Beckhoff KS4011 Bus Terminal

Description

Precision control of current-loop signals is a key component of modern process automation and remote I/O architectures. The Beckhoff KS4011 is a single-channel, single-ended analog output terminal designed to generate output signals in the 0 to 20 mA range with a 12-bit resolution. As part of the modular KS series, this device features a pluggable wiring level, enabling fast replacement and tool-free maintenance while maintaining consistent connection density on the DIN rail. The unit facilitates galvanic isolation up to 500 V between the internal K-bus and the output signal line, protecting upstream control controllers from field disturbances.

Features

• Single-channel analog output with a standard 0 to 20 mA signal range.
• 12-bit resolution provides precise signal conversion (~1.5 ms conversion time).
• Pluggable connection level for simplified terminal replacement and reduced field wiring times.
• Electrical isolation of 500 V (K-bus to signal voltage) for superior system reliability.
• Compact 12 mm modular housing designed for side-by-side assembly via a double slot-and-key connection system.

Applications

• Process loop control (e.g., modulating valves, pneumatic actuators, and positioners).
• Variable frequency drive speed referencing via current-loop inputs.
• Remote industrial automation configurations within oil and gas, chemical processing, and water treatment systems.
• ATEX Zone 2 hazardous location field installations.

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mount vertically or horizontally on standard 35 mm DIN rails complying with EN 60715. Ensure the interlocking mechanism is locked to prevent loose connections on the backplane.
• Ensure all spring terminals are wired using conductors stripped to the recommended length (9 to 10 mm) to prevent exposure or poor electrical contact.
• Before detaching the pluggable KS connection level, disconnect the power supply to prevent damage to the K-bus backplane logic.
• Provide sufficient ventilation around the terminal cluster to maintain ambient operating temperatures within the 0 to +55 degC limits.

Compliance and Certifications

• CE
• UL
• ATEX (II 3 G Ex nA IIC T4 Gc)
• DNVGL