The 106M1081-01 Universal AC Power Input Module (hereafter referred to as "Universal AC PIM") is an advanced front-end interface module designed specifically for the 3500/15 series power system. It is used in conjunction with the 3500/15 Universal AC Power Supply Module (part number 106M1079-01), together forming a complete "Universal AC Power Solution" adaptable to AC power grids worldwide.
Within the architecture of the 3500 rack, the power supply module and its corresponding Power Input Module (PIM) are strategically deployed in designated half-height slots on the left side of the rack. The power supply module is responsible for converting input power and distributing it to all monitoring, protection, and interface modules within the rack. The 106M1081-01 PIM, however, plays the critical role of a "gateway": it connects directly to the external AC power lines at the industrial site, receives the raw AC power, performs preliminary filtering, protection, and distribution, and then safely delivers it to the Universal AC Power Supply module behind it for final DC conversion.
Its designation as "Universal" stems from its exceptional wide-range voltage input capability, enabling seamless compatibility with a broad voltage range from 85V AC to 264V AC (RMS), covering the standard industrial voltages of the vast majority of countries and regions worldwide (e.g., 110V, 120V, 220V, 230V, 240V). This design simplifies spare parts inventory management, system deployment, and equipment relocation for globalized enterprises, eliminating the need to stock different PIM models for different voltage regions.
II. Application Scenarios and System Advantages
Building Redundant Power Architecture: This is one of the core values of the 106M1081-01 and its power supply module. In a single 3500 rack, users can install two identical sets of the Universal AC Power Solution (i.e., two 106M1079-01 power modules and two 106M1081-01 PIMs). According to the manual, the power supply/PIM combination in the lower slot defaults to the primary supply, and the one in the upper slot acts as the backup supply. Should the primary supply fail, be removed for maintenance, or lose its front-end input power, the backup supply will automatically and seamlessly take over, ensuring continuous power to the entire rack for zero-interruption operation. This is crucial for protection systems of critical machinery (e.g., large compressors, turbines, generator sets), where any monitoring interruption could lead to catastrophic failure.
Supporting Hot-Swap Maintenance: In a redundant configuration, any power supply module or PIM (including the 106M1081-01) can be hot-swapped (removed or inserted online) while the system remains powered and its monitoring functions uninterrupted. This simplifies preventive maintenance and fault replacement procedures, significantly enhancing system maintainability and availability.
Global Deployment and Simplified Supply Chain: Due to its voltage and frequency adaptability, systems utilizing the 106M1081-01 can be deployed anywhere in the world without needing to change power input components due to differing local grid standards. For multinational corporations, this means a globally unified part number, reducing the complexity and cost of spare parts inventory.
Future-Oriented Design: This module belongs to Bently Nevada's newer generation "Universal" series and is explicitly stated as not compatible with the traditional "High Voltage AC" or "Low Voltage AC" PIMs and power supply modules. This marks a technological iteration and standardization of the product line. Choosing the 106M1081-01 means the user is adopting the latest, most compatible technology platform with a longer future support cycle.
III. Compatibility and Upgrade Considerations
Please note: "The Universal AC Power Supply and PIM (Power Input Module) are not compatible with the Legacy 3500 AC Power Supply, High Voltage AC PIM and Low Voltage AC PIM."
Legacy vs. New: Users must clearly identify whether their existing system uses "Legacy" models or "Universal" models. The two differ in electrical design, connectors, and internal circuitry; they cannot be mixed, crossed, or installed interchangeably, as this may cause equipment damage or failure to operate.
Upgrade Path: If a user wishes to upgrade an existing system using Legacy AC power supplies to the Universal platform, they must simultaneously replace both the power supply module and the PIM with a new Universal set (106M1079-01 + 106M1081-01). Such an upgrade brings a wider input range, potentially higher efficiency, and better future support.
