KL5151-0021 | Beckhoff Bus Terminal Incremental Encoder Interface 24 V DC 32-Bit Counter

Beckhoff · Motors & Motion

Description  The Beckhoff KL5151-0021 is a 1-channel incremental encoder interface Bus Terminal designed for high-precision motion feedback in automation systems. Operating at 24 V DC, it supports quadrature decoding with 32-bit resolution and input frequencies up to 100 kHz, providing accurate position and speed measurement for industrial encoders.     Technical Specifications  Condition New/Never Used Surplus Brand Beckhoff Category Industrial Automation Part Number KL5151-0021 Subcategory Bus Terminal Function 1-channel incremental encoder interface Technology Incremental encoder interface, EN 61131-2 type 1 Number of Channels 1 Encoder Connection A, B, C, gate/latch, 24 V Sensor Inputs 1 Encoder Operating Voltage 24 V DC Counter 32-bit binary counter Limit Frequency 400,000 increments/s (with 4-fold evaluation) Quadrature Decoder 4-fold evaluation Zero-Pulse Latch 32-bit Supported Commands Read, set, enable Signal Levels “0”: < 5 V DC, “1”: > 15 V DC (typ. 5 mA) Power Supply 24 V DC (-15%/+20%) Current Consumption (K-bus) Typ. 40 mA Bit Width in Process Image 2 × 32-bit data, 2 × 8-bit control/status Electrical Isolation 500 V (K-bus/signal voltage) Protection Class IP20 Weight Approx. 50 g Operating Temperature -25°C to +60°C Storage Temperature -40°C to +85°C Relative Humidity 95%, non-condensing   Information About KL5151-0021 The Beckhoff KL5151-0021 Bus Terminal provides a high-performance interface for incremental encoders in automation and motion control systems. It captures encoder signals such as A, B, and C phases as well as gate and latch inputs, converting them into digital position and speed data through a 32-bit counter. The terminal supports quadrature decoding with 4-fold evaluation, allowing it to detect both rotation direction and fine position changes with high accuracy. Operating on a 24 V DC supply, it handles input frequencies up to 100 kHz (400,000 increments/s), making it suitable for fast-moving applications. The terminal integrates seamlessly into Beckhoff’s modular I/O system via the K-bus, providing reliable communication and synchronization with PLCs. Its compact design, robust electrical isolation, and flexible command functions enable precise motion tracking and control across diverse automation environments. Key Features: Incremental Encoder Interface: Supports one encoder channel with A, B, and C signals, suitable for industrial motion feedback. High-Resolution Counting: 32-bit counter ensures fine-grained measurement for precise position detection. Fast Signal Processing: Handles up to 400,000 increments per second with 4-fold quadrature decoding for accurate speed and direction sensing. Configurable Operation: Offers read, set, and enable commands for flexible control and parameterization via the automation controller. Zero-Pulse Latching: Captures reference positions reliably using a 32-bit zero-pulse latch function. Robust Signal Handling: Compatible with 24 V HTL signals per EN 61131-2 Type 1 specification, ensuring noise immunity. Electrical Isolation: 500 V separation between K-bus and signal voltage protects the control system from field disturbances. Compact Modular Integration: Designed for K-bus systems, simplifying installation and scalability within automation architectures. Reliable Performance: Operates across a wide temperature range from -25°C to +60°C for demanding industrial environments. Low Power Consumption: Efficient design draws only 40 mA from the K-bus, reducing system load. The KL5151-0021 delivers the reliability and precision required for position sensing, speed measurement, and feedback integration in industrial motion control applications.

Brand: Beckhoff · Category: Motors & Motion

Key features

• Incremental Encoder Interface: Supports one encoder channel with A, B, and C signals, suitable for industrial motion feedback.
• High-Resolution Counting: 32-bit counter ensures fine-grained measurement for precise position detection.
• Fast Signal Processing: Handles up to 400,000 increments per second with 4-fold quadrature decoding for accurate speed and direction sensing.
• Configurable Operation: Offers read, set, and enable commands for flexible control and parameterization via the automation controller.
• Zero-Pulse Latching: Captures reference positions reliably using a 32-bit zero-pulse latch function.
• Robust Signal Handling: Compatible with 24 V HTL signals per EN 61131-2 Type 1 specification, ensuring noise immunity.
• Electrical Isolation: 500 V separation between K-bus and signal voltage protects the control system from field disturbances.
• Compact Modular Integration: Designed for K-bus systems, simplifying installation and scalability within automation architectures.
• Reliable Performance: Operates across a wide temperature range from -25°C to +60°C for demanding industrial environments.
• Low Power Consumption: Efficient design draws only 40 mA from the K-bus, reducing system load.

Specifications

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