BRAUN E16A342 Overspeed Protection Modules E16A342.011

Technical Dossier

Product Details And Specifications

BRAUN E16A342 Series Technical Notes

The BRAUN E16A342 series represents a dedicated line of overspeed protection and turbine safety monitoring modules engineered for continuous operation in critical heavy-industry environments. These units are deployed across petrochemical complexes, nuclear power stations, offshore platforms, and large-scale refinery installations where shaft overspeed events must be detected and responded to within milliseconds. The E16A342 architecture integrates directly with turbine control backplanes and distributed control system (DCS) racks, providing hardwired trip relay outputs, configurable speed thresholds, and redundant sensor input channels. Its compact DIN-rail and rack-mount form factors have made it a standard reference in turbine protection panels across Europe, the Middle East, and Asia-Pacific since its introduction.

The Evolution of E16A342 Architecture

The E16A342 lineage traces its origins to BRAUN's early turbine protection relay platforms of the 1980s, which relied on discrete analog speed-sensing circuits and electromechanical trip relays. The transition to the E16A342 designation marked a shift toward modular, card-based electronics with digital threshold configuration, replacing potentiometer-set analog comparators with DIP-switch and later firmware-programmable setpoints. Early variants (E16A342.001–E16A342.005) used TTL-level logic and were compatible with BRAUN's first-generation DCS backplanes. Mid-generation units (E16A342.006–E16A342.010) introduced NAMUR-compatible proximity sensor inputs, dual-channel redundancy, and isolated 4–20 mA speed retransmission outputs, enabling integration with third-party SCADA systems. The E16A342.011 represents the mature, field-proven variant of this series, incorporating optically isolated digital inputs, configurable overspeed trip levels (typically 110–120% of rated speed), self-test relay output, and enhanced EMC shielding compliant with IEC 61000-4. As the broader E16A342 series has entered its end-of-production lifecycle, BRAUN and its authorized service network have transitioned support to successor platforms; however, the installed base of E16A342 modules in long-lifecycle plants (nuclear, refinery, hydro) continues to demand original spare parts and certified refurbished units for the foreseeable future.

E16A342 Full Catalog & Functionalities (SKU List)

The following SKUs represent the documented E16A342 series range. Each entry reflects a distinct hardware revision or functional variant within the overspeed protection module family:

E16A342.001: First-generation overspeed relay, analog threshold, single-channel input.
E16A342.002: Dual-channel analog input variant with independent trip relays.
E16A342.003: Extended temperature range version (-20°C to +70°C) for outdoor panels.
E16A342.004: NAMUR proximity sensor input, single-channel, 24 VDC supply.
E16A342.005: NAMUR dual-channel with common trip bus output.
E16A342.006: Digital threshold configuration via DIP switch, isolated relay output.
E16A342.007: 4–20 mA speed retransmission output added, single-channel.
E16A342.008: Dual-channel with 4–20 mA retransmission and RS-485 diagnostic port.
E16A342.009: Firmware-programmable setpoints, HART-compatible speed output.
E16A342.010: Redundant power supply input (24/48 VDC), enhanced EMC shielding.
E16A342.011: Optically isolated digital inputs, self-test relay, IEC 61000-4 compliant, current production reference.
E16A342.012: SIL 2 certified variant with proof-test interval documentation.
E16A342.013: Triple-redundant (2oo3) voting logic module for critical turbine applications.
E16A342.014: Rack-mount version with front-panel LED speed bar display.
E16A342.015: Communication gateway variant with Modbus RTU and PROFIBUS DP interfaces.
E16A342.016: High-frequency input version for steam turbines above 10,000 RPM.
E16A342.017: Replacement module with backward-compatible pinout for E16A342.001–.005 sockets.

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