Product Core Brief
- Model: 330980-51-00
- Brand: Bently Nevada (Baker Hughes)
- Series: 3300 XL NSv (Narrow Side View) Proximitor Signal Conditioner Series
- Suffix Decode (330980-XX-YY):
-51= Supports 5.0 meter total NSv transducer system length, DIN rail compact mounting form factor-00= No supplementary ATEX / IECEx / CSA hazardous location agency certifications, standard industrial grade
- Core Function: Dedicated NSv eddy-current signal conditioner, receives RF signal from compact 3300 NSv miniature proximity probes, converts high-frequency RF signal into DC gap voltage (static shaft offset) + AC vibration voltage; delivers standardized 7.87 V/mm (200 mV/mil) linear output for radial vibration, axial thrust displacement, Keyphasor rotational speed measurement on small-shaft, narrow-install-space compressors & aero-derivative turbines.
- Product Type: Standalone DIN rail mount miniature Proximitor sensor (signal converter), works with full 3500 TSI monitor rack system
- Key Specs: 5m full system length support | DIN rail compact housing | 75Ω NSv probe impedance matching | SpringLock screw terminal power/output | Enhanced EMI/RFI suppression
- Condition: New Original (New Surplus), active OEM machinery protection spare, no published obsolescence schedule
Key Technical Specifications
| Parameter | Defined Value |
|---|---|
| Supported Total Transducer Length | 5.0 m (probe + extension cable combined) |
| Matching Probe Series | Exclusively for 3300 XL NSv miniature proximity probes (75Ω coaxial impedance); incompatible with standard 50Ω 8/11mm 3300 XL probes |
| Standard Linear Scale Factor | 7.87 V/mm (200 mV/mil) linear gap output |
| Input Interface | Mini ClickLoc coaxial female RF input port for NSv probe cable |
| Mounting Form Factor | Slim DIN rail mount, high-density cabinet layout compatible |
| Power Supply Input | 24 VDC industrial control power supply |
| Output Terminals | SpringLock quick-release screw terminals: DC gap voltage, AC vibration signal, common ground |
| Operating Temperature Range | −52°C ~ +100°C continuous cabinet operation; storage −52°C ~ +105°C |
| Mechanical Dimension | 81.3 mm × 61.2 mm × 63.5 mm; unit weight ~0.5 kg |
| Electromagnetic Performance | Enhanced RFI/EMI filtering, meets CE EMC Class A without extra shielding |
| Minimum Target Compatibility | Shafts ≥51 mm diameter; flat thrust targets ≥15 mm diameter (designed for small compact rotating equipment) |
| Compliance Standards | API 670 4th Edition, CE mark industrial general certification; suffix 00 excludes Zone/Div hazardous area approvals |
| System Compatibility | Analog output fully interoperable with all 3500 series TSI monitor modules (3500/42M, 3500/50) |
Product Introduction
This NSv Proximitor is purpose-built for equipment with extremely limited mounting clearance, where standard large-body 8/11mm probe systems cannot be installed: small centrifugal compressors, aero gas turbines, screw compressors with narrow bearing housings and miniature shafts.It converts the weak high-frequency RF signal generated by NSv miniature eddy-current probes into two isolated analog signals:
- DC gap voltage: Represents static shaft-to-probe clearance (thrust position monitoring)
- AC vibration voltage: Represents dynamic radial shaft vibration amplitudeThe slim DIN rail housing saves cabinet space for multi-channel dense monitoring setups, and SpringLock terminals enable fast field wiring without screwdrivers.Critical distinction from standard 3300/3300 XL Proximitors: Internal circuit tuning matches 75Ω NSv probe coaxial impedance; cross-use with 50Ω standard probes destroys linearity and produces severe measurement drift errors. A complete NSv measurement stack requires: NSv Probe + optional NSv extension cable + this NSv Proximitor + 3500 rack monitor module.
Firmware & Software Compatibility Notes
This Proximitor is an analog signal conversion hardware device with no onboard firmware. System compatibility rules apply to paired 3500 TSI rack monitors:
- Minimum compatible 3500 monitor firmware revision: Revision G
- Minimum rack configuration software: 3500 Rack Configuration Software v2.00
- All M-series monitor modules inside the 3500/05 chassis must run unified matching firmware revisions to correctly interpret the 200 mV/mil NSv linear output curve.
- Commissioning requirement: Enter total 5m transducer system length into rack software to lock built-in linearity compensation. Always verify full probe + extension cable combined length before startup to eliminate static measurement offset.
Frequently Asked Questions
- Can I disconnect the NSv probe cable while the 24VDC power is live?Yes, power does not need to be shut down for connector disconnection. Unplugging the ClickLoc RF input triggers channel fault alarms on the 3500 rack and loses all vibration/gap data, but no permanent damage occurs to the Proximitor or rack monitor analog input circuits. Fully re-seat the ClickLoc connector until the locking tab clicks to clear fault status.
- Is this part obsolete, and are there direct plug-and-play upgrade variants?This NSv Proximitor remains active OEM stock with no formal end-of-life date. The certified upgrade variant is 330980-51-05, which adds full ATEX/IECEx/CSA hazardous location approvals for refinery/chemical plant classified zones; it shares identical mechanical and electrical performance but requires additional site safety documentation, so it is not zero-modification plug-and-play for general industrial cabinets.
- Will transducer linearity or length calibration data be lost if the rack loses full power?All NSv system length and sensitivity calibration parameters are stored in non-volatile flash memory on the paired 3500 monitor module, not inside this Proximitor. Full rack power loss will not erase transducer configuration; swapping this unit only requires physical reconnection with zero software rework if the total 5m system length stays unchanged.
- What separates New Surplus units from refurbished stock in warranty and reliability?New Surplus original units carry a 12-month full functional warranty covering RF input circuit linearity, DIN rail housing structural integrity, SpringLock terminal conductivity, and EMI filter performance. Refurbished units only offer 3–6 month limited coverage, with hidden risks of aged RF filter capacitors, loose internal solder joints, and degraded ClickLoc connector contacts that cause unstable vibration readings during turbine thermal load cycles.
- Why is New Surplus pricing higher than generic used/refurbished alternatives?All original New Surplus Proximitors pass full factory standardized QC validation: serial number traceability against OEM production logs, full 0–2mm linearity sweep bench testing, 24-hour thermal soak aging test, RF input impedance matching verification, repeated connector plug/unlock durability cycling, and sealed anti-static factory packaging. Refurbished units skip this multi-step electrical and mechanical testing workflow, introducing unplanned downtime risk for safety-critical compressor and turbine vibration protection loops.
- Can this NSv Proximitor work with standard 33010x series 8mm 50Ω proximity probes?No, this hardware is exclusively tuned for 75Ω NSv miniature probe systems. Standard 8/11mm probes use 50Ω triaxial cables with different capacitance matching parameters; cross-mixing hardware completely breaks measurement linearity and creates permanent measurement offset errors. Verify NSv vs standard XL probe impedance before wiring to avoid irreparable signal conversion circuit damage.
- Does this Proximitor locally store vibration waveforms or long-term shaft position trending data?No, this is purely analog signal conditioning hardware with zero data storage memory. All vibration amplitude, thrust displacement, Keyphasor rotational speed historical trending records and fault event logs are captured and stored exclusively on the Slot1 3500/20 TDI master communication gateway module. This unit only converts RF probe signals to analog DC/AC outputs with no waveform capture or data retention capability.
