Product Overview
The 3500/22M 146031-01 is a high-performance multi-channel vibration monitoring module, central to Bently Nevada’s 3500 Machinery Protection System. Designed to safeguard critical rotating equipment, this module excels at capturing real-time data on vibration, shaft position, and radial movement—parameters vital for identifying early signs of machinery issues such as rotor imbalance, bearing wear, or misalignment.
As a key component of the 3500 series, the 3500/22M 146031-01 integrates seamlessly with the system’s chassis and complementary modules like the 3500/20 interface, ensuring critical data flows to control rooms and DCS platforms. Its ability to monitor up to four proximity probes simultaneously provides a comprehensive view of machinery health, making it indispensable for predictive maintenance strategies. What sets the 3500/22M 146031-01 apart is its reliability in harsh industrial environments—resistant to temperature fluctuations, electrical noise, and dust—ensuring consistent performance where downtime is costly and equipment failure is catastrophic. Whether in a power plant turbine hall or an offshore refinery, the 3500/22M 146031-01 acts as a frontline defender of operational integrity.
Technical Specifications
| Parameter |
Value |
| Product Model |
3500/22M 146031-01 |
| Manufacturer |
Bently Nevada |
| Product Type |
Multi-Channel Vibration Monitor Module (3500 System) |
| Input Channels |
4 (proximity probe inputs) |
| Frequency Response |
0.1 Hz to 10,000 Hz |
| Output Signals |
4-20 mA analog, digital relay outputs (alert/trip) |
| Operating Temperature |
-5°C to 65°C (23°F to 149°F) |
| Dimensions |
152 mm x 102 mm x 229 mm (H x W x D) |
| Mounting Type |
Rack-mounted in 3500 System Chassis |
| Compatibility |
3500/05 Power Supply, 3500/20 Interface Module, 3301 Series Probes |
| Diagnostic Features |
Sensor fault detection, self-test, communication error logging |
| Protection Rating |
IP20 (dust-resistant, chassis-mounted) |
| Certifications |
CE, UL 508, ATEX II 3G Ex nA IIC T4 Gc |

Key Features and Benefits
The 3500/22M 146031-01 distinguishes itself with its multi-channel design, monitoring up to four proximity probes at once to deliver a holistic view of machinery health. This capability allows it to detect a wide range of anomalies, from slow-developing bearing degradation to sudden rotor imbalance, thanks to its broad frequency response that captures both low-speed shaft movement and high-frequency vibration.
Its advanced diagnostic suite is another standout feature. The 3500/22M 146031-01 continuously checks for sensor faults—such as broken cables or misaligned probes—and logs communication errors, minimizing false alarms and ensuring operators trust the data. When thresholds are exceeded, its relay outputs trigger immediate alerts or safety shutdowns, preventing costly equipment damage.
Seamless integration with the 3500 chassis and
3500/20 interface module simplifies setup, allowing it to 融入 existing systems without extensive reconfiguration. Built to withstand harsh industrial conditions, including temperature swings and electrical noise, the
3500/22M 146031-01 ensures reliable performance in environments like refineries and power plants, where consistency is critical.

Application Scenarios
The 3500/22M 146031-01 is a workhorse in industries reliant on rotating machinery. In power generation, it monitors steam and gas turbines, tracking vibration to detect imbalances that could lead to catastrophic failure during peak demand. By alerting operators to subtle changes in shaft movement, it enables scheduled maintenance, avoiding unplanned outages that disrupt electricity supply.
In oil and gas operations, the 3500/22M 146031-01 safeguards centrifugal compressors, which operate under extreme pressure. It detects vibration caused by worn seals or misaligned rotors, preventing leaks that could release hydrocarbons and halt production. Its ATEX certification makes it ideal for hazardous areas, such as offshore drilling rigs, where explosive atmospheres require robust, safe monitoring.
Chemical processing plants rely on the 3500/22M 146031-01 to monitor agitators and pumps. For example, in a pharmaceutical production facility, it tracks mixer shaft vibration to ensure uniform blending, protecting product quality, and preventing motor damage from excessive movement.
Related Models
3500/22M 146031-02 – 8-channel variant, suitable for larger machinery with more monitoring points.
3500/22M 146030-01 – Previous generation model with a narrower frequency range (1 Hz to 5,000 Hz).
3500/05 – Power supply module that provides stable power to the 3500/22M 146031-01 in the 3500 chassis.
3500/20 – Interface module that transmits data from the 3500/22M 146031-01 to DCS/SCADA systems.
330101-00-25-20-12-05 – Proximity probe optimized for use with the 3500/22M 146031-01.
3500/33 – Relay module that expands the 3500/22M 146031-01’s output capabilities for complex safety sequences.
3500/92 – 3500 chassis backplane, essential for mounting and connecting the 3500/22M 146031-01.
Installation and Maintenance
Installation of the 3500/22M 146031-01 requires mounting it in an available slot within the 3500 chassis, ensuring a secure connection to the backplane for power and communication. Proximity probes must be wired to the module’s input terminals using shielded cables, routed away from high-voltage lines to avoid electromagnetic interference. Proper grounding of both the module and probes is critical to maintain measurement accuracy, and the chassis should be installed in a dry, dust-free area with adequate ventilation to keep temperatures within the -5°C to 65°C range.
For maintenance, inspect the 3500/22M 146031-01 quarterly: check terminal connections for tightness, clean probe inputs to remove debris, and verify relay functionality. Annual calibration using Bently Nevada-approved tools ensures measurement precision. Cables should be inspected for wear or kinks, with replacements made promptly to prevent signal loss. The module’s self-test feature should be run monthly to confirm it detects faults correctly, ensuring reliability in critical operations.
Product Warranty
The 3500/22M 146031-01 is backed by a one-year warranty from Xiamen Xiongba E-commerce Co., Ltd., covering manufacturing defects and offering free replacement of faulty units. This warranty reflects our confidence in the product’s quality, built on Bently Nevada’s reputation for durable industrial components. Our global support team provides timely assistance with installation, calibration, and troubleshooting, ensuring minimal downtime for your 3500 system. We stand behind the 3500/22M 146031-01, committed to keeping your machinery protection systems reliable and effective.
Company Introduction
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. We offer a one-year warranty and free replacement service.