Product Overview
The 3500/94M 184826-01 is a high-performance speed and position monitor module within Bently Nevada’s 3500 machinery protection system, engineered to deliver precise, real-time tracking of rotating machinery parameters critical to operational safety and efficiency. As a specialized component, it focuses on measuring shaft speed, direction, and positional data—such as axial thrust or rotor position—translating these into actionable insights for maintenance and control systems.
Integral to the 3500 series ecosystem, 3500/94M 184826-01 acts as a bridge between machinery sensors (like proximity probes and magnetic pickups) and the broader monitoring network, ensuring accurate data capture even in high-vibration industrial environments. What sets 3500/94M 184826-01 apart is its ability to handle dynamic speed ranges and positional nuances, making it indispensable for machinery where overspeed, misalignment, or axial movement could lead to catastrophic failure. Its seamless integration with 3500 system software enhances scalability, allowing it to adapt to both small-scale and large industrial setups with equal reliability.
Technical Specifications
| Parameter |
Value |
| Product Model |
3500/94M 184826-01 |
| Manufacturer |
Bently Nevada |
| Product Type |
Speed and Position Monitor Module |
| Input Channels |
4 configurable channels (supports 2 speed, 2 position inputs) |
| Supported Sensors |
Proximity probes, magnetic pickups, optical encoders |
| Speed Measurement Range |
0.1 to 100,000 RPM |
| Position Measurement Accuracy |
±0.05% full scale |
| Communication Protocol |
RS-485 (Modbus RTU) |
| Power Requirements |
24 VDC ±10% |
| Operating Temperature |
-5°C to 65°C (23°F to 149°F) |
| Dimensions |
162 mm x 104 mm x 30 mm (6.4 in x 4.1 in x 1.2 in) |
| Mounting Type |
Rack-mounted in 3500 system chassis |
| Alarm Capabilities |
Configurable overspeed/underspeed, position deviation alerts |
| Certification |
CE, UL, IEC 61508 (SIL 2 compliant) |
Key Features and Benefits
The 3500/94M 184826-01 excels in dynamic measurement accuracy, even at extreme speeds, ensuring that subtle changes in rotor behavior—such as speed fluctuations or axial drift—are captured with precision. This capability is critical for early detection of issues like bearing wear or coupling misalignment, which can escalate into major failures if unaddressed.
Its multi-channel design allows simultaneous monitoring of speed and position across different machinery components, reducing the need for multiple modules and simplifying system architecture. Integration with Bently Nevada’s 3500 software suite enables intuitive configuration of alarm thresholds, real-time data visualization, and historical trend analysis—empowering operators to set proactive maintenance schedules.
Durability is a hallmark of 3500/94M 184826-01. Built to withstand industrial environments with high electromagnetic interference, vibration, and temperature swings, it maintains consistent performance in settings like power plant turbine halls or offshore oil rigs. The module’s self-diagnostic functions continuously validate sensor integrity and internal operations, flagging issues before they compromise data accuracy.
Application Scenarios
The 3500/94M 184826-01 is widely deployed in industries where precise speed and position control of rotating machinery is non-negotiable. In power generation, it monitors steam and gas turbines, tracking rotor speed to prevent overspeed events during load rejection—critical for avoiding turbine damage and ensuring grid stability. It also measures axial thrust in generators, alerting teams to potential bearing overload before failure occurs.
In oil and gas production, 3500/94M 184826-01 is essential for centrifugal compressor monitoring, tracking impeller speed and shaft position to detect issues like surge or seal degradation. On offshore platforms, it ensures gas lift pumps maintain optimal rotational speeds, preventing cavitation and extending equipment life.
Chemical processing facilities rely on the module to monitor agitator and mixer speeds, ensuring consistent blending and preventing motor overspeed that could disrupt batch quality. In metal processing plants, it tracks rolling mill motor speeds and roll position, maintaining precise material thickness and reducing waste.
Related Models
3500/94 184826-01 – Base model without the "M" feature set, offering basic speed monitoring as a predecessor to 3500/94M 184826-01.
3500/94M 184826-02 – Enhanced variant with 6 input channels, suitable for systems requiring more monitoring points than 3500/94M 184826-01.
3500/50 133442-01 – Machinery protection monitor that integrates speed and position data from 3500/94M 184826-01 with vibration metrics.
3500/22 133438-01 – Power supply module providing stable 24VDC to 3500/94M 184826-01 and other 3500 components.
3500/65 145988-02 02D – Communication module that transmits 3500/94M 184826-01 data to DCS or SCADA systems.
3500/42 133440-01 – Vibration monitor often paired with 3500/94M 184826-01 for comprehensive machinery health tracking.
3500/94M 184826-03 – Explosion-proof variant certified for hazardous areas, expanding the application range of 3500/94M 184826-01.
Installation and Maintenance
Installation of 3500/94M 184826-01 requires a 3500 system chassis with an available slot, ensuring secure mounting to prevent vibration-induced loosening. Prior to installation, verify the environment meets the module’s operating temperature and humidity ranges, with adequate ventilation to avoid heat buildup. Proper grounding is critical—connect the chassis to a dedicated industrial ground to minimize electrical noise that could distort speed or position signals. Route sensor wiring separately from high-voltage cables and use shielded cables for proximity probes to maintain signal integrity.
For maintenance, inspect
3500/94M 184826-01 quarterly to check for loose connections or dust accumulation, which can impede heat dissipation. Calibrate speed and position inputs semi-annually using Bently Nevada’s calibration tools to ensure measurement accuracy, especially after sensor replacement. Utilize the module’s self-test function during scheduled shutdowns to validate alarm outputs and diagnostic capabilities. Update firmware annually via the 3500 software suite to access the latest performance enhancements and compatibility improvements.
Product Warranty
The 3500/94M 184826-01 is backed by a one-year warranty from Xiamen Xiongba E-commerce Co., Ltd., covering defects in materials and workmanship under normal operating conditions. This warranty includes free replacement service for any module found to be faulty within the coverage period, reflecting our confidence in its reliability. Our global support team is available to assist with installation guidance, troubleshooting, and technical inquiries, ensuring seamless integration and minimal downtime for your operations. We are committed to customer satisfaction, leveraging our expertise in industrial automation to deliver responsive service for 3500/94M 184826-01 and all related products.
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.
