Bently Nevada 3500/04-138257-01 – Earthing Module Faceplate | 3500 Series Rack Protection Platform
Engineering Background: The Bently Nevada 3500 Series is the industry-standard continuous vibration monitoring platform deployed across rotating machinery in power generation, oil & gas, petrochemical, and heavy industrial facilities worldwide. The 3500/04 Earthing Module (also referred to as the Grounding Module) is a critical rack-level component that ensures the entire 3500 monitoring rack maintains a safe, low-impedance earth reference — a prerequisite for accurate signal integrity and personnel safety in high-EMI plant environments.
Product Positioning: Part number 138257-01 is the OEM faceplate assembly for the 3500/04 Earthing Module slot. It occupies a dedicated slot in the 3500 rack and provides the mechanical and electrical interface for rack grounding. Procurement engineers sourcing replacement faceplates or completing rack assemblies will find this component essential for maintaining system compliance with Bently Nevada rack wiring specifications.
Complete Technical Specifications
- Manufacturer: Bently Nevada (Baker Hughes)
- Part Number: 138257-01
- Model / Series: 3500/04 Earthing Module Faceplate
- Platform: Bently Nevada 3500 Series Machinery Protection System
- Function: Rack earthing / grounding reference for 3500 Series chassis
- Module Slot: Dedicated earthing slot within 3500 rack (Slot 0 / leftmost position per rack wiring diagram)
- Mounting: Standard 3500 rack card-edge insertion with front-panel faceplate retention
- Weight: Approx. 220 g
- Compliance: Designed to meet Bently Nevada rack grounding specifications per 3500 System Installation Manual
- Condition: New / Surplus New / Refurbished (specify at inquiry)
- Country of Origin: USA
Proven Application Environments
- Gas turbine and steam turbine vibration monitoring racks
- Compressor train protection systems in LNG and refinery facilities
- Pump and motor protection panels in petrochemical plants
- Power generation BOP (Balance of Plant) monitoring cabinets
- Offshore platform machinery protection enclosures
- Any 3500 Series rack requiring compliant earthing module replacement
Engineering Advantages
- Signal Integrity: Establishes a stable, low-noise earth reference that minimizes common-mode interference across all I/O modules in the rack
- Personnel Safety: Ensures rack chassis is bonded to plant earth, meeting IEC and NEC grounding requirements for instrumentation panels
- OEM Compatibility: Direct form-fit-function replacement for existing 3500/04 slots — no rack modification required
- Rack Completeness: Required for Bently Nevada factory acceptance testing (FAT) and site acceptance testing (SAT) sign-off
- Long Service Life: Passive component design with no active electronics — inherently high MTBF
System Architecture & Signal Flow
Within the 3500 rack architecture, the 3500/04 Earthing Module occupies the leftmost slot and connects the rack backplane ground bus to the cabinet earth stud via the front-panel earthing terminal. This single-point grounding topology prevents ground loops between transducer inputs and the monitoring system, which is critical when measuring low-amplitude vibration signals (typically 0–25 mV full scale) in electrically noisy plant environments. The faceplate (138257-01) provides the mechanical retention and terminal access point for the earthing conductor.
Sourcing & Quality Verification
- All units sourced from authorized distributors, OEM surplus channels, or certified refurbishers
- Physical inspection performed: part number label, faceplate condition, connector integrity
- Cross-referenced against Bently Nevada 3500 Series parts catalog prior to listing
- Serialization and revision level documented upon request
- Certificate of conformance (CoC) available for new/surplus-new units
- 30-day functional warranty on all shipped units; extended warranty available on request
Procurement Process
- Submit RFQ via support@konmask.com or WhatsApp +0086 19859288691
- Receive quotation with lead time, condition grade, and CoC availability within 24 hours
- Confirm order — payment via T/T, PayPal, or trade terms for qualified accounts
- Shipping via DHL / FedEx / UPS with full tracking; export documentation provided
- Post-delivery technical support available from our automation engineering team
Technical FAQ
Q: Is the 3500/04-138257-01 interchangeable with other 3500/04 part numbers?
A: The 138257-01 is the standard faceplate assembly. Confirm your rack revision and slot assignment against the 3500 System Installation Manual (Bently Nevada P/N 129766-01) before ordering.
Q: Can the rack operate without the earthing module installed?
A: No. Bently Nevada specifies that the earthing module must be installed in all 3500 racks. Operating without it voids system warranty and may compromise signal accuracy and safety compliance.
Q: Do you supply the full 3500 rack assembly or individual modules?
A: Both. Contact us with your complete BOM for a consolidated quotation covering all 3500 Series modules required for your project.
Q: What is the typical lead time?
A: In-stock units ship within 1–3 business days. Sourced units typically 5–15 business days depending on availability.
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