BECKHOFF KL4012 Bus Terminal

Description

The BECKHOFF KL4012 is a 2-channel analog output Bus Terminal designed for precise current-loop control within industrial automation systems. Operating on the K-bus system, this terminal generates analog signals in the range of 0 to 20 mA with a resolution of 12 bits, making it suitable for driving actuators, process controllers, and variable speed drives requiring current inputs.

Each channel of the BECKHOFF KL4012 is electrically isolated from the K-bus up to 500 V, protecting control-level components from field-side electrical noise and potential differences. The terminal field-side electronics are supplied via the 24 V DC power contacts, ensuring electrical separation and simple system design.

Features

• Two single-ended analog output channels.
• Analog output current range of 0 to 20 mA.
• 12-bit resolution for precise analog control.
• Electrical isolation of 500 V between the K-bus and the signal lines.
• Support for optional control and status bytes via the process image.
• Direct integration with standard K-bus couplers and controllers.

Applications

• Analog control of valves, positioning units, and actuators.
• Integration with variable frequency drives (VFD) via current reference inputs.
• Process loop integration and transmitter reference signaling.
• General industrial automation and machine control architectures using current-driven loops.

Technical Specifications

General and Signal Specifications

Electrical Specifications

Mechanical and Environmental

Connections / Interfaces

Installation Guidelines

1. Ensure the entire industrial control system and power supply are fully de-energized before beginning installation, modification, or maintenance tasks.
2. Mount the BECKHOFF KL4012 Bus Terminal onto a standard 35 mm DIN rail (EN 60715) by sliding it into place until the locking mechanism engages securely.
3. Verify alignment with adjacent bus terminals to ensure proper mechanical connection and contact integrity of the internal K-bus and power contacts.
4. Connect signal lines to the designated terminal points according to the connections table using appropriate conductor sizes.
5. Upon physical integration, configure the terminal using TwinCAT or compatible controller environment ensuring the process image matches the terminal parameters.