Beckhoff EL2808 | EtherCAT 8-Channel Digital Output Terminal 24V 0.5A
Introduction:
Beckhoff EL2808 EtherCAT 8-channel digital output terminal. 24V DC at 0.5A per channel. Short-circuit proof with reverse polarity protection.
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Product Overview
The Beckhoff EL2808 is an EtherCAT digital output terminal with eight channels. This terminal connects binary 24V DC control signals to actuators at the process level. Each channel provides 0.5A of output current with short-circuit protection. The Beckhoff EL2808 features tool-free connection using direct plug-in technology. Users trust this terminal for high-density digital output applications in EtherCAT systems.
Technical Specifications
The EL2808 delivers reliable digital output performance with comprehensive protection features. Below are the complete technical details.
General Specifications
Product Type: EtherCAT Terminal, 8-channel digital output, 24V DC, 0.5A, 2-wire connection.
Product Status: Regular delivery from Beckhoff.
Connection Technology: 2-wire connection.
Number of Outputs: 8 channels.
Weight: Approx. 65 g for lightweight installation.
Configuration: No address or configuration setting required.
Voltage and Current Specifications
Nominal Voltage: 24V DC (-15% / +20%).
Maximum Output Current: 0.5 A (short-circuit proof) per channel.
Short-Circuit Current (Typical): Less than 2 A.
Total Current Load: Load dependent on number of active channels.
Current Consumption (Power Contacts): Typical 15 mA + load.
Reverse Voltage Protection: Yes for safe installation.
Load and Switching Specifications
Load Types Supported: Ohmic, inductive, lamp load.
Breaking Energy: Less than 150 mJ per channel.
Switching Time TON (Typical): 60 µs.
Switching Time TOFF (Typical): 300 µs.
Distributed Clocks: Not available on this model.
Power and Isolation Specifications
Current Consumption (E-bus): Typical 110 mA.
Electrical Isolation: 500 V (E-bus to field potential).
Power Contact Supply: Outputs supplied via 24V DC power contact.
Power Contacts: Connected through for daisy-chaining.
Bit Width and Process Image
Bit Width in Process Image: 8 outputs.
Signal Indication: LED for each channel state.
Physical Dimensions
Design Form: HD (High Density) housing with signal LEDs.
Housing Material: Polycarbonate for durability.
Width (W): 12 mm for high-density mounting.
Height (H): 100 mm.
Depth (D): 68 mm.
Packing Density: Increased with 16 connection points in 12 mm housing.
Wiring Specifications
Solid Conductors (s): Direct plug-in technique (tool-free).
Fine-Stranded Conductors (st): Spring actuation by screwdriver.
Ferrules (f): Spring actuation by screwdriver.
Connection Cross-Section (Solid): 0.08 to 1.5 mm².
Connection Cross-Section (Stranded): 0.25 to 1.5 mm².
Connection Cross-Section (With Ferrule): 0.14 to 0.75 mm².
AWG (Solid): 28 to 16.
AWG (Stranded): 22 to 16.
AWG (With Ferrule): 26 to 19.
Stripping Length: 8 to 9 mm.
Current Load Power Contacts (Imax): 10 A.
Environmental Specifications
Operating Temperature: -25 to +60 °C.
Storage Temperature: -40 to +85 °C.
Relative Humidity: 95% (no condensation).
Vibration Resistance: Conforms to EN 60068-2-6.
Shock Resistance: Conforms to EN 60068-2-27.
EMC Immunity: Conforms to EN 61000-6-2.
EMC Emission: Conforms to EN 61000-6-4.
Protection Rating: IP20.
Installation Position: Any (variable).
Mounting and Housing
Mounting: On 35 mm DIN rail conforming to EN 60715 with lock.
Side-by-Side Mounting: By means of double slot and key connection.
Marking: Labeling of the BZxxx series.
LED Indicators: Signal LEDs for each of the 8 channels.
Approvals and Certifications
CE: Yes.
UL: Yes.
ATEX: Yes (II 3 G Ex ec IIC T4 Gc).
IECEx: Yes (Ex ec IIC T4 Gc).
Installation Guide
Follow these steps to install the Beckhoff EL2808 correctly.
Power Down the System: Turn off power to the EtherCAT coupler and network.
Mount DIN Rail: Ensure 35 mm DIN rail conforming to EN 60715 is installed.
Connect Terminal Block: Attach the EL2808 to the right of the EtherCAT coupler or adjacent terminal.
Lock the Terminal: Engage the lock on the DIN rail.
Connect 24V Power: Ensure the power contact supplies 24V DC to the terminal.
Strip Wires: Remove 8 to 9 mm of insulation from each conductor.
Insert Solid Wires: Push directly into the spring-loaded terminal (tool-free).
Use Screwdriver for Stranded: Actuate the spring with a screwdriver for stranded wires.
Connect Actuators: Wire loads to the output channels (2-wire connection).
Verify Load Type: Ohmic, inductive, or lamp loads are all supported.
Check Current per Channel: Do not exceed 0.5 A per output.
Connect E-bus: Automatic through side-by-side mounting.
Apply Power: Turn on the EtherCAT coupler power supply.
Verify Output States: Check LED indicators for each channel.
Test Switching: Measure TON (60 µs typical) and TOFF (300 µs typical).
Installation Notes
The terminal draws 110 mA typical from the E-bus.
Power contacts are connected through for daisy-chaining power.
Each output is short-circuit proof with reverse voltage protection.
Breaking energy is limited to less than 150 mJ per channel.
The 2-wire connection simplifies field wiring.
Packaging List
This unit ships as a new and original product.
Beckhoff EL2808 EtherCAT Digital Output Terminal (8-channel)
Product data sheet with pinout diagram
Quick start guide
Anti-static factory packaging bag
Frequently Asked Questions (FAQ)
1. How many digital outputs does the EL2808 provide?
The Beckhoff EL2808 provides 8 digital output channels. Each channel operates at 24V DC with a 2-wire connection.
2. What is the maximum output current per channel?
The EL2808 delivers 0.5 A per channel with short-circuit proof protection. The short-circuit current is typically less than 2 A.
3. What load types can the EL2808 drive?
The Beckhoff EL2808 supports ohmic, inductive, and lamp loads. This flexibility suits various actuator types.
4. What are the switching times of the EL2808?
The EL2808 has typical switching times of 60 µs for TON and 300 µs for TOFF. This enables fast digital output control.
5. Does the EL2808 have reverse polarity protection?
Yes, the Beckhoff EL2808 features reverse voltage protection. It also includes short-circuit proof outputs for reliable operation.