I. Basic Information
Full Model：3500/15 114M5335-01
Brand & Origin：Bently Nevada (USA)
Product Positioning
As a dedicated Low Voltage DC Power Input Module (PIM) for Bently 3500 machinery protection monitoring systems, it serves as the core power unit of the entire 3500 rack monitoring system, designed for the condition monitoring systems of key rotating equipment such as steam turbines, centrifugal compressors, gas turbines, large fans and industrial pump sets. It mainly converts external low-voltage DC power into multiple stable internal operating voltages for the rack, providing continuous, pure and disturbance-free power supply for all monitoring cards, communication modules and frame interface units in the rack. It is a basic core component that ensures accurate monitoring data, stable system operation and reliable interlock logic of unit vibration, displacement, temperature and speed. It supports dual power redundant hot standby networking and non-stop online hot-swap replacement, widely used in new equipment complete set, old faulty module replacement, power supply system redundancy transformation and unit safety level upgrading.
Hardware Architecture
Adopting industrial isolated switching power supply architecture, it integrates EMI filtering unit, surge suppression circuit, wide voltage regulation core, multi-channel isolated output loop, load balancing unit and full-domain hardware self-diagnosis system. The board adopts military-grade multi-layer PCB wiring with complete separation of strong and weak currents, equipped with full-range hardware protections including input overvoltage, undervoltage, overcurrent, short circuit, overheating, surge and static electricity, which can effectively filter industrial grid clutter, voltage fluctuation and instantaneous pulse interference. It features independent load monitoring and circulation suppression mechanism, which can automatically balance load and eliminate circulation interference during dual power redundant parallel operation, ensuring pure and stable rack power supply throughout. Adopting pure solid-state circuit integrated design without mechanical moving parts or consumables, it features low heat generation and high efficiency, adapting to 7×24-hour uninterrupted industrial continuous operation with zero voltage drift and no performance attenuation for long-term operation.
Mounting Specification
It adopts embedded installation in dedicated slots of standard 3500 series 19-inch racks, perfectly matching the backplane power bus contacts, fixed structure and locking buckles of 3500 racks, with convenient disassembly and stable insertion. It supports hot-swap online replacement, and the insertion and removal of a single module will not affect the normal operation of other equipment in the entire rack. It is arranged in the dedicated left power slot of the rack, supporting two installation modes of single power independent operation and dual power redundant backup to meet different unit safety power supply configuration requirements. The front panel is equipped with multi-function status indicator lights to intuitively display power-on, normal output, load operation, fault alarm and overheating protection status, supporting rapid on-site inspection, status verification and accurate fault location, fully complying with Bently original installation and operation and maintenance specifications.
Compatible Systems
Natively and exclusively compatible with the full range of Bently 3500 machinery protection monitoring systems, it can supply standard operating power for all 3500 series monitoring cards, communication modules and frame interface modules. It supports two operating modes: single module independent power supply and dual module redundant hot standby power supply. When dual modules are connected in parallel, they automatically balance load and serve as mutual backups. In case of failure of one power supply, the other will switch seamlessly without power interruption, system shutdown or data loss. Adapted to industrial standard 20-30VDC low-voltage DC front-end power supply, it can seamlessly connect with industrial DC regulated power supply, UPS DC output and industrial control DC power supply system, adapting to various industrial power supply scenarios in electric power, petrochemical, coal chemical and metallurgical industries.
Product Characteristics
As an original industrial safety-grade power module, it has passed strict full-item tests including full-function aging, full-load pressure test, high and low temperature impact and EMC electromagnetic compatibility before delivery, with high conversion efficiency, stable output voltage and strong anti-interference ability. It has passed IEC 61508 SIL2 functional safety certification and API 670 industrial unit monitoring authoritative certification, meeting the stringent power supply standards for safety monitoring systems of major rotating equipment. It supports hot-swap maintenance, dual power redundant fault tolerance and automatic load balancing, with perfect fault self-diagnosis and protection locking functions. In case of abnormality, it will automatically cut off output, retain fault status and actively alarm, eliminating system downtime, monitoring failure and interlock misoperation caused by power abnormality. The maintenance-free solid-state design adapts to long-term continuous industrial operation, greatly reducing the risk of unplanned unit shutdown.
II. Technical Specifications
1. Electrical Input & Output Parameters
Input Voltage Range: Standard low-voltage DC input 20VDC～30VDC, adapted to industrial 24VDC conventional DC power supply system, resisting small grid fluctuations and instantaneous voltage disturbances. Input Characteristics: Built-in high-frequency EMI filtering and surge suppression circuit, which can filter industrial grid pulse interference and clutter noise, with strong input voltage adaptability and anti-disturbance performance. Output Specification: Multi-channel isolated regulated output, accurately matching the working voltage of all 3500 rack cards, with high output voltage accuracy and extremely low ripple, ensuring high-precision operation of monitoring cards throughout. Conversion Efficiency: Industrial high conversion efficiency design with low loss and low heat generation under full load conditions, stable performance without attenuation during long-term full-load operation. Load Capacity: Adapted to the full-load operation demand of full-slot racks, supporting synchronous full-load operation of multiple cards, with fast load response and no voltage drop.
