Description

The BECKHOFF KL2701 is a single-channel solid-state switch terminal designed for switching AC and DC voltages up to 230 V. As part of the modular Beckhoff Bus Terminal system, the KL2701 functions as a semiconductor relay with a single make-contact configuration. It integrates into K-bus communication systems, providing an electronic switching option for high-duty-cycle industrial automation environments.

Engineered to handle up to 3 A of steady load current, the terminal includes integrated surge voltage protection to defend against electrical transients. Because it utilizes solid-state switching technology rather than mechanical relay contacts, the KL2701 offers wear-free, bounce-free, and quiet switching operation with typical switch-off times of 2 to 4 milliseconds, making it suitable for high-frequency switching operations and systems requiring extended mechanical lifetimes.

Features

• Single-channel electronic switch with a make-contact configuration.
• Broad output switching range supporting 0 to 230 V AC or DC.
• Flexible connection support accommodating 2-wire, 3-wire, or 4-wire connection technology.
• High current carrying capacity with a 3 A continuous steady load limit.
• Transient protection with integrated surge voltage protection beginning from 400 V AC.
• Capable of handling transient inrush currents up to 5 A for 20 seconds and 50 A for 100 milliseconds.
• Low K-bus current consumption of typically 65 mA.
• Electronic, wear-free switching for silent and high-frequency applications.

Applications

• Control of AC and DC load elements, including solenoid valves, actuators, contactors, and small motors.
• High-duty-cycle switching applications where mechanical contact degradation limits system longevity.
• Noise-sensitive environments requiring silent electrical switching.
• Integration with K-bus controllers and decentralized I/O systems.

Technical Specifications

Electrical and Switching Data

Communication and Environment

Installation Guidelines

1. Ensure that all field power supplies and K-bus systems are completely de-energized before mounting or servicing the terminal.
2. Snap the KL2701 terminal securely onto a standard 35 mm DIN rail (EN 60715) until the lock is fully engaged and positive contact with neighboring terminals is made.
3. Ensure proper K-bus contact connection by aligning the terminal side-by-side with other Bus Terminals.
4. Connect field wires according to the specified 2-wire, 3-wire, or 4-wire arrangement. Ensure conductor insulation strip lengths match terminal block standards.
5. Install an external, fast-acting fuse rated at or below 10 A in the load circuit to safeguard the semiconductor switch from short circuits or extreme overload conditions.
6. Restore system power and check the operational status through the control processor's process image.

Replacement Recommendations

1. Power down the master K-bus system and isolate all load power supplies before starting the replacement.
2. Carefully record or label the wiring paths of all connected field conductors to ensure correct pin matching on the replacement terminal.
3. Release each wire by pressing the integrated tension clamp levers, and slide the wires out.
4. Pull the terminal release tab to disengage the KL2701 from the DIN rail and pull it straight out from the module assembly.
5. Mount the new KL2701, reconnect the wiring according to the labeled paths, and re-energize the assembly. No software address configuration is necessary.