Product Brief: Bently Nevada 3500/42-06-RU (4-Channel Proximitor/Seismic Monitor with Russian Approvals)
The 3500/42-06-RU is a specialized version of the Bently Nevada 3500 series 4-channel Proximitor/Seismic Monitor. The -06 configuration code indicates a standard 4-channel monitor (accepting both eddy current proximity probes and seismic transducers), while -RU denotes Russian approvals (EAC/CU-TR) for use in the Customs Union (Russia, Belarus, Kazakhstan, Armenia, Kyrgyzstan). The module is designed to meet GOST and EAC certification requirements for machinery protection in Russian and CIS oil & gas, power generation, and petrochemical facilities.
Each channel can be independently configured for Proximitor (eddy current probe) input or Seismic (accelerometer/velocity sensor) input for measurement of radial vibration, axial (thrust) position, eccentricity, casing vibration, and differential expansion.
Key Features
4 independent input channels – each configurable for Proximitor or Seismic.
Russian approvals (EAC/CU-TR) – meets GOST, TR CU 012/2011 (safety), and TR CU 004/2011 (EMC) requirements.
Supports Bently Nevada Proximitor sensors (3300, 3300 XL, 7200 series) for shaft relative motion.
Supports accelerometers (IEPE) or velocity transducers for casing/absolute vibration.
Programmable for radial vibration, axial position, eccentricity, casing acceleration/velocity.
Provides Keyphasor tracking output to backplane for synchronous analysis.
Configurable scaling, alarm setpoints (Alert/Danger), time delays.
Requires external relay module (3500/32) for physical alarm/trip outputs.
Parameters (Table)
| Parameter | Specification |
|---|---|
| Model | 3500/42 |
| Configuration Code | 3500/42-06-RU |
| Product Type | 4-channel Proximitor/Seismic Monitor with Russian approvals (EAC/CU-TR) |
| Dimensions (Height x Width x Depth) | 241 mm x 25 mm x 242 mm (9.5 in x 1.0 in x 9.5 in) – occupies one slot in 3500 rack |
| Weight (approx.) | 0.9 kg (2.0 lb) |
| Number of Input Channels | 4 independent channels |
| Input Type (per channel) | Field-selectable: Proximitor OR Seismic |
| Proximitor Input Signal | -0.8 VDC to -22 VDC (Bently Nevada 3300/3300 XL/7200 series) |
| Seismic Input Signal | IEPE accelerometer (2–20 mA constant current) or velocity coil (±5 to ±24 V) |
| Measurement Types (Proximitor) | Radial vibration (µm pk-pk, mils pk-pk), axial position (Vdc, mm, mils), eccentricity |
| Measurement Types (Seismic) | Acceleration (g pk, m/s² pk), Velocity (mm/s pk, in/s pk) |
| Frequency Response (Proximitor) | 0 to 10 kHz (-3 dB) |
| Frequency Response (Seismic) | 0.5 Hz to 10 kHz (depends on sensor) |
| Accuracy | ±0.5% of full scale (Proximitor); ±1% of full scale (Seismic) |
| Dynamic Range | 80 dB (typical) |
| Alarm Outputs | 2 per channel (Alert & Danger) – requires 3500/32 relay module |
| Backplane Outputs | Buffered raw signal (BUF), Keyphasor tracking, processed data |
| Communication | Via 3500 rack interface (3500/20, 3500/22) to DCS/PLC/SCADA |
| Operating Temperature | -30°C to +65°C (-22°F to +149°F) |
| Storage Temperature | -40°C to +85°C (-40°F to +185°F) |
| Power Consumption | 6.5 W (typical from rack backplane) |
| Certifications (Russian) | EAC (CU-TR 012/2011 – Machinery Safety; CU-TR 004/2011 – EMC); GOST R |
| Other Certifications | CE, CSA (with appropriate system), ATEX (system dependent) |
Application Scenarios (use cases)
| Application Area | Description |
|---|---|
| Russian Gas Compressor Station (Gazprom) | Used in 3500 racks for radial vibration and thrust position monitoring of centrifugal compressors – requires EAC approval. |
| Russian Thermal Power Plant (Steam Turbine) | Mixed configuration: shaft relative vibration (proximity) + bearing housing vibration (seismic) on turbine-generator trains. |
| Kazakhstan Oil Refinery (Compressor Train) | EAC-certified monitor for wet gas compressors where hazardous area and Russian certification are mandatory. |
| Belarus Hydro Power Plant | Low-speed seismic accelerometers for runner/housing vibration + proximity probes for shaft runout (eccentricity). |
| Russian LNG Plant (Turboexpander) | Both proximity and seismic inputs in one module, saving rack space in compact EAC-certified panels. |
| Nuclear Power Plant (Auxiliary Turbines) | EAC-approved monitor for turbine-driven pumps and feedwater pumps requiring Russian nuclear regulatory acceptance. |
| CIS Petrochemical Plant (Cracker Compressor) | Mixed monitoring of high-speed compressor shaft vibration and casing vibration, fully compliant with local standards. |
| Export Projects to Russia / EAC Region | Required for any 3500 series system being installed in Russia, Belarus, Kazakhstan, Armenia, or Kyrgyzstan to obtain local certification. |
Notes
-06 is a standard 4-channel Proximitor/Seismic monitor (identical electrical performance to 3500/42-01-01). The -06 suffix primarily refers to firmware version and factory configuration – verify specific I/O and options with factory data sheet.
-RU indicates EAC/CU-TR approvals – the module is shipped with a Russian Certificate of Conformity (EAC) and is labeled accordingly.
Not intrinsically safe – for hazardous area probe connections in Russian applications, use 3500/42M 140482-01 (with internal IS barriers) and verify the IS version also carries EAC approval (check with Bently Nevada for current certification status).
Must be used in EAC-certified 3500 rack system – the entire 3500 system (rack, power supplies, communication modules, relay modules) must also carry EAC certification to maintain compliance.
Russian documentation – the module typically ships with Russian language manuals (or supplement) and EAC declaration of conformity.
Field termination requires compatible termination module (e.g., 3500/42M for proximity + seismic combined) – sold separately.
Keyphasor reference must be provided by a 3500/25 Keyphasor Module elsewhere in the rack for synchronous measurements.
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