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.
