B&R X20IF1072 X20 CAN Bus Interface Module

Product Overview

The X20IF1072 (X20IF1072) is a dedicated CAN bus interface module designed for the B&R X20 system, enabling high-speed deterministic communication with a wide array of industrial field devices. Equipped with the industry-standard SJA 1000 controller, this module allows X20 PLCs to interface seamlessly with CAN-based sensors, actuators, and motor drives. It is particularly effective in mobile automation, specialized vehicle control, and distributed industrial networks where robust, long-distance communication is required. The X20IF1072 ensures high data integrity across distances up to $1000$ m, making it a critical component for large-scale assembly lines and process automation skids.

Technical Configuration

The module architecture is optimized for high-speed serial data exchange and physical layer reliability.

• SJA 1000 Controller: Utilizes a high-performance standalone CAN controller to manage bus arbitration and error handling, offloading these tasks from the system CPU.

• Integrated Termination: Features a built-in terminating resistor that can be activated to ensure proper signal impedance, eliminating the need for external resistor blocks at the end of the bus line.

• Physical Interface: Utilizes a 5-pin male multipoint connector for secure and standardized wiring of the CAN High, CAN Low, and Ground lines.

• Diagnostic Visibility: Includes status LEDs for real-time monitoring of the module health, active data transfer, and the state of the internal terminating resistor.

Technical Specifications

FAQs

What is the maximum speed I can achieve with the X20IF1072?

The module supports transfer rates up to $1$ Mbit/s. However, the maximum speed is inversely proportional to the cable length; for example, $1$ Mbit/s is typically limited to $40$ meters, while longer distances like $1000$ meters require lower baud rates (e.g., $50$ kbit/s).

How do I enable the integrated terminating resistor?

The terminating resistor is integrated within the module hardware and can be monitored via the status LED. Configuration is typically handled through the B&R Automation Studio software environment during the hardware setup phase.

Can this module be used for CANopen communication?

Yes, since CANopen is a high-level protocol based on the CAN physical layer, the X20IF1072 hardware can support CANopen master or slave configurations when paired with the appropriate B&R software libraries.

Engineering Installation and CAN Network Guidelines

• Bus Topology and Termination: A CAN network must be terminated with $120$ $\Omega$ at both physical ends of the bus. If the X20IF1072 is the first or last node in the network, ensure the internal termination is active. Failure to terminate correctly will result in signal reflections and communication "Bus Off" errors.

• Wiring and Shielding: Use high-quality shielded twisted-pair cable specifically rated for CAN bus (characteristic impedance of $120$ $\Omega$). The shield should be connected to the functional ground at a single point to prevent ground loops while protecting the data lines from EMI.

• Ground Potential: Ensure that the ground potential between all CAN nodes is equalized. Significant potential differences between nodes can damage the SJA 1000 transceiver or cause intermittent data corruption.

• Baud Rate Configuration: All nodes on the CAN segment must be configured to the exact same baud rate and sample point. Use the "Module Status" and "Data Transfer" LEDs to verify that the module has successfully entered the "Pre-operational" or "Operational" state without error flags.