Product Overview
The BENTLY 128275-01 is a precision-engineered signal conditioning module, a key component of Bently Nevada’s 3500 Machinery Protection System, designed to refine and standardize raw sensor signals for accurate processing by monitoring modules. As an essential link between field sensors and control systems, this module takes unprocessed signals from proximity probes, accelerometers, and temperature sensors, filters noise, and converts them into stable, usable data for downstream components like the 3500/53 vibration monitor.
In automation setups, its role is critical: unconditioned signals can lead to inaccurate readings, false alarms, or missed faults in rotating machinery. The BENTLY 128275-01 stands out for its ability to maintain signal integrity even in electrically noisy environments, such as near high-voltage equipment in power plants. Whether integrated into a new 3500 system or retrofitted into an existing setup, the BENTLY 128275-01 ensures that machinery health data is both reliable and actionable, making it indispensable for predictive maintenance strategies.
Technical Specifications
| Parameter |
Value |
| Product Model |
BENTLY 128275-01 |
| Manufacturer |
Bently Nevada |
| Product Type |
Signal Conditioning Module (3500 Series) |
| Input Signals |
AC/DC signals from proximity probes, accelerometers |
| Output Signals |
4-20 mA DC, ±5 V DC (configurable) |
| Operating Voltage |
24V DC ±10% |
| Operating Temperature |
-25°C to 70°C (-13°F to 158°F) |
| Dimensions |
100mm x 160mm x 50mm (3.9" x 6.3" x 2.0") |
| Mounting Type |
3500 series rack slot mounting |
| Noise Filtering |
50/60 Hz notch filter, low-pass filtering (adjustable) |
| Compatibility |
3500/53, 3500/91, 3500/64M modules |
| Certifications |
ATEX, UL 61010, IECEx |
| Material |
Aluminum alloy (housing), stainless steel connectors |
| Weight |
0.5 kg (1.1 lbs) |
Key Features and Benefits
The BENTLY 128275-01 excels in signal purification, using advanced filtering algorithms to remove electromagnetic interference (EMI) and radio frequency interference (RFI) common in industrial settings. This ensures that raw sensor data—whether from turbine vibration probes or pump bearing temperature sensors—is converted into precise, consistent signals that monitoring modules can interpret without error.
Its configurable output options (4-20 mA or ±5 V) allow seamless integration with diverse 3500 series components, eliminating the need for additional adapters. The module’s built-in self-diagnostics continuously check for signal degradation or connection issues, alerting operators via the 3500 system software to potential problems before they affect data quality.
Constructed with durable materials, the BENTLY 128275-01 withstands exposure to industrial oils, coolants, and moderate vibration, ensuring long-term reliability in harsh environments like chemical processing plants or offshore platforms. Its compact design fits easily into 3500 racks, maximizing space efficiency in control cabinets.
Application Scenarios
The BENTLY 128275-01 is widely used in industries where accurate signal processing is critical to machinery protection. In natural gas power plants, it conditions signals from proximity probes monitoring steam turbine shafts, ensuring the 3500/53 module receives clean data to detect early signs of rotor imbalance—preventing costly turbine damage during peak operation.
In oil refineries, the BENTLY 128275-01 processes signals from accelerometers on centrifugal compressors, filtering out noise from nearby pumps to deliver precise vibration data to control systems. This allows operators to distinguish between normal operational vibration and potentially dangerous anomalies, such as impeller wear.
Within pulp and paper mills, the module conditions temperature sensor signals from dryer roller bearings, ensuring accurate readings even amid the electrical noise of high-power motors. Its reliability in humid environments makes it a staple in wastewater treatment plants, where it processes data from submersible pump vibration sensors to support predictive maintenance.
Related Models
128275-02 – High-temperature variant rated for -25°C to 100°C, ideal for turbine exhaust zones.
128274-01 – Previous generation signal conditioner with basic filtering, compatible with legacy 3500 setups.
3500/53 133396-01 – Vibration monitoring module that relies on
BENTLY 128275-01 for conditioned signals.
128275-03 – Explosion-proof version certified for Zone 0 hazardous areas, such as chemical storage facilities.
3500/91 161204-01 – Communication module that transmits data processed by
BENTLY 128275-01 to remote systems.
128276-01 – Dual-channel variant, processing signals from two sensors simultaneously for high-density setups.
Installation and Maintenance
Installing the BENTLY 128275-01 requires a vacant slot in the 3500 series rack, with at least 15mm of clearance on all sides for airflow. Ensure the rack is properly grounded to minimize electrical noise, and verify that input power matches the module’s 24V DC requirement. Connect sensor cables to the module’s stainless steel terminals, ensuring secure connections to prevent signal loss.
For maintenance, inspect the BENTLY 128275-01 quarterly to check for loose connections or corrosion on terminals. Calibrate the module annually using Bently Nevada’s calibration tools to maintain signal accuracy. Replace the module every 8-10 years, or if diagnostic tests show consistent signal degradation, to ensure reliable performance.
Product Warranty
The BENTLY 128275-01 is backed by a one-year warranty from Xiamen Xiongba E-commerce Co., Ltd., covering defects in materials and workmanship. During this period, we provide free replacement for any unit that fails under normal operating conditions, ensuring minimal disruption to your 3500 system. Our technical support team offers guidance on installation, calibration, and troubleshooting, leveraging extensive experience with Bently Nevada signal conditioning products. We stand behind the reliability of the BENTLY 128275-01, ensuring it meets the rigorous demands of industrial signal processing.
Company Introduction: We offer a one-year warranty and free replacement service：
Xiamen Xiongba E-commerce Co., Ltd. Branch specializes in the field of industrial automation, focusing on the sales of Distributed Control Systems (DCS), robot systems, and modules and spare parts for large-scale servo control systems. Our business covers a wide range of industrial automation products, including PLCs, MOTOROLA MVME industrial modules, Anybus communication converters, RTU remote modules, industrial PCs, low-frequency industrial displays, and SCSI human-machine interfaces. With over a decade of industry experience, Xiongba has grown into a global supplier of industrial automation spare parts. We source directly from overseas, offering products and parts from multiple countries and manufacturers. This helps solve customers' procurement challenges, ensures product quality, and provides a significant price advantage.
