Description

The BECKHOFF BC9000 is an Ethernet TCP/IP Bus Terminal Controller designed to function as a compact PLC within the modular Beckhoff Bus Terminal system. Operating as a decentralized controller, it links fieldbus networks to terminal modules while executing localized control logic independent of a central master computer. The controller establishes a reliable bridge between Ethernet-based networks and local I/O points, optimizing system modularity and control architecture.

Equipped with an integrated PLC runtime system, the BECKHOFF BC9000 can process programs written in standard IEC 61131-3 languages. It directly controls up to 64 local Bus Terminals via the K-bus, making it a highly adaptable controller for decentralized automation nodes. Communication with higher-level systems is handled via a standard RJ45 interface, ensuring fast data exchange and configuration access.

Built into a compact housing optimized for DIN rail mounting, this controller features direct spring-actuation terminal connections for rapid and vibration-resistant wiring. Diagnostics are simplified through physical status LEDs that monitor bus communication, PLC execution, power status, and internal K-bus states.

Features

• Integrated PLC runtime system execution for independent local control tasks.
• Direct connection interface for up to 64 standard Beckhoff Bus Terminals.
• Dual-protocol support featuring TwinCAT ADS and Modbus TCP.
• Integrated 10/100 Mbit/s Ethernet interface with automatic transmission rate recognition.
• Direct configuration via the Beckhoff KS2000 software package or over the Ethernet connection.
• Comprehensive electrical isolation between fieldbus, power contacts, and internal supply electronics.
• Vibration and shock resistance compliant with industrial EN standards.

Applications

• Decentralized control nodes in manufacturing and factory automation systems.
• Distributed data acquisition and pre-processing stations in complex machinery.
• Modular building automation subsystems requiring Modbus TCP communications.
• Independent local control tasks requiring Ethernet network integration.

Technical Specifications

Connections / Interfaces

Installation Guidelines

1. Ensure all power sources to the cabinet, terminals, and controller are completely de-energized before mounting.
2. Inspect the controller housing and connection contacts for any physical damage prior to installation.
3. Mount the unit securely on a standard 35 mm DIN rail conforming to EN 60715, ensuring the latch mechanism clicks fully into place.
4. Align adjacent Bus Terminals side by side using the integrated double slot and key connection system to establish the internal K-bus link.
5. Verify that field wiring is stripped to the proper length of 8 to 9 mm. Actuate the terminal spring mechanism with a screwdriver to insert conductors.
6. Connect the 24 V DC power supply to the designated power terminals, observing polarity and verifying that maximum current limits for both K-bus and power contacts are not exceeded.
7. Connect the RJ45 Ethernet cable and check status LEDs on power-up to verify active connection, bus integrity, and controller state.

Replacement Recommendations

When replacing an existing controller, create a complete backup of the TwinCAT PLC project configuration and document any local IP address parameters. Power down the system, disconnect the Ethernet cable and all field wiring, and disengage the locking mechanism from the DIN rail. Set the identical network configurations on the replacement BECKHOFF BC9000 before restoring power and reloading the PLC project.