Beckhoff EL1918 EtherCAT Terminal

The Beckhoff EL1918 is a high-density EtherCAT Terminal designed for safety-critical applications requiring eight digital inputs with potential-free contacts at 24 V DC. Equipped with TwinSAFE and integrated TwinSAFE Logic, this terminal transmits signals using Safety over EtherCAT (FSoE) and offers both input functionality and onboard safety control.

Its flexible test pulse configuration, ability to support up to 128 safe connections, and compatibility with SIL 3 and PL e standards make the EL1918 ideal for scalable machine safety implementations. In systems that do not require integrated logic, the EL1918-2200 variant provides the same safe inputs without controller functionality.

Technical Specifications

Manufacturer: Beckhoff
Part Number: EL1918 Beckhoff
Product Type: EtherCAT Safety Input Terminal
Protocol: TwinSAFE / FSoE
Safety Standards: EN ISO 13849-1:2015 (Cat. 4, PL e), EN 61508:2010 (SIL 3)

Digital Inputs

Number of Safe Inputs: 8
Input Type: 1-/2-wire with potential-free contacts
Test Pulse Configuration: Individually configurable (fine granularity)
Logic Controller: Integrated TwinSAFE Logic (like EL6910)
Max. Safe Connections: 128
Fallback Option: Use EL1918-2200 for input-only functionality

Electrical & Power

Nominal Input Voltage: 24 V DC
Current Consumption (E-bus): Typ. 165 mA
Current Consumption (Power Contacts): See documentation
Max. Current Load (Power Contacts): 10 A
Fault Response Time: ≤ Watchdog time (parameterizable)

Mechanical & Installation

Housing Type: EL-12-16pin HD (High Density)
Design: Slimline with signal LEDs
Installation: 35 mm DIN rail (EN 60715)
Mounting Method: Side-by-side with double slot/key connection
Dimensions (W x H x D): 12 mm x 100 mm x 68 mm
Weight: Approx. 50 g

Wiring & Connections

Wiring Method:
– Solid (s): direct plug-in
– Fine-stranded (st) / Ferrule (f): spring actuation via screwdriver
Connection Cross-Section:
– s: 0.08…1.5 mm²
– st: 0.25…1.5 mm²
– f: 0.14…0.75 mm²
AWG Range:
– s: AWG28…16
– st: AWG22…16
– f: AWG26…19
Stripping Length: 8…9 mm

Environmental & Approvals

Protection Rating: IP20
Operating Temperature: -25°C to +60°C
Storage Temperature: -40°C to +85°C
Approvals: CE, UL
Explosion Protection:
– ATEX: II 3G Ex ec IIC T4 Gc / II 3D Ex tc IIIC T135 °C Dc
– IECEx: Ex ec IIC T4 Gc
– cFMus: Class I Div. 2 Groups A–D / Class I Zone 2 AEx ec IIC T4 Gc

Key Features

✅ 8 Safe Inputs: High-density configuration with individual test pulse setup.

✅ Integrated TwinSAFE Logic: Optional safety controller functionality onboard.

✅ Advanced FSoE Safety: Safety over EtherCAT with up to 128 safe connections.

✅ Hot-Swappable: Safety parameters downloaded from central logic unit.

✅ Ex Certified: ATEX, IECEx, and cFMus compliance.

✅ Compact Housing: Only 12 mm wide – ideal for space-constrained panels.

📦 Buy Beckhoff EL1918 EtherCAT Terminal – 8-Channel TwinSAFE Logic Digital Input (SIL 3, IP20)

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Ensure functional machine safety with integrated logic in a compact terminal. Fast delivery and full UK support available.

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