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Product specification sheet
EL1904Document: AV-BEC-EL1904
Beckhoff · Machine safety
Safety input terminal TwinSAFE Beckhoff model EL1904
Four-channel safety input terminal for protective signals in TwinSAFE and FSoE architectures.
- Manufacturer part number
EL1904- Brand
- Beckhoff
- Category
- Machine safety
- Catalog status
- Available on request
Technical specifications
- Safety inputs
- 4 Channel, 24V DC
- Safety protocol
- TwinSAFE / FSoE
- Typical response time
- 4 ms
- Safety level
- to Cat. 4 / PL e and SIL 3
- Mounting
- DIN rail
- Protection rating
- IP20
Manufacturer manual · EL1904 / EN / 3.3.1 · en · PDF · 3.3.1 · 2025-02-17Manufacturer source: Beckhoff · Document author: Beckhoff Automation GmbH & Co. KG · Exact model verified · Covered models: EL1904 · Checked: 2026-10-16Official manufacturer source
This sheet provides a quick technical summary. For design, installation and final selection, review the latest official manufacturer documentation and verify the complete part number.