The Bently Nevada 3500 Series is far more than a collection of monitor modules in a rack. It is a certified, connected, and flexible machinery protection system that has earned its place as the industry standard. Whether you are safeguarding a single gas turbine or an entire fleet of critical assets, the 3500 delivers the reliability, data accessibility, and configuration freedom required to move from reactive repairs to proactive asset management.
The Bently Nevada 3500 Series is not designed for laboratory conditions or intermittent use. It is built for the relentless demands of steam turbines, centrifugal compressors, reciprocating pumps, and every other critical machine that keeps your plant running. What gives operators genuine confidence is the platform’s full compliance with API 670, the most widely recognized specification for machinery protection systems worldwide. For reciprocating compressor applications, the 3500 also satisfies API 618 requirements, and maritime installations can order the system with DNV or Class NK certifications. When the 3500 is used as part of a safety instrumented system, third-party Functional Safety Certification is available for applications requiring up to Safety Integrity Level 2. Beyond these formal certifications, the system includes extensive self-checking and fault-tolerant design features that run continuously. Even in its simplest configuration, the 3500 represents the most reliable monitoring platform Bently Nevada has ever produced, giving you the confidence that false trips and missed trips are genuinely minimized.
A protection system that cannot share its data is little more than an expensive alarm panel. The 3500 Series solves this problem through a connectivity approach that prioritizes simplicity. The 3500/22M Transient Data Interface Module includes a built-in Ethernet port, allowing a single network cable to connect directly to System 1 diagnostic software. There are no bulky external modules, no extra wiring, and no additional rack slots required. When you need to communicate with plant control systems such as PLCs or DCSs, the 3500/92 Communications Gateway supports Modbus and Modbus TCP protocols over serial or Ethernet links. You can even install multiple gateways in one rack to achieve communication redundancy or to support several protocols at once. This means your vibration data, speed readings, and alarm events can flow seamlessly into your existing automation infrastructure without forcing you to rebuild your control architecture.
Every machine train has unique monitoring needs, and the 3500 Series refuses to force a one-size-fits-all solution. The platform offers the industry’s most extensive selection of measurement parameters, all managed through software configuration rather than hardware swaps. You can monitor radial vibration, thrust position, case expansion, rod drop, differential expansion, eccentricity, speed, and many other condition indicators from a single rack. The standard 19-inch size delivers more than twice the channel density of earlier systems, and you can choose between local or remote mounted displays or operate without a display entirely. With more than 100,000 racks installed globally, the 3500 has proven its adaptability across virtually every industrial application imaginable.
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