BENTLY 3500/20

Description

Detailed parameter table

BENTLY 3500/20

Product introduction

The 3500/20 from Bently Nevada is a high-reliability power supply module, serving as the critical energy source for the 3500 machinery protection system—the industry-leading platform for monitoring critical rotating equipment. As the backbone of the 3500 series ecosystem, the 3500/20 delivers stable, multi-voltage power to monitoring modules like vibration monitors, speed sensors, and communication interfaces, ensuring uninterrupted operation of machinery protection systems.

Engineered for industrial environments, the 3500/20 provides multiple regulated output voltages (5V DC, ±15V DC, 24V DC) to support diverse components within the 3500 system architecture. Its robust design and redundancy capabilities make it ideal for safety-critical applications where power interruptions could compromise equipment protection. Whether deployed in power plants, refineries, or manufacturing facilities, the 3500/20 ensures that critical monitoring systems remain operational, safeguarding high-value rotating machinery from unexpected failures.

Core advantages and technical highlights

Comprehensive power delivery: The 3500/20 offers multiple regulated output voltages to support the entire 3500 series ecosystem, eliminating the need for external power supplies. Its 5V DC output powers digital logic components, ±15V DC supports analog circuitry in measurement modules, and 24V DC provides power for sensors and relays. This integrated approach simplifies system design while ensuring voltage compatibility across all connected components.

Redundant operation capability: Designed for mission-critical applications, the 3500/20 supports N+1 redundancy, allowing multiple modules to operate in parallel with automatic failover. If a primary power supply fails, the redundant unit seamlessly takes over without interrupting system operation. This capability is essential for safety-critical installations where power continuity is vital to maintaining machinery protection.

Advanced protection features: The 3500/20 incorporates comprehensive protection mechanisms, including overvoltage, overcurrent, short circuit, and thermal shutdown safeguards. These features prevent damage to both the power supply and connected equipment during electrical anomalies, such as voltage spikes or load faults. The module’s fault detection circuitry also provides diagnostic information to facilitate quick troubleshooting and minimize downtime.

Typical application scenarios

In combined cycle power plants, the 3500/20 serves as the power source for turbine monitoring systems, delivering stable power to vibration sensors, speed monitors, and trip logic modules. Operating in redundant pairs, the 3500/20 units ensure continuous power to critical protection systems monitoring gas and steam turbines, even during electrical transients common in power generation environments. Its wide input voltage range accommodates fluctuations in plant power supplies, maintaining consistent operation of machinery protection systems.

Within offshore oil and gas platforms, the 3500/20 powers compressor monitoring systems in harsh marine environments. Mounted in climate-controlled control cabinets, it provides reliable power to proximity probes, vibration analyzers, and emergency shutdown interfaces monitoring centrifugal compressors. The module’s robust protection features withstand voltage fluctuations from platform power systems, ensuring uninterrupted operation of systems that prevent catastrophic compressor failures.

In chemical processing facilities, the 3500/20 supplies power to machinery protection systems monitoring pumps, agitators, and gearboxes throughout the production process. Its ability to operate in high-temperature environments (-40°C to 70°C) makes it suitable for installation near process equipment, while its compliance with industrial safety standards ensures compatibility with hazardous area installations when properly configured. The 3500/20’s stable output ensures accurate sensor measurements, critical for maintaining process integrity and equipment safety.

BENTLY 3500/20

Related model recommendations

3500/20-01-00: A variant of the 3500/20 with enhanced surge protection, ideal for areas with frequent power transients.

3500/15: A speed monitoring module powered by the 3500/20 in turbine and compressor protection systems.

3500/42-01-00: A vibration monitor module that relies on the 3500/20 for both logic and sensor power.

3500/92-01-00: A communication gateway module powered by the 3500/20 to enable data transmission to plant control systems.

133292-01: A sensor junction box that receives 24V DC power from the 3500/20 to operate connected proximity probes.

3500/22-01-00: An operator display module powered by the 3500/20 for local monitoring of machinery health parameters.

3500/05-01-00: A rack interface module that coordinates power distribution from the 3500/20 to other 3500 series modules.

Installation, commissioning and maintenance instructions

Installation preparation: Before installing the 3500/20, verify that the 3500 series rack is properly grounded and mounted in a clean, dry enclosure with adequate ventilation. Ensure the input power supply matches the module’s specifications (100-240V AC or 18-32V DC) and is properly fused. For redundant configurations, install power supply modules in adjacent rack slots and connect them to separate input power sources for maximum reliability. During installation, align the module with rack guides and ensure secure engagement with the backplane connector.

Maintenance suggestions: Inspect the 3500/20 quarterly to verify proper operation of LED indicators—steady green lights indicate normal operation, while amber or red lights signal faults. Clean dust from ventilation slots using compressed air to maintain thermal performance. In redundant configurations, test failover functionality annually by temporarily disconnecting the primary module and verifying uninterrupted system operation. Monitor input voltage levels regularly to ensure they remain within specified ranges. If a fault occurs, use the module’s diagnostic indicators to isolate issues, and replace faulty units promptly to restore redundancy.

Service and guarantee commitment

The 3500/20 is backed by a 3-year warranty covering defects in materials and workmanship under normal operating conditions. Bently Nevada’s global technical support team provides 24/7 assistance for installation, configuration, and troubleshooting of power supply systems, with specialized expertise in redundant power configurations.

We offer comprehensive training on the 3500/20, covering installation, redundancy setup, and maintenance procedures to ensure optimal performance. For critical applications, our field service engineers can perform on-site commissioning and redundancy testing to validate system reliability. Backed by Bently Nevada’s decades of experience in industrial power systems, the 3500/20 delivers the reliable power delivery you need to protect your critical machinery investments.