Machinery Speed Monitoring Solution – Bently Nevada 3500/50 133388-02 | 3500 Series
Where This Product Is Used
The Bently Nevada 3500/50 Tachometer Module (P/N 133388-02) is a core component of the 3500 Series Machinery Protection System, purpose-built for continuous speed and overspeed monitoring in rotating machinery across critical industrial environments:
- Steam & Gas Turbines – Real-time shaft speed tracking and overspeed trip protection in power generation plants
- Centrifugal & Axial Compressors – Speed monitoring for surge prevention and process control in oil & gas facilities
- Pumps & Fans – Rotational speed feedback for variable-speed drive systems in water treatment and HVAC
- Gearboxes & Expanders – Multi-channel speed ratio monitoring in petrochemical and refinery applications
- Marine Propulsion Systems – Shaft RPM monitoring for vessel drive trains and auxiliary machinery
Technical Specifications
- Part Number: 133388-02
- Model: 3500/50
- Series: Bently Nevada 3500 Machinery Protection System
- Module Type: Tachometer / Overspeed Detection Module
- Channels: 2 tachometer inputs per module
- Speed Range: 1 – 99,999 RPM
- Input Signal: Compatible with proximity probes (eddy-current), magnetic pickups, and optical sensors
- Overspeed Trip: Configurable hardware and software trip setpoints
- Output: 4–20 mA analog, relay contacts, and digital communication via rack backplane
- Power Supply: Supplied via 3500 rack backplane (no external power required)
- Operating Temperature: 0°C to +65°C
- Approvals: SIL 1 capable; CE marked
- Form Factor: Single-slot 3500 rack module
- Weight: 800 g (approx.)
Why Engineers Specify This Model
- Dual-channel redundancy – Two independent tachometer inputs per module support 2oo2 voting logic for SIL-rated overspeed protection
- Wide RPM range – Covers slow-roll (barring gear) through full-speed operation without hardware changes
- Seamless 3500 rack integration – Hot-swappable design minimizes downtime during maintenance windows
- Configurable via System 1 / Rack Configuration Software – No hardware jumpers; all setpoints managed digitally
- Proven field reliability – Deployed in API 670-compliant protection systems across upstream, midstream, and downstream oil & gas
Complete System Bill of Materials
The 3500/50 module operates within the Bently Nevada 3500 rack ecosystem. A typical overspeed protection system includes:
- 3500/05 Rack (19″ or 3U chassis)
- 3500/15 Power Supply Module
- 3500/50 Tachometer Module 133388-02 (this item)
- 3500/22M Transient Data Interface (optional, for waveform capture)
- Proximity Probe + Extension Cable + Proximitor Sensor (e.g., 3300 XL 8mm series)
- 3500/92 Communication Gateway (Modbus / Ethernet)
Compliance & Industry Standards
- API 670 – Machinery Protection Systems (5th Edition)
- IEC 61511 – Functional Safety for SIL-rated overspeed protection loops
- IEC 61508 – Functional Safety of E/E/PE Safety-related Systems
- CE Marking – EMC Directive compliance for European installations
- ISO 10816 / ISO 20816 – Mechanical vibration evaluation (system-level)
Quality Assurance & Sourcing
All Bently Nevada modules listed on Konmask.com are sourced through verified industrial supply channels. Each unit undergoes:
- Visual and dimensional inspection against OEM datasheets
- Functional power-on verification where applicable
- Secure anti-static packaging with tamper-evident sealing
- Traceability documentation available upon request
We supply both new surplus and factory-refurbished units. Condition is clearly stated at time of quotation.
How to Source This Part
Ready to order or need a formal quotation? Contact our technical sales team:
- Email: support@konmask.com
- Phone / WhatsApp: +0086 19859288691
- Lead Time: Typically 3–7 business days for in-stock units; expedited options available
- Payment: T/T, PayPal, and major credit cards accepted
- Export: Worldwide shipping with full customs documentation
Application-Specific FAQ
Q: Can the 3500/50 133388-02 replace an older 3500/50 with a different suffix (e.g., -01)?
A: Suffix variants may differ in firmware revision or hardware configuration. Always verify compatibility with your rack configuration file before substitution. Contact us for cross-reference support.
Q: Does this module support Keyphasor® inputs?
A: The 3500/50 accepts standard tachometer signals. Keyphasor® functionality is handled by the dedicated 3500/25 Keyphasor Module in the same rack.
Q: Is the 3500/50 compatible with System 1 Evolution software?
A: Yes. The module integrates with both legacy System 1 and System 1 Evolution (S1Evo) platforms via the 3500 rack communication gateway.
Q: What probe types are compatible?
A: The module accepts signals from eddy-current proximity probes (3300/3500 series Proximitors), passive magnetic pickups, and active Hall-effect sensors.
Q: Can I use this module for overspeed trip in a SIL 2 loop?
A: The 3500/50 is SIL 1 capable as a single module. SIL 2 architectures require redundant voting configurations — consult your functional safety engineer and Bently Nevada’s SIL documentation.
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Contact: support@konmask.com | +0086 19859288691
