Beckhoff EL1004 EtherCAT Terminal

The Beckhoff EL1004 is a 4-channel digital input EtherCAT Terminal designed to acquire 24 V binary signals from the process level and transmit them in electrically isolated form to a higher-level controller. With a 3 ms input filter and compliance with EN 61131-2 Type 1/3 input specs, it ensures stable, bounce-free switching — ideal for directly connecting up to four 2-wire sensors via integrated +24 V connections.

Perfect for decentralized automation systems demanding fast, reliable digital input processing.

Technical Specifications

Manufacturer: Beckhoff
Part Number: EL1004 Beckhoff
Product Type: Digital Input Terminal
Number of Inputs: 4
Connection Type: 2-wire
Input Specification: EN 61131-2 Type 1/3
Nominal Voltage: 24 V DC (-15%/+20%)
“0” Signal Voltage: -3…+5 V
“1” Signal Voltage: 11…30 V
Input Current: Typ. 3 mA
Input Filter Time: Typ. 3.0 ms
Electrical Isolation: 500 V (E-bus / field potential)
Bit Width in Process Image: 4 inputs
Special Features: Direct sensor connection, bounce-free switching

Electrical & Power

Power Supply: Via power contacts
Current Consumption (E-bus): Typ. 90 mA
Current Consumption (Power Contacts): Typ. 2 mA + load
Distributed Clocks: Not supported
Maximum Load (Power Contacts): 10 A

Mechanical Specifications

Dimensions (W x H x D): 12 mm x 100 mm x 68 mm
Housing Type: EL-12-8pin / ES-12-8pin
Material: Polycarbonate
Installation: DIN rail mounting (EN 60715)
Wiring Method:
– Solid: 0.08…2.5 mm²
– Flexible: 0.08…2.5 mm²
– Ferrule: 0.14…1.5 mm²
AWG Range: AWG28…14 (solid/flexible), AWG26…16 (ferrule)
Stripping Length: 8…9 mm / 9…10 mm
Side-by-Side Mounting: Double slot and key connection

Environmental Conditions

Operating Temperature: -25°C to +60°C
Storage Temperature: -40°C to +85°C
Relative Humidity: 95% (non-condensing)
Vibration/Shock Resistance: EN 60068-2-6 / EN 60068-2-27
EMC Compliance: EN 61000-6-2 / EN 61000-6-4
IP Rating: IP20

Certifications & Compliance

Approvals: CE, CCC, UL, ATEX, IECEx, DNV GL, cFMus
ATEX Marking: II 3 G Ex ec IIC T4 Gc
IECEx Marking: Ex ec IIC T4 Gc
cFMus Marking:
– Class I, Division 2, Groups A, B, C, D
– Class I, Zone 2, AEx ec IIC T4 Gc

Key Features

✅ 4-Channel Digital Input: Acquires and isolates 24 V control signals.

✅ 3 ms Input Filter: Eliminates contact bounce from mechanical switches.

✅ Sensor Ready: Direct connection of 2-wire sensors with additional 24 V points.

✅ DIN Rail Mounting: Compact terminal ideal for modular systems.

✅ Status LEDs: Easy diagnostics with channel-wise indication.

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Ready for fast dispatch and perfect for integrating reliable digital inputs into your EtherCAT-based automation architecture.

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