2. Redundancy & Fault Tolerance Parameters
Operating Mode: Supports single power independent operation and dual power hot standby parallel operation. When dual modules are working, they automatically balance load and share the total rack load equally. Hot-Swap Feature: Supports live online plugging and replacement, with no power interruption, system restart or data loss during disassembly and assembly, without affecting normal unit monitoring and interlock logic. Fault Switching: When any redundant power module fails, loses power or is protected and locked, the other module takes over the full load seamlessly with zero delay and zero disturbance, ensuring uninterrupted system operation. Circulation Suppression: Built-in intelligent circulation suppression algorithm and hardware isolation circuit, no circulation or mutual interference during dual power parallel operation, eliminating abnormal parallel power supply faults.
3. Protection & Safety Parameters
Hardware Protection Mechanism: Integrated input overvoltage, undervoltage, overcurrent, short circuit, output overload and overheating automatic protection functions. In case of faults, it will automatically lock the output instantly to protect all rear-end monitoring cards and eliminate secondary equipment damage. Insulation Performance: Complete isolation of high and low voltage with high insulation and voltage resistance, eliminating system faults caused by electric leakage, voltage crosstalk and electrostatic impact. Safety Certification: Passed IEC 61508 SIL2 functional safety certification, API 670 industrial standard certification and EMC electromagnetic compatibility certification, fully complying with power supply specifications for safety monitoring systems of major units. Fault Self-Diagnosis: Real-timely monitors input voltage, output load, module temperature and operating status throughout the operation, actively alarms, locks faults and retains status information in case of abnormalities, facilitating fault traceability and operation and maintenance troubleshooting.
4. Environmental Operating Parameters
Operating Temperature：-30℃～+60℃, wide temperature adaptation to complex industrial cabinet high and low temperature working conditions, with no significant attenuation of conversion efficiency and output accuracy under high and low temperature environments.
Storage Temperature：-40℃～+85℃
Operating Humidity：5%~95% RH, non-condensing, resisting humid and water vapor-rich cabinet conditions without condensation short circuit or oxidation failure.
Vibration & Interference Resistance: Passed industrial vibration and impact tests, capable of long-term resistance to continuous unit equipment vibration and working condition disturbance; full-domain EMC electromagnetic compatibility design resists high-frequency electromagnetic interference from frequency converters and high-power equipment, with stable power supply and no fluctuation.
5. Mechanical Structure Parameters
Overall Dimension: 120.7mm×50.8mm×251.5mm (H×W×D), standard compact size for 3500 racks, adapted to dedicated left rack slots without occupying monitoring card slots.
Weight: Approx. 1.39kg, lightweight reinforced structure with no load pressure for rack installation, firm and anti-loosening by buckle locking.
Structural Material: Industrial flame-retardant high-strength PCB and metal reinforced frame, dust-proof, anti-corrosion, anti-deformation and high and low temperature resistant, adapting to long-term continuous industrial operation conditions.
III. Key Features
1. Pure Regulated Output to Ensure High-Precision Monitoring
Adopting isolated regulated power supply architecture and multi-stage EMI filtering design, the module can completely filter high-frequency clutter, voltage spikes and pulse interference in industrial DC power grids, outputting low-ripple and highly stable pure working voltage. It accurately meets the power supply requirements of all 3500 series vibration, displacement, temperature and speed monitoring cards, eliminating monitoring data drift, value jitter, signal disorder and false alarm caused by voltage fluctuation and power clutter. It ensures accurate unit condition monitoring data and reliable interlock logic at the power supply bottom layer, providing basic power guarantee for the safe and stable operation of major units.
2. Dual Power Redundant Hot Backup for Zero-Stop Fault Tolerance
It supports dual-module parallel hot standby working mode, with automatic load balancing and mutual backup of dual power supplies, no circulation interference and no power supply conflict throughout. When any power module fails, loses power, is protected and locked or disassembled for maintenance, the other module can instantly and seamlessly take over the full rack load. The switching process has no power interruption, system restart, monitoring failure or interlock misoperation. It thoroughly eliminates single-point failure hidden dangers of single power supply operation, greatly improving the overall fault tolerance and operational reliability of the 3500 monitoring system, fully meeting the stringent safety requirements of uninterrupted operation of key units in power plants and petrochemical industries.
