Description
Detailed parameter table
| Parameter name | Parameter value |
| Product model | 3500/25 149369-01 |
| Manufacturer | BENTLY NEVADA |
| Product category | Keyphasor monitor module |
| Electrical performance | 24V DC power supply; 2-channel input (Keyphasor signals); 4-20mA output per channel; Power consumption: 5W max |
| Physical size | Width: 24.4mm, Height: 241.3mm, Depth: 242mm |
| Interface type | BNC connectors for Keyphasor sensor inputs; Terminal blocks for power and analog outputs; Backplane connector for system communication |
| Communication protocol | Integrates with 3500 series system bus; Supports analog output for DCS/SCADA integration |
| Environmental requirements | Operating temperature: -40°C to +70°C; Humidity: 5% – 95%, non-condensing; Vibration resistance: 10g peak (10-2000Hz) |
| Installation method | Rack-mountable in 3500 series racks; Occupies 1 standard slot |
| Performance indicators | Frequency range: 1Hz – 20kHz; Accuracy: ±0.02% of reading; Resolution: 16-bit; Phase measurement accuracy: ±0.2 degrees |
BENTLY 3500/25 149369-01
Product introduction
The BENTLY NEVADA 3500/25 149369-01 is a compact 2-channel Keyphasor monitor module, a versatile component within the 3500 series machinery protection system. It is specifically designed to track the rotational position and speed of rotating machinery, serving as a reliable reference for synchronizing vibration and position measurements in various industrial monitoring applications.
This module processes signals from Keyphasor sensors, which are typically proximity transducers mounted to detect a notch or keyway on a rotating shaft. It converts these signals into accurate measurements of shaft speed, phase angle, and rotational position. The 3500/25 149369-01 delivers standardized 4-20mA outputs for each channel, enabling seamless integration with control systems and other 3500 series modules, such as the 3500/33 149986-01 vibration monitor. In automation setups, it acts as a precise timing reference, ensuring that vibration and position data are correlated to specific points in the machinery’s rotation, which is essential for accurate diagnostics of issues like imbalance, misalignment, and shaft cracks.
As a 2-channel variant, it offers a cost-effective solution for applications where monitoring of fewer rotating components is required, while still maintaining the core functionality of the 3500/25 series.
Core advantages and technical highlights
Compact and cost-effective: With 2 independent channels, the 3500/25 149369-01 is ideal for monitoring a smaller number of rotating components, such as a single turbine or pump. Its compact design and reduced channel count make it a more economical choice compared to higher-channel modules like the 3500/25-01-01-00 when full 4-channel capacity is not needed. This makes it suitable for small to medium-sized industrial setups or as a supplementary module in larger systems.
Reliable speed and phase measurement: The module offers excellent accuracy in speed and phase measurements, with a frequency range of 1Hz to 20kHz and phase measurement accuracy of ±0.2 degrees. This level of precision is sufficient for most standard industrial applications, allowing for the detection of rotational anomalies such as speed fluctuations and phase shifts that may indicate early-stage mechanical issues.
Seamless integration with 3500 series: The 3500/25 149369-01 is fully compatible with other modules in the 3500 series, including vibration monitors and position monitors. It integrates smoothly with the system bus, enabling data sharing and synchronization with other components. This ensures that the module can be easily incorporated into existing 3500 series setups or used to build new monitoring systems.
Durable design for harsh environments: Built to withstand the rigors of industrial environments, the module operates reliably in temperatures from -40°C to +70°C and resists 10g peak vibrations. Its robust construction ensures consistent performance in dusty, humid, or vibration-prone settings, such as manufacturing plants, refineries, and power generation facilities.
Typical application scenarios
In small-scale power generation facilities, such as biomass or solar thermal plants, the 3500/25 149369-01 monitors the rotational speed and position of small to medium-sized turbines or generators. By providing a precise Keyphasor reference, it enables the 3500/33 149986-01 vibration monitor to perform order analysis, helping detect issues like rotor imbalance or bearing wear. This allows for timely maintenance and ensures the reliable operation of the power generation equipment.
Within water treatment plants, the module is used to monitor the rotational speed of pumps and agitators. It tracks speed fluctuations that could indicate pump cavitation or mechanical wear, providing real-time data to the plant’s SCADA system via its 4-20mA outputs. This helps operators optimize pump performance, reduce energy consumption, and prevent equipment failures that could disrupt the water treatment process.
