Description
Detailed parameter table
| Parameter name | Parameter value |
| Product model | 3500/33-01-00 |
| Manufacturer | Bently Nevada |
| Product category | Multi-channel vibration monitoring module |
| Electrical performance | 24V DC power supply; Power consumption: 6.5W max |
| Physical size | Width: 24.4mm, Height: 241.3mm, Depth: 242mm |
| Interface type | Backplane connector for 3500 series rack; 8 analog input channels; 4 relay outputs (SPDT) |
| Measurement range | Vibration: 0-50 mm/s peak; Displacement: 0-500 μm peak-to-peak |
| Frequency response | 0.1 Hz to 10 kHz |
| Alarm capabilities | Configurable dual-level alarms (warning/danger); Voting logic support |
| Environmental requirements | Operating temperature: -40°C to +70°C; Humidity: 5% – 95% (non-condensing) |
| Installation method | Rack-mountable in 3500 series racks; Occupies 1 standard slot |
| Compatibility | Works with 3500/42M 140734-02, 3500/25 125792-01, 87199-01 sensors, and 170180-01-00 software |
BENTLY 3500/33-01-00
Product introduction
The Bently Nevada 3500/33-01-00 is a specialized multi-channel vibration monitoring module, designed as a key component of the 3500 series machinery protection system. It focuses on real-time analysis of vibration and displacement signals from rotating equipment, serving as a critical diagnostic tool for early fault detection.
Building on the capabilities of the standard 3500/33 module, the 3500/33-01-00 features 8 input channels—double the capacity of its predecessor—enabling comprehensive monitoring of multiple machinery points. It processes conditioned signals from modules like the 3500/42M 140734-02, converting raw vibration data into actionable insights such as bearing health, rotor imbalance, or misalignment.
Integral to industrial automation systems, the 3500/33-01-00 communicates seamlessly with the 3500/25 125792-01 Keyphasor module to synchronize vibration data with rotational phase, enabling precise order analysis. Its dual-level alarm system and relay outputs ensure timely protective actions, making it indispensable for critical assets in power generation, oil and gas, and manufacturing industries.
Core advantages and technical highlights
Expanded channel capacity: With 8 input channels, the 3500/33-01-00 can monitor multiple measurement points on a single machine or across interconnected equipment—such as monitoring all bearings on a turbine-generator set. This expanded capacity reduces the need for additional modules, simplifying system architecture while providing a holistic view of machinery health. It efficiently processes signals from 87199-01 eddy current sensors, ensuring no critical vibration data is missed.
Advanced alarm management: The module features configurable dual-level alarms (warning and danger) with flexible voting logic, allowing users to set thresholds based on industry standards or equipment specifications. This capability ensures reliable alarm triggering—for example, requiring two consecutive readings above the danger threshold before activating a shutdown via relay outputs. The 3500/33-01-00 also supports alarm latching and manual reset, preventing false alarms from disrupting operations.
Seamless data synchronization: By integrating with the 3500/25 125792-01 Keyphasor module, the 3500/33-01-00 time-stamps vibration data with rotational phase information. This synchronization enables advanced diagnostics like order tracking and polar plots, which are critical for identifying faults tied to specific rotational positions—such as a cracked rotor blade or uneven wear on a gear tooth. When paired with data from the 3500/42M 140734-02, it provides a comprehensive analysis of machinery dynamics.
Enhanced integration with conditioning modules: The 3500/33-01-00 is optimized to work with high-performance signal conditioners like the 3500/42M 140734-02, receiving pre-processed vibration signals for further analysis. This partnership ensures that noise-filtered, high-resolution data from 87199-01 sensors is accurately evaluated, maximizing the module’s ability to detect subtle fault indicators—such as early bearing degradation characterized by high-frequency vibration harmonics.
Typical application scenarios
In a combined-cycle power plant, the 3500/33-01-00 monitors a gas turbine’s vibration across 8 points: 6 bearing housing vibrations and 2 shaft displacement measurements. It receives conditioned signals from the 3500/42M 140734-02, which processes data from 87199-01 sensors. Synchronized with the 3500/25 125792-01, it identifies a 2x rotational frequency vibration spike in the #4 bearing, indicating misalignment. The module triggers a warning alarm, prompting operators to adjust the turbine during the next maintenance window, avoiding costly unplanned downtime.
At an offshore oil platform, the 3500/33-01-00 is deployed on a centrifugal compressor, monitoring vibration in the main bearing, impeller, and gearbox. Its 8 channels process signals from accelerometers and eddy current sensors, conditioned by the 3500/42M 140734-02. When detecting high vibration in the gearbox (3x rotational frequency), the module’s voting logic confirms the issue across three consecutive readings, activating a danger alarm and shutting down the compressor via relay outputs—preventing catastrophic gear failure in the harsh marine environment.
In a paper mill’s dryer section, the 3500/33-01-00 monitors 8 dryer rolls, analyzing vibration data to detect imbalance or bearing wear. It correlates vibration trends with speed data from the 3500/25 125792-01, identifying that roll #6 exhibits increased vibration at higher speeds. This insight, displayed on the 3500/50 288062-02 interface, allows maintenance to rebalance the roll during a scheduled shutdown, reducing paper defects caused by uneven drying.
BENTLY 3500/33-01-00
Related model recommendations
3500/42M 140734-02: Advanced signal conditioner that provides pre-processed vibration signals to the 3500/33-01-00 for analysis.
3500/25 125792-01: Keyphasor module that synchronizes rotational phase data with the 3500/33-01-00’s vibration measurements.
87199-01: Eddy current sensor whose raw signals, after conditioning, are analyzed by the 3500/33-01-00.
170180-01-00: Software used to configure alarm thresholds, view trend data, and perform advanced diagnostics with the 3500/33-01-00.
3500/50 288062-02: Operator interface module that displays real-time vibration data and alarms from the 3500/33-01-00.
3500/60: Relay module that extends the 3500/33-01-00’s alarm capabilities for complex protection sequences.
3500/05: Rack interface module that facilitates communication between the 3500/33-01-00 and other 3500 series components.
149992-01: Shielded cable recommended for connecting the 3500/33-01-00 to upstream conditioning modules.
Installation, commissioning and maintenance instructions
Installation preparation: Before installing the 3500/33-01-00, power off the 3500 series rack and use an anti-static wrist strap. Mount the module in a single rack slot, securing it with screws torqued to 0.6 Nm. Connect input channels to the 3500/42M 140734-02 or directly to sensors using shielded twisted-pair cable, ensuring proper grounding at the sensor end. Route wiring separately from power cables to minimize electromagnetic interference. Verify that the rack has adequate ventilation to dissipate heat.
Maintenance suggestions: Conduct monthly visual inspections of the 3500/33-01-00 to check for loose connections or corrosion on terminal blocks. Clean terminals with a dry cloth if needed. Calibrate annually using 170180-01-00 software and a vibration calibrator, verifying accuracy across the 0-50 mm/s range. Test relay outputs quarterly by simulating alarm conditions to ensure proper functionality. If channels display erratic readings, check connections to the 3500/42M 140734-02 or sensors before replacing the module. Back up configurations semi-annually to streamline recovery.
Service and guarantee commitment
The 3500/33-01-00 is backed by a 12-month warranty covering manufacturing defects, including signal processing errors, relay failures, or connectivity issues. During this period, Bently Nevada provides free repair or replacement of defective units, along with technical support for integration with the 3500/42M 140734-02 and other 3500 series components.
Our global service team offers 24/7 assistance, with remote diagnostics available via the 3500/05 interface to minimize downtime. Extended warranty options (up to 3 years) include annual calibration checks and priority access to software updates. Built on Bently Nevada’s expertise in vibration monitoring, the 3500/33-01-00 is guaranteed to deliver reliable performance, ensuring critical machinery is protected with accurate, timely fault detection.