3. Online Hot-Swap Maintenance for Efficient Operation
With original standard hot-swap function, faulty or aging power modules can be directly plugged and replaced online under the working condition of normal unit operation and uninterrupted system monitoring, without shutdown, power failure or withdrawal of system interlock protection logic. It completely avoids the cumbersome operation and production loss of shutdown, monitoring stop and interlock release required for traditional power module maintenance, greatly simplifying system operation and maintenance processes, shortening fault disposal time and reducing the risk of unplanned unit shutdown, adapting to the operation and maintenance needs of industrial continuous production.
4. Full-Range Hardware Protection for Harsh Conditions
Integrated multiple hardware protection mechanisms including overvoltage, undervoltage, overcurrent, short circuit, overload, overheating, surge and static electricity. Once any parameter is abnormal, it will automatically lock the output and start protection immediately, effectively eliminating secondary faults such as module burnout, rear-end card damage and system paralysis caused by abnormal grid and load faults. With industrial-grade environmental adaptability of wide temperature, wide humidity, vibration resistance and electromagnetic interference resistance, it can long-term withstand harsh working conditions such as closed high temperature, low temperature, humidity, dust, continuous vibration and complex electromagnetic interference of industrial cabinets, with extremely strong operational stability.
5. Safety-Level Maintenance-Free Long-Term Operation
Adopting pure solid-state circuit integrated architecture without mechanical moving parts or loss consumables, it features low power consumption, low heat generation, zero long-term parameter drift and no performance attenuation. With SIL2 functional safety and API 670 industry authoritative certification, its power supply logic and protection mechanism fully comply with major unit safety standards. It is perfectly matched with standard 3500 rack slots, requiring no cabinet transformation, rewiring or complex debugging. It can directly replace old faulty power modules with unstable power supply, frequent alarms and performance attenuation, and can be stably put into operation after installation, greatly reducing system operation and maintenance costs and potential safety hazards.
IV. Working Principle
As the core power input unit of the 3500 unit monitoring system, the BENTLY 3500/15 114M5335-01 low-voltage DC power module is mainly responsible for filtering, regulating, isolating, multi-converting and stably outputting external low-voltage DC power, providing uninterrupted and highly reliable working power for the entire rack monitoring equipment. Installed in the dedicated left power slot of the 3500 rack, it supplies power to all rack cards through the backplane dedicated power bus.
After the module is powered on, the external 20-30VDC low-voltage DC input power first enters the front-end EMI filtering and surge suppression unit to filter grid clutter, voltage spikes and instantaneous interference signals. After high-precision voltage conversion and stable conditioning by the isolated voltage regulation core, it outputs multiple channels of isolated pure regulated power, which are respectively supplied to the rack frame interface module, various monitoring cards and communication display modules to ensure the normal startup and stable operation of all hardware units.
In single-module working mode, it independently bears the full rack load and real-timely monitors input voltage, output current, module temperature and load status throughout the operation, triggering protection locking and fault alarms immediately in case of abnormalities. In dual-module redundant parallel working mode, it automatically balances load through intelligent load balancing and circulation suppression mechanism, with dual modules serving as hot backups for each other. When one module fails and goes offline, the normal module instantly and seamlessly takes over the full load, ensuring no power interruption, system downtime or data loss throughout the process, retaining fault records and ensuring the continuous, stable and safe operation of the entire monitoring system.
V. Application Scenarios
1. Power Supply for Major Rotating Unit Monitoring Systems: Suitable for 3500 monitoring racks of key dynamic equipment such as steam turbines, centrifugal compressors, gas turbines, large fans and feed water pumps in thermal power, petrochemical, coal chemical and metallurgical industries, providing stable and reliable basic power supply guarantee for unit vibration, displacement, temperature and speed safety monitoring systems.
2. System Redundant Power Supply Transformation and Upgrading: Used for the transformation of old single-power 3500 racks, adding dual-power redundant hot standby architecture, eliminating single-point power supply failure hidden dangers, improving the overall safety level and fault tolerance of unit monitoring systems, and meeting the requirements of high-reliability continuous production.
3. In-Situ Replacement of Faulty Modules: In-situ replacement of old 3500/15 low-voltage DC power modules with unstable power supply, voltage drift, frequent alarms, overheating protection and reduced load capacity, quickly restoring system power supply stability without transforming racks and wiring.
4. Complete Set Deployment of New Equipment: As a standard supporting power unit for new 3500 racks, adapted to the complete installation, commissioning and operation of new unit monitoring systems, ensuring standardized power supply and stable operation of new equipment systems in line with industry safety standards.
5. Uninterrupted Operation and Maintenance Guarantee Scenarios: Adapted to unattended unit and continuous production device monitoring systems, realizing long-term uninterrupted system operation and non-stop operation and maintenance relying on hot-swap, redundant fault tolerance and maintenance-free features, reducing production shutdown losses.
