B&R X20CS1070 X20 Series CAN Bus Communication Module

Product Overview

The X20CS1070 (X20CS1070) is a high-performance communication electronics module within the B&R X20 System lineup, serving as a dedicated gateway for CAN bus integration. Engineered for deterministic data exchange in complex industrial networks, this module allows X20 PLC systems to interface seamlessly with CAN-based peripherals such as variable frequency drives (VFDs), specialized sensors, and third-party controllers. Supporting transfer rates up to 1 Mbit/s, the X20CS1070 is vital for high-speed motion control and real-time process monitoring. Its compact 12.5 mm design, combined with integrated diagnostic indicators and a software-switchable terminating resistor, ensures a streamlined installation process while maintaining the highest levels of network stability.

Network Architecture and Communication Logic

The X20CS1070 acts as a robust communication bridge, providing the physical and logical layer necessary for reliable CAN networking in harsh EMI environments.

• High-Speed Throughput: Supports standard CAN transmission rates from low-speed long-distance runs up to a maximum of 1 Mbit/s for local high-speed synchronization.

• Integrated Termination: Features an internal terminating resistor that can be activated via software, eliminating the need for external resistors at the end of the bus line.

• Extended Network Reach: Capable of managing network segments with a maximum distance of 1000 m (at reduced bitrates), making it suitable for large-scale factory floor deployments.

• Advanced Diagnostics: Four dedicated LEDs provide instant feedback on Data Transfer, Terminating Resistor status, Operating Status, and Module Status.

Technical Specifications

Technical FAQs

How do I activate the internal terminating resistor in the X20CS1070?

The terminating resistor is software-controlled within B&R Automation Studio. In the module's hardware configuration, you can toggle the resistor "ON" if the module is positioned at the physical end of the CAN network segment, ensuring signal integrity by preventing reflections.

What is the significance of the 0x1FD1 ID code?

The 0x1FD1 ID code is the unique electronic identifier for the X20CS1070. When the X20 system performs its power-on self-test (POST), the bus controller verifies this ID to ensure the physical hardware matches the software project configuration, preventing communication mismatches.

Can I use the X20CS1070 for CANopen applications?

Yes. While the module manages the physical and data link layers of the CAN bus, higher-level protocols like CANopen are handled via the B&R software libraries. The X20CS1070 provides the deterministic hardware foundation required for robust CANopen master or slave functionality.

Field Engineering & Installation Guide

• Wiring for Long Distances: For runs approaching the 1000 m limit, use high-quality twisted-pair cabling with a cross-section of at least 0.5 mm squared. Ensure the transfer rate is lowered in Automation Studio to match the physical cable length (e.g., 50 kbit/s for 1000 m).

• Terminal Block Connection: This electronics module requires a 12-pin X20TB12 terminal block. Ensure that the shield of the CAN cable is connected to the functional ground (FE) at the terminal block to divert high-frequency interference.

• Grounding Best Practices: To prevent ground loops across long CAN segments, ensure that the potential equalization between the different network nodes is addressed. The X20 system's internal bus isolation helps, but a common reference ground for the CAN transceiver is recommended.

Engineering Advantages

The X20CS1070 is designed for maximum uptime in mission-critical systems. The 4.0 kg shipping weight (reflecting the protective bulk packaging) underscores the industrial-grade nature of B&R's communication hardware. The module's ability to provide real-time status via LEDs—specifically the "Terminating Resistor" LED—allows for rapid visual audits of network topology without opening software diagnostics. Its wide operating temperature and IP20 protection ensure it thrives in the heat and vibration common to cabinet-mounted industrial automation.