B&R 7EX470.50-1 B&R 2003 CAN Bus Controller

Product Overview

The 7EX470.50-1 (7EX470.50-1) is a network-capable CAN bus controller module engineered for the B&R 2003 series industrial control architecture. This module serves as a critical communication bridge, facilitating reliable data exchange between distributed I/O systems and the main controller via two electrically isolated CAN interfaces. Its design prioritizes operational continuity in high-noise environments, such as large-scale material handling systems, automated logistics, and multi-axis motion control applications, where robust network communication is vital to preventing system-wide downtime.

Technical Configuration

The 7EX470.50-1 is built for high-performance network integration, featuring dual CAN interfaces that are electrically isolated to prevent ground-loop interference. The module allows for precise configuration of network parameters, including node identification and baud rate, via an integrated number switch located on the front panel.

In terms of power management, the module operates on a standard 24 VDC supply (with an operational range of 18 VDC to 30 VDC). Beyond its own power consumption (max. 20 W), it acts as a power distribution node, providing 14.5 W of output power to support connected I/O and screw-in modules. This integrated power delivery simplifies cabinet wiring and ensures that peripheral modules remain powered consistently within the 2003 rack system.

Technical Specifications

FAQs

What is the purpose of the number switch on the module?

The number switch is a physical interface used to manually set the CAN node address and the network baud rate, ensuring the controller is correctly recognized by the master system during commissioning.

How does electrical isolation benefit the CAN bus network?

Electrical isolation protects the module's communication transceivers from voltage spikes and ground potential differences between different nodes on the network, which significantly increases network reliability and prevents port damage.

Can I daisy-chain power through this module?

The 7EX470.50-1 provides 14.5 W of output power to adjacent I/O modules within the same rack. Ensure that the total power demand of your connected modules does not exceed this rating.

What happens if the input voltage drops below 18 VDC?

The module is specified to operate between 18 and 30 VDC. Operating below this threshold may lead to unstable communication, loss of network synchronization, or potential module reset.

Installation and Network Best Practices

• CAN Termination: Ensure that both physical ends of the CAN bus network are terminated with a 120-ohm resistor. Failing to terminate the bus correctly often leads to signal reflections, which manifest as intermittent communication errors or "bus off" states.
• Cable Selection: Use high-quality, shielded twisted-pair cables specifically designed for CAN bus applications. Avoid running communication cables in parallel with high-voltage lines or motor drive power cables to mitigate electromagnetic interference.
• Grounding Protocol: Maintain a consistent grounding scheme across the entire network. While the module's interfaces are isolated, the cable shield should be tied to a clean functional earth at one central point to ensure effective noise dissipation.
• Baud Rate Matching: All nodes on the CAN network must be configured to the same baud rate. Use the integrated number switches carefully; a baud rate mismatch will prevent the module from entering the network and may cause error frames on the bus.