Siemens DDC PXX485.3 Expansion Module

The Siemens PXX485.3 Expansion Module is a critical hardware component for scaling APOGEE building automation systems. Engineered for seamless integration with PXC Modular controller panels (PXC00-E96.A, PXC100-E96.A, and PXC100-PE96.A), this module expands your supervisory control capabilities by providing three dedicated RS-485 interfaces. Whether managing P1 Field Level Networks (FLNs) or a single BACnet MS/TP FLN, the PXX-485.3 allows for high-density device management, supporting up to 96 field devices across its serial ports. This hardware utilizes a self-forming bus for rapid DIN-rail mounting, ensuring stable communication between DDC supervisory field panels and terminal unit controllers. For contractors managing complex commercial HVAC controls, it offers a reliable method to bridge automation level networks (ALN) with extensive field-level peripheral devices without the need for additional higher-level processors. This module ensures robust data transmission rates ranging from 4800 bps to 38.4 Kbps, optimizing Direct Digital Control reliability across large-scale facility infrastructures.

• Scalable Integration: Adds three RS-485 ports to PXC Modular series panels to support complex field level networks.
• High Device Capacity: Capable of managing up to 96 FLN devices, maximizing the utility of a single modular hub.
• Universal Protocol Support: Supports both Siemens P1 and BACnet MS/TP communication protocols for flexible site deployments.
• Durable DIN-Rail Construction: Features a rugged, compact design that snaps directly into existing Siemens APOGEE hardware stacks.
• Advanced Data Stability: Enhances DDC performance by isolating segments and preventing packet collisions across long-run serial trunks.

Is the PXX485.3 compatible with BACnet and P1?
Yes, this module facilitates communication for both P1 Field Level Networks and BACnet MS/TP networks, depending on the controller's firmware and configuration.

How many devices can I connect to a single expansion module?
Each Siemens PXX485.3 supports a maximum of 96 devices total across the three RS-485 ports integrated into your PXC setup.

What controllers accept the PXX-485.3?
It is specifically designed for the PXC Modular series, including the PXC00-E, PXC100-E, and PXC100-PE models, connecting via the self-forming bus to the left of the controller.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.