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Title:

Beckhoff EL1904 EtherCAT Terminal – 4-Channel Digital Input, 24 V DC, TwinSAFE Safety Input Module

Product Description:

The Beckhoff EL1904 is a 4-channel digital input terminal designed for safety-critical applications. It supports 24 V DC potential-free contacts and communicates via Safety over EtherCAT (FSoE) with TwinSAFE logic controllers. This module provides advanced safety features including cross-circuit detection, 1-channel or 2-channel evaluation, and integrated test pulse functionality per channel. The EL1904 meets the highest safety standards (PL e / SIL 3 / Cat. 4) and is ideal for use in emergency stop circuits, guard door monitoring, or other machine safety systems. Compact DIN rail mount form factor (IP20), operating temperature -25 to +60 °C.

Features:

4 safe digital inputs (24 V DC)

TwinSAFE certified (FSoE protocol)

1-/2-channel input evaluation

Cross-circuit detection

Fast response time (~4 ms)

SIL 3 / PL e / Category 4 compliant

DIN-rail mount, IP20 housing

Operating temp: -25 to +60 °C

Typical Applications:

Emergency stop button integration

Light curtain or safety door monitoring

Safety PLC input expansion

Industrial automation systems requiring certified fail-safe I/O

Condition:

[Choose one]

New – Unused, sealed packaging

Used – Fully tested and functional, clean condition, minor cosmetic wear