel to view system statuses, alarms, and override points directly at the control panel without needing a laptop.

Technical Parameters

Product Advantages

• Native BACnet/IP Communication: Connects directly to standard Ethernet networks, providing high-speed data transmission and easy integration into top-tier SCADA or Building Management Systems (BMS).
• Local User Interface (.D): The integrated display significantly simplifies commissioning and troubleshooting, allowing on-site technicians to check temperature readings, valve positions, and fault codes instantly.
• Freely Programmable: Utilizes Siemens’ powerful TX-I/O or Desigo tools (like PX-Design), allowing custom control strategies, schedules, and trend logs to be tailored to specific building requirements.
• Extensibility: While it features 22 onboard I/O channels, it can be expanded further using TX-I/O modules to accommodate growing field devices.
• Robust Fail-Safe Features: Includes battery-free backup of application data and historical data retention during power outages.

Important Considerations & Precautions

• Power Supply Quality: Always use a dedicated, isolated 24 V AC transformer. Sharing the transformer with heavy inductive loads (like large contactors or actuators) can introduce electrical noise and cause controller instability.
• Network Security: Because it sits on an Ethernet network (BACnet/IP), it should be installed behind an industrial firewall or on a dedicated Building Automation VLAN to prevent unauthorized access.
• Signal Separation: Keep high-voltage AC wiring (e.g., relay output lines driving pumps) physically separated from low-voltage DC sensor lines (e.g., 0–10V or PT1000 inputs) to avoid electromagnetic interference.
• Firmware Lifecycle: Ensure the firmware matches the version of the Desigo CC or Desigo Insight system architecture running in the building for seamless database synchronization.

Product Applications

The PXC22.1-E.D is widely used in commercial, institutional, and industrial building automation:

• Air Handling Units (AHUs): Managing fan speeds, heating/cooling coils, dampener positions, and humidity control loops.
• Chiller & Boiler Plant Control: Coordinating staging sequences, secondary pump speeds, and supply/return water temperature optimization.
• District Heating/Cooling Substations: Monitoring energy meters and regulating heat exchangers.
• Cleanroom & Laboratory Control: Managing precise pressure cascades and room air-change rates.

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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