Bently Nevada 3500/62 163179-03 Process Variable Monitor
The Bently Nevada 3500/62 163179-03 Process Variable Monitor is a high-performance module designed for continuous measurement and supervision of critical industrial process variables. Engineered for seamless integration within the 3500 Machinery Protection System, it delivers precise monitoring, advanced signal conditioning, and reliable real-time data acquisition. Manufactured in the USA and shipped from Xiamen, China, this unit provides stable operational performance in demanding environments, ensuring dependable protection and optimized equipment diagnostics.
This monitor supports a wide range of input types, offering ±10 Vdc signal capability and 4-20 mA DC barrier I/O functionality for flexible interfacing with various field devices. It features 500-volt isolation, 13.66-volt voltage compliance, and a typical power consumption of 7.0 watts, enabling safe and efficient operation across diverse process applications. Built to meet the stringent requirements of industrial automation and condition monitoring, the module ensures accurate measurement integrity under continuous load.
Designed for durability and environmental resilience, the unit operates reliably within a temperature range of 0°C to +65°C and can be stored from -40°C to +85°C without performance degradation. It supports up to 95% non-condensing humidity, making it suitable for harsh or variable site conditions. With an estimated shipping weight of 0.8 kg and dimensions of 2.6 × 25.3 × 24 cm.
The Bently Nevada™ 3500/62 Process Variable Monitor is a six-channel module designed for continuous processing of critical machine parameters such as pressure, flow, temperature, and level. It supports +4 to +20 mA current inputs as well as proportional voltage inputs ranging from -10 Vdc to +10 Vdc. The monitor conditions incoming signals and compares them against user-programmable alarm thresholds to provide reliable machinery protection.
The 3500/62 continuously evaluates measured parameters against configured alarm setpoints, initiating alarms whenever monitored values exceed defined limits. In addition to its protection functions, the module supplies essential real-time process information for both operations and maintenance personnel. Configuration is performed through the 3500 Rack Configuration Software, which allows the module to be programmed for either current-based or voltage-based measurements.
The monitor supports three I/O module options to accommodate different signal types: ±10 Vdc, isolated 4-20 mA, and 4-20 mA with intrinsically safe zener barriers. The Internal Barrier I/O version includes terminals for external power input, enabling intrinsically safe power delivery to connected 4-20 mA transducers. When deployed in a Triple Modular Redundant (TMR) architecture, Process Variable Monitors must be installed in adjacent groups of three. In this configuration, the system employs dual voting logic to ensure accurate operation and to maintain full machinery protection even in the event of a single-point failure.

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Features
- Six-channel process variable monitoring for critical parameters such as pressure, flow, temperature, and level.
- Accepts +4 to +20 mA current inputs and proportional voltage inputs from -10 Vdc to +10 Vdc for flexible signal integration.
- User-programmable alarm setpoints with continuous comparison for real-time machinery protection.
- Multiple I/O module options, including ±10 Vdc, isolated 4-20 mA, and 4-20 mA with intrinsically safe zener barriers.
- Internal Barrier I/O