Description
1. Product Description
2. Product Parameters
| Parameter | Specification |
|---|---|
| Model Number | Bently 149986-02 |
| Type | 4-Channel Relay Control Module (3500 Series) |
| Input Voltage | 24 VDC ±10% |
| Relay Outputs | 4 Form-C (SPDT) relays, 5A/250V AC |
| Communication Interfaces | Ethernet/IP, Modbus TCP, PROFIBUS DP |
| Measurement Channels | 4 analog inputs (0–20 mA or ±10 V) |
| Resolution | 16-bit ADC |
| Operating Temperature | -40°C to +85°C (-40°F to +185°F) |
| Dimensions | 100 mm (W) x 150 mm (H) x 50 mm (D) |
| Weight | 0.7 kg |
| Compatibility | Bently 3500 Series monitoring systems |
| Certifications | CE, RoHS, and IP65-rated for dust/water resistance |
| MTBF | >100,000 hours under normal conditions |

Bently 149986-02
3. Advantages and Features
- Wide Protocol Support: Native compatibility with multiple industrial communication standards simplifies integration into multi-vendor systems.
- High Reliability: IP65-rated enclosure and EMI shielding protect against environmental hazards.
- User-Friendly Configuration: Intuitive software interface allows quick setup and customization of alarm parameters.
- Energy Efficiency: Low-power design consumes <10W during operation, contributing to sustainable industrial practices.
4. Application Areas and Use Cases
- Turbine Vibration Analysis: Detecting imbalance or misalignment in power plant turbines.
- Compressor Health Monitoring: Ensuring optimal performance in petrochemical facilities.
- Motor Control Centers: Managing multiple motors in industrial production lines.
5. Competitive Comparison
When compared to similar industrial relay modules, the Bently 149986-02 offers superior temperature tolerance (-40°C to +85°C) and higher MTBF than most alternatives. Its 4-channel design and programmable logic capabilities provide greater flexibility than single-channel modules, while its native compatibility with Bently’s 3500 Series ecosystem eliminates the need for additional converters or adapters. Unlike some competitors, the Bently 149986-02 includes built-in diagnostics for rapid fault isolation, reducing troubleshooting time by 40%.

Bently 149986-02
6. Selection Recommendations
- System Compatibility: Ensure it aligns with your existing Bently 3500 Series framework or PLC system.
- Environmental Requirements: Verify the operating temperature and IP rating match your facility’s conditions.
- Redundancy Needs: Leverage its dual-channel redundancy for mission-critical applications.
- Budget: Balance the initial investment with long-term savings from reduced maintenance and energy costs.
7. Precautions
- Installation: Power down the system before installing or replacing the module to prevent ESD damage.
- Cabling: Use shielded cables and proper grounding to minimize EMI interference.
- Calibration: Perform annual calibration using Bently-certified tools to maintain measurement accuracy.
- Firmware Updates: Regularly update firmware to access new features and security patches.
- Storage: Store the module in a dry, temperature-controlled environment (20°C ±5°C) to prevent corrosion.
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