In food and beverage processing facilities, the 3500/25 149369-01 monitors the rotational speed of mixers, conveyors, and other processing equipment. It ensures that these machines operate at the correct speed, which is critical for maintaining product quality and consistency. By integrating with the facility’s control system, it triggers alerts when speed deviates from the desired range, allowing operators to make adjustments before quality issues arise.
BENTLY 3500/25 149369-01
Relationship with 3500/25-01-01-00
The 3500/25 149369-01 is a 2-channel variant of the 3500/25 series, while the 3500/25-01-01-00 is a 4-channel module. Both modules share the core functionality of tracking rotational position and speed, but the 3500/25 149369-01 is designed for applications requiring fewer monitoring channels.
The 3500/25-01-01-00 offers a wider frequency range (1Hz – 30kHz) and slightly higher accuracy (phase measurement accuracy of ±0.1 degrees) compared to the 3500/25 149369-01. This makes the 3500/25-01-01-00 more suitable for complex machinery systems or applications requiring higher precision, while the 3500/25 149369-01 is a cost-effective choice for simpler setups with fewer rotating components.
Both modules are fully compatible with other 3500 series components and can be used interchangeably in systems where the channel count and performance specifications meet the application requirements.
Related model recommendations
3500/25-01-01-00: The 4-channel variant of the Keyphasor monitor module, offering a wider frequency range and higher accuracy for more complex applications.
330103-00-05-10-02-00: A Keyphasor proximity transducer that pairs with the 3500/25 149369-01 to provide high-quality rotational position signals.
3500/33 149986-01: Vibration monitor module that uses Keyphasor data from the 3500/25 149369-01 for order analysis and synchronized vibration measurements.
3500/15 106M1079-01: Power supply module that provides stable 24V DC to the 3500/25 149369-01, ensuring consistent performance.
149992-01: Shielded BNC cable assembly for connecting Keyphasor sensors to the module, minimizing signal interference in noisy environments.
3500/55: Display and keypad module that allows local monitoring of speed and phase data from the 3500/25 149369-01.
3500/20: Rack interface module that facilitates communication between the 3500/25 149369-01 and other 3500 series components.
Installation, commissioning and maintenance instructions
Installation preparation: Before installing the 3500/25 149369-01, power off the 3500 rack and ensure proper grounding. Check that the installation environment meets temperature and humidity requirements. Required tools include a torque wrench (0.5-0.7Nm), Phillips screwdriver, and anti-static wrist strap. Inspect the module for damage and clean BNC connectors with isopropyl alcohol. Align with rack guides, insert until the backplane connector engages, and secure with mounting screws.
Commissioning: After installation, power on the rack and use BENTLY NEVADA configuration software to set up the module. Configure frequency ranges, phase references, and alarm thresholds for each channel based on machinery specifications. Calibrate using a reference signal generator to verify speed and phase accuracy. Test synchronization with connected modules like the 3500/33 149986-01 to ensure data correlation. Check LED indicators: a steady green “OK” light indicates normal operation, while status lights confirm signal detection on each channel.
Maintenance suggestions: Perform monthly visual inspections to check for loose connections, dust, or overheating. Clean the module with a dry, lint-free cloth. Calibrate annually using BENTLY NEVADA’s calibration kit to maintain ±0.02% accuracy. If signal loss occurs, check Keyphasor sensor alignment and cable integrity—replace damaged 149992-01 cables with genuine parts. For phase drift issues, verify sensor mounting stability and recheck calibration. Keep a maintenance log documenting calibrations, synchronization checks, and repairs to track performance.
Service and guarantee commitment
The 3500/25 149369-01 comes with a 12-month warranty covering manufacturing defects. During this period, we offer free repair or replacement for faulty units. Our technical support team provides 24/7 assistance for installation, configuration, and troubleshooting via phone, email, and online chat. We supply comprehensive documentation, including calibration procedures and synchronization guides with other 3500 series modules.
For critical applications, optional extended warranties (up to 3 years) are available, including on-site support and priority service. Backed by BENTLY NEVADA’s expertise in rotational machinery monitoring, the 3500/25 149369-01 is guaranteed to deliver reliable Keyphasor measurements, enhancing the diagnostic capabilities of your 3500 series system and ensuring optimal machinery performance.
