Beckhoff EK1914 Safety Terminal Module EtherCAT FSoE Coupler

Technical Dossier

Product Details And Specifications

Beckhoff EK1914 Series Technical Notes

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.

The Evolution of EK1xxx Safety Architecture

The EK1xxx coupler family originated with the EK1100, a standard EtherCAT bus coupler introduced in the early 2000s as Beckhoff expanded its EtherCAT I/O ecosystem. The EK1100 provided the foundational E-bus segment interface but carried no safety logic. As functional safety requirements tightened under IEC 61508 Ed.2 (2010) and the proliferation of machinery directive 2006/42/EC, Beckhoff introduced the EK1960 TwinSAFE compact controller — a coupler-form-factor device capable of hosting safety programs locally. The EK1914 represents the next architectural step: a coupler that combines FSoE slave communication, local TwinSAFE logic execution, and mixed safe I/O (4 DI + 4 DO) in a single 12 mm housing. Compatibility considerations are significant for retrofit projects: EK1914 requires TwinCAT 3.1 Build 4022 or higher for TwinSAFE project integration, and FSoE master functionality must reside in a TwinSAFE controller (EK1960, EL6910, or CX-series with TF6910 license). Legacy EK1100-based segments can coexist on the same EtherCAT ring but cannot participate in the FSoE safety domain. Migration from relay-based SIS to EK1914-based architectures typically involves re-validation under IEC 61511-1 Clause 11 and updated FMEA documentation.

EK1914 Full Catalog & Functionalities — EK1xxx SKU Reference List

The following SKUs represent the verified Beckhoff EK1xxx coupler and related TwinSAFE terminal product range. Each entry reflects a distinct hardware function within the EtherCAT safety I/O architecture.

EK1100: Standard EtherCAT bus coupler, E-bus power supply, no safety logic, 2A E-bus current.
EK1101: EtherCAT coupler with ID switch for topology-based addressing in distributed cabinet layouts.
EK1110: EtherCAT extension, extends E-bus segment over EtherCAT infrastructure to remote I/O islands.
EK1122: 2-port EtherCAT junction coupler for star topology wiring without managed switches.
EK1521: EtherCAT coupler with single-mode fiber optic interface, 1310 nm, for electrically isolated long-distance segments.
EK1541: EtherCAT coupler with plastic optical fiber (POF) interface for short-range EMI-immune segments.
EK1818: EtherCAT coupler with 8 digital inputs and 8 digital outputs integrated, standard (non-safety) I/O.
EK1828: EtherCAT coupler with 8 digital outputs integrated, 24 VDC, 0.5 A per channel, standard I/O.
EK1914: EtherCAT coupler with 4 FSoE digital safety inputs + 4 FSoE digital safety outputs, TwinSAFE logic, SIL 3 / PLe.
EK1960: TwinSAFE compact controller, FSoE master/slave, up to 128 safety addresses, local safety program execution.
EL1904: 4-channel digital safety input terminal, FSoE, 24 VDC, IEC 61131-2 Type 3, SIL 3 / PLe.
EL2904: 4-channel digital safety output terminal, FSoE, 24 VDC / 0.5 A per channel, SIL 3 / PLe.
EL6910: TwinSAFE logic terminal, FSoE master, up to 128 connections, replaces EL6900 in new designs.
EL6900: TwinSAFE logic terminal (legacy), FSoE master, up to 63 connections, EOL — long-term spare support only.
EL1918: 8-channel digital safety input terminal, FSoE, 24 VDC, for high-density SIS panel designs.
EL2918: 8-channel digital safety output terminal, FSoE, 24 VDC / 0.5 A, for high-density actuator wiring.
EL1988: 8-channel digital input terminal, standard, 24 VDC, used alongside safety terminals for non-SIL diagnostics.
EK1501: EtherCAT coupler with multimode fiber optic interface for medium-distance segment isolation.

Sourcing Hard-to-Find & Obsolete EK1914 and EK1xxx Parts

Q: How is condition confirmed before quotation?
A: Available condition, photos, test records and documentation are checked according to the requested model and sourcing channel before a formal RFQ response.