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Bently Nevada 3500/50M Tachometer Module
Manufacturer: Bently Nevada
Product Number: 3500/50M
Category: Dual-Channel Tachometer Module
Number of Channels: 2
Input Types: Proximity probes, magnetic pickups
Measurement: Shaft speed, acceleration, direction
Frequency Range: 1 to 60,000 RPM
Accuracy: ±0.01%
Product Description
The Bently Nevada 3500/50M is a dual-channel tachometer module designed for precise shaft speed, acceleration, and direction monitoring in rotating machinery. As part of the 3500 Monitoring System, it accepts inputs from proximity probes or magnetic pickups, delivering real-time data for predictive maintenance in critical applications. With configurable alarm setpoints and a built-in keyphasor signal generator, the 3500/50M eliminates the need for a separate keyphasor module, reducing system complexity. Its hot-swap capability and rugged design make it suitable for power plants, oil refineries, and industrial machinery.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 3500/50M |
| Function | Tachometer Module |
| Channels | 2 (Dual-channel) |
| Input Signals | Proximity probes (0–20 VDC) or magnetic pickups |
| Output | Digital speed/acceleration signals, keyphasor |
| Power Supply | 24 VDC ±10% (from 3500 Series rack) |
| Mounting | 3500 Series rack (front slot) |
| Dimensions | 263 mm × 58 mm × 28 mm (W × H × D) |
| Weight | 4.3 kg |
| Operating Temperature | -40°C to +70°C |
Advantages and Features
- Dual-Channel Redundancy: Simultaneously monitors two shafts or redundant paths for critical systems.
- Integrated Keyphasor: Generates conditioned keyphasor signals for phase analysis, reducing hardware costs.
- Flexible Alarming: Supports speed, acceleration, and reverse rotation alarms with user-programmable setpoints.
- Peak Hold Function: Stores maximum speed, reverse speed, or reverse rotation count for post-event analysis.
- Hot-Swap Design: Enables module replacement without system shutdown, minimizing downtime.
Application Areas and Use Cases
Industry Applications:
- Power Generation: Steam and gas turbines.
- Oil & Gas: Compressors and pumps in offshore platforms.
- Manufacturing: High-speed production lines and conveyor systems.
Case Study: A North American petrochemical plant reduced compressor failures by 30% using the 3500/50M to detect sudden speed fluctuations. Early intervention through alarm notifications saved $800,000 in repair costs.
Competitor Comparison
- Higher Integration: Combines tachometer and keyphasor functions in one module, unlike standalone alternatives.
- Extended Redundancy: Supports triple modular redundancy (TMR) configurations for safety-critical systems.
- Wider Temperature Range: Operates reliably in extreme conditions compared to some competitors.
Selection Recommendations
- System Compatibility: Ensure compatibility with 3500 Series racks and 3500/42M monitors.
- Input Type: Choose proximity probes for non-contact measurements or magnetic pickups for cost-effective solutions.
- Redundancy Needs: Opt for TMR modules in applications where single-channel failure risks are high.
Precautions
- Installation: Install in front slots only to avoid signal interference with rear-mounted modules.
- Calibration: Regularly verify sensor alignment and signal integrity to maintain accuracy.
- Firmware Updates: Apply Bently-recommended updates to access new features and security patches.
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Bently Nevada 3500/50M Tachometer Module
Manufacturer: Bently Nevada
Product Number: 3500/50M
Category: Dual-Channel Tachometer Module
Number of Channels: 2
Input Types: Proximity probes, magnetic pickups
Measurement: Shaft speed, acceleration, direction
Frequency Range: 1 to 60,000 RPM
Accuracy: ±0.01%
Product Description
The Bently Nevada 3500/50M is a dual-channel tachometer module designed for precise shaft speed, acceleration, and direction monitoring in rotating machinery. As part of the 3500 Monitoring System, it accepts inputs from proximity probes or magnetic pickups, delivering real-time data for predictive maintenance in critical applications. With configurable alarm setpoints and a built-in keyphasor signal generator, the 3500/50M eliminates the need for a separate keyphasor module, reducing system complexity. Its hot-swap capability and rugged design make it suitable for power plants, oil refineries, and industrial machinery.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 3500/50M |
| Function | Tachometer Module |
| Channels | 2 (Dual-channel) |
| Input Signals | Proximity probes (0–20 VDC) or magnetic pickups |
| Output | Digital speed/acceleration signals, keyphasor |
| Power Supply | 24 VDC ±10% (from 3500 Series rack) |
| Mounting | 3500 Series rack (front slot) |
| Dimensions | 263 mm × 58 mm × 28 mm (W × H × D) |
| Weight | 4.3 kg |
| Operating Temperature | -40°C to +70°C |
Advantages and Features
- Dual-Channel Redundancy: Simultaneously monitors two shafts or redundant paths for critical systems.
- Integrated Keyphasor: Generates conditioned keyphasor signals for phase analysis, reducing hardware costs.
- Flexible Alarming: Supports speed, acceleration, and reverse rotation alarms with user-programmable setpoints.
- Peak Hold Function: Stores maximum speed, reverse speed, or reverse rotation count for post-event analysis.
- Hot-Swap Design: Enables module replacement without system shutdown, minimizing downtime.
Application Areas and Use Cases
Industry Applications:
- Power Generation: Steam and gas turbines.
- Oil & Gas: Compressors and pumps in offshore platforms.
- Manufacturing: High-speed production lines and conveyor systems.
Case Study: A North American petrochemical plant reduced compressor failures by 30% using the 3500/50M to detect sudden speed fluctuations. Early intervention through alarm notifications saved $800,000 in repair costs.
Competitor Comparison
- Higher Integration: Combines tachometer and keyphasor functions in one module, unlike standalone alternatives.
- Extended Redundancy: Supports triple modular redundancy (TMR) configurations for safety-critical systems.
- Wider Temperature Range: Operates reliably in extreme conditions compared to some competitors.
Selection Recommendations
- System Compatibility: Ensure compatibility with 3500 Series racks and 3500/42M monitors.
- Input Type: Choose proximity probes for non-contact measurements or magnetic pickups for cost-effective solutions.
- Redundancy Needs: Opt for TMR modules in applications where single-channel failure risks are high.
Precautions
- Installation: Install in front slots only to avoid signal interference with rear-mounted modules.
- Calibration: Regularly verify sensor alignment and signal integrity to maintain accuracy.
- Firmware Updates: Apply Bently-recommended updates to access new features and security patches.
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