IV. Compliance and Certifications
As a critical industrial-grade component, the 106M1081-01 has obtained numerous international authoritative certifications, ensuring compliance with the safety, electromagnetic compatibility (EMC), and environmental standards of major global markets:
Electromagnetic Compatibility (EMC): Complies with the EU EMC Directive 2014/30/EU, meeting standards EN 61000–6–2 (Immunity for Industrial Environments) and EN 61000–6–4 (Emissions for Industrial Environments). This means it is insensitive to external electromagnetic interference while also strictly limiting the electromagnetic interference it generates during operation, preventing of surrounding sensitive equipment.
Electrical Safety: Complies with the EU Low Voltage Directive 2014/35/EU, meeting standard EN 61010–1. This is a fundamental safety requirement for industrial measurement and control equipment.
Restriction of Hazardous Substances (RoHS): Complies with the EU RoHS Directive 2011/65/EU, meaning the content of restricted hazardous substances (e.g., lead, mercury, cadmium) in the product is below specified thresholds, making it more environmentally friendly.
Maritime Certifications: Meets relevant rules from classification societies DNV GL and ABS (American Bureau of Shipping), suitable for maritime applications such as ships and offshore platforms.
Hazardous Area Approvals (Critical): When installed per specified drawings (149243 or 149244), this module has obtained certifications applicable to Class I, Zone 2 (gas atmospheres) and Class I, Division 2 (North American standard) hazardous areas. These specifically include:
ATEX/IECEx: Ex nA nC ic IIC T4 Gc and Ex ec nC ic IIC T4 Gc.
North American NRTL: Class I, Zone 2: AEx/Ex nA nC ic IIC T4 Gc, etc.; Class I, Division 2, Groups A, B, C, D; T4 Temperature Class (ambient temperature Ta range -20°C to +65°C).
These approvals enable its safe application in industries such as Oil & Gas, Chemical, and Pharmaceutical where potentially explosive atmospheres may exist, serving as for industrial safety.
V. Ordering, Maintenance, and Accessories
Ordering Information: When ordering a complete 3500/15 Power Supply Module (model format 3500/15-AA-BB-CC), selecting type "05" for the top slot (A) or bottom slot (B) signifies Universal AC Voltage, and the system will include or require the 106M1081-01 PIM. The specific configuration depends on whether the user needs a single supply or redundant supplies.
Critical Spare Parts:
Fuse: This module uses a specific fast-blow fuse, part number 120M3877, rated at 5A/500V AC, size 6.3 x 32 mm. The fuse is the core protection component and should be stocked as a critical spare.
Connector: A dedicated replacement connector is available, part number 118M0915-01, for maintaining or repairing the module's input power interface.
Front Blank Panel and Rear Cover: When a power supply/PIM is not installed, a blank front panel (131150-01) and an input connector rear cover (128085-01) can be used to maintain rack integrity, prevent dust ingress, and meet safety codes.
Technical Documentation: For more detailed installation, wiring, configuration, and maintenance guidelines, please refer to the *3500/15 Power Supply User Guide* (part number 129767) or access the Bently Nevada official technical support website bntechsupport.com and its Media Library.
VI. Conclusion
The 106M1081-01 Universal AC Power Input Module is far more than a simple power junction box. It is an intelligent, safe, and globalized frontline component of the power subsystem within the Bently Nevada 3500 Series Machinery Protection System. Its voltage/frequency adaptability eliminates barriers posed by regional power differences; its precise input protection mechanisms (especially overvoltage fuse protection) establish a robust safety barrier for downstream critical equipment; its support for building a redundant, hot-swappable architecture provides the highest level of power supply reliability for mission-critical continuous operations; and the suite of international hazardous area certifications it holds makes it an indispensable certified element within safety solutions for high-risk industries such as Oil & Gas and Chemicals.
In today's era of Industry 4.0 and smart manufacturing, which emphasize high availability and predictive maintenance, choosing foundational power components like the 106M1081-01—with its advanced design, comprehensive certifications, and compatibility—is a wise cornerstone for building a resilient, reliable, and maintainable machinery health monitoring and protection system. It not only ensures continuous data acquisition and stable system operation but also, through its inherent safety design and redundancy capabilities, contributes value to the overall plant's asset safety and operational continuity.
