Bently Nevada 3500 Series Modules: 133396-01 I/O Module

Technical Dossier

Product Details And Specifications

Bently Nevada 3500 Series Technical Notes

The Evolution of 3500 Series Architecture

The 3500 Series was introduced in the early 1990s as a modular replacement for the earlier Bently Nevada 3300 and 7200 Series single-channel monitors. The platform was engineered around a 19-inch rack chassis with a dedicated backplane bus, enabling hot-swap module replacement without system shutdown — a critical requirement for continuous-process industries.

Generation 1 (1990s): Initial release established the rack/module topology with the 3500/01 Power Supply, 3500/20 Rack Interface Module (RIM), and early transducer I/O modules. Communication was limited to RS-232/RS-422 serial interfaces.

Generation 2 (2000s): Introduction of Ethernet-based communication via the 3500/92 Communication Gateway Module, enabling integration with DCS platforms (Honeywell DeltaV, Emerson Ovation, ABB 800xA). The 3500/22M Transient Data Interface (TDI) was added for waveform capture and dynamic data analysis.

Generation 3 (2010s–present): Enhanced cybersecurity hardening, IEC 62443 alignment, and expanded Modbus TCP/OPC-UA support. The 3500/53 Overspeed Detection Module was updated to meet SIL 2 requirements. Legacy modules from Generation 1 remain physically compatible with current rack chassis, though firmware interoperability must be verified for mixed-generation configurations.

The 3500 Series is now in a mature/sustained phase. Bently Nevada continues to supply spare parts and firmware updates, but new feature development is concentrated on the System 1 software platform and next-generation Orbit 60 Series. For sites committed to long-term 3500 operation, DriveKNMS maintains a dedicated inventory of both current-production and end-of-life 3500 modules.

3500 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the Bently Nevada 3500 Series. Each entry includes a concise functional description for rapid identification by maintenance engineers and procurement teams.

133396-01: I/O module providing analog and discrete signal interface for 3500 rack backplane integration.

3500/01-01-00-00-00: Standard AC/DC power supply module, 115/230 VAC input, rack-mounted.

3500/01-01-01-00-00: Dual-redundant power supply module for continuous-process critical applications.

3500/20-01-00-00: Rack Interface Module (RIM); manages rack-level communication and system configuration.

3500/22M-01-00-00: Transient Data Interface (TDI); captures full waveform data for dynamic analysis.

3500/25-01-00-00: Enhanced Keyphasor module; provides once-per-revolution reference signal for phase and speed measurement.

3500/32-01-00-00: 4-channel relay output module; configurable for alert and danger trip logic.

3500/33-01-00-00: 16-channel relay output module; high-density discrete output for complex trip matrix configurations.

3500/40M-01-00-00: Proximitor/Seismic monitor module; dual-channel radial vibration and position measurement.

3500/42M-01-00-00: Proximitor/Seismic monitor module; 4-channel configuration for high-density bearing monitoring.

3500/44M-01-00-00: Aeroderivative turbine monitor; specialized for high-speed, lightweight gas turbine applications.

3500/45-01-00-00: Position monitor module; measures rotor axial position (thrust) and differential expansion.

3500/50M-01-00-00: Tachometer module; speed measurement and overspeed detection, single-channel.

3500/53-01-00-00: Overspeed Detection Module (ODM); SIL 2-rated triple-redundant overspeed protection.

3500/60-01-00-00: Temperature monitor module; 4-channel thermocouple/RTD input for bearing and process temperature.

3500/61-01-00-00: Enhanced temperature monitor; 6-channel RTD/thermocouple with expanded range and resolution.

3500/64-01-00-00: Dynamic pressure monitor; measures combustion dynamics and pulsation in gas turbines and compressors.

3500/70-01-00-00: Process variable monitor; 4-channel analog input (4–20 mA) for pressure, flow, and level signals.

3500/72-01-00-00: Enhanced process variable monitor; 8-channel analog input with expanded alarm configuration.

3500/92-01-00-00: Communication Gateway Module; Modbus RTU/TCP, OPC-DA, and Ethernet interface to DCS/SCADA.

Sourcing Hard-to-Find & Obsolete 3500 Series Parts

A significant portion of the global 3500 Series installed base operates on modules that Bently Nevada has transitioned to limited-availability or end-of-life status. Generation 1 I/O modules, early RIM variants, and first-generation relay output cards are no longer manufactured but remain in active service at refineries and power plants with 20–30 year operational horizons.

Quality Control for the 3500 Series Range

The 3500 Series backplane architecture uses a proprietary high-speed serial bus for inter-module communication. Functional verification of 3500 modules requires rack-level testing rather than standalone bench testing, as module health is partially determined by backplane bus integrity and RIM communication handshake.