Beckhoff EL5151-0021 EtherCAT Terminal 1-Channel Incremental Encoder Interface

SKU EL5151-0021

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12-month warranty
Free returns within 30 days

Manufacturer: BECKHOFF
Product No.: EL5151-0021
Origin Germany
Product Type: EtherCAT Terminals
Payment: T/T, Western Union
Weight: 0.05 kg
Dimensions: 12 mm x 100 mm x 68 mm
Shipping port: Xiamen
Warranty: 12 months

Product Description

Description

Processing 24 V HTL encoder signals with absolute precision, the Beckhoff EL5151-0021 serves as a high-performance incremental encoder interface within the modular EtherCAT Terminal system. This single-channel EtherCAT Terminal is specifically engineered to interface directly with incremental encoders, enabling accurate position and velocity tracking in dynamic industrial automation systems. By utilizing phase-shifted signals, the module handles complex motion profiles with ease.

The unit features integrated latch and gate inputs for rapid registration of encoder values based on external hardware events. Additionally, a dedicated 24 V DC digital output is available, permitting onboard hardware-level comparison and workpiece measurement functions. Its robust design, status LEDs, and compact form factor make it an essential component for high-reliability machine controls requiring rapid I/O processing.

Features

Single-channel interface optimized for 24 V DC HTL incremental encoders
Supports 4-fold quadrature decoder evaluation for maximum positioning resolution
Integrated 24 V DC latch input for high-speed hardware-triggered position capture
One parameterizable 24 V DC digital output (0.5 A) with high-speed compare functionality
Compact 12 mm DIN rail housing with integrated signal diagnostics and LED status indicators
Simple, tool-free wiring using spring-actuated cage-clamp connection technology
Direct integration into TwinCAT and compatibility with standardized EtherCAT networks

Applications

Precision positioning and speed measurement in material handling systems
Dynamic workpiece and product length measurement in packaging machines
Closed-loop velocity feedback for specialized assembly and conveyor lines
Interfacing rotary encoders with motion controllers in manufacturing processes

Technical Specifications

Manufacturer	Beckhoff
Part Number	EL5151-0021
Product Type	EtherCAT Terminal
Number of Channels	1
Technology	Incremental encoder interface (HTL, 24 V DC)
Encoder Connection	1 x A, B, C (24 V DC, single-ended, EN 61131-2, Type 1)
Input Voltage Levels	"0": less than 5 V DC, "1": greater than 15 V DC (typ. 5 mA)
Additional Inputs	1 x Latch input (24 V DC)
Additional Outputs	1 x Digital output (24 V DC, 0.5 A)
Encoder Operating Voltage	24 V DC (-15% / +20%, generated from the 24 V DC power contacts)
Counter Range	1 x 32 bit
Limit Frequency	400,000 increments/s (with 4-fold evaluation), equivalent to 100 kHz
Quadrature Decoder	4-fold evaluation
Nominal Voltage	24 V DC (-15% / +20%)
Current Consumption (Power Contacts)	typ. 100 mA + load
Max. Current Load Power Contacts	10 A
Special Features	Latch function, parameterizable output 24 V DC (compare function), workpiece measurement
Operating Temperature	0 to +55 degC
Storage Temperature	-25 to +85 degC
Relative Humidity	95%, no condensation
Vibration and Shock Resistance	Conforms to EN 60068-2-6 / EN 60068-2-27
EMC Immunity and Emission	Conforms to EN 61000-6-2 / EN 61000-6-4
Protection Rating	IP20
Housing Material	Polycarbonate
Installation	35 mm DIN rail (EN 60715) with locking tab
Side-by-Side Mounting	Double slot and key connection
Wiring Connection	Spring actuation by screwdriver
Solid/Stranded Wire Connection Cross-Section	0.08 to 2.5 mm² (AWG 28...14)
Ferrule Wire Connection Cross-Section	0.14 to 1.5 mm² (AWG 26...16)
Stripping Length	8 to 9 mm
Dimensions (W x H x D)	12 mm x 100 mm x 68 mm
Weight	approx. 50 g

Installation Guidelines

Mount the module vertically on a standard 35 mm DIN rail conforming to EN 60715. Ensure the locking tab engages securely.
Ensure that power contacts are clean and correctly aligned prior to joining adjacent terminals.
Strip wiring to the specified length of 8 to 9 mm to prevent exposed conductors or loose connections inside the spring clamp.
Ensure operating environment conforms to IP20 rating; protect from conductive dust, moisture, and corrosive atmospheric gases.

Compliance and Certifications

Shipping & Returns

Global Express Shipping

Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

FAQ

What is the primary encoder signal interface of the EL5151-0021?

The Beckhoff EL5151-0021 interfaces with single-ended 24 V DC HTL (High Threshold Logic) incremental encoders using A, B, and C signal channels.

What is the maximum limit frequency supported by the module?

The terminal supports a limit frequency of 100 kHz, which corresponds to 400,000 increments per second with 4-fold quadrature evaluation.

Does the EL5151-0021 feature an integrated output?

Yes, it includes one parameterizable 24 V DC digital output with a maximum load of 0.5 A, useful for hardware-level compare and workpiece measurement operations.

What are the recommended wiring parameters for this terminal?

The spring-actuated terminal block supports solid and stranded wires from 0.08 to 2.5 mm² (AWG 28...14) and ferrules from 0.14 to 1.5 mm² (AWG 26...16), with a stripping length of 8 to 9 mm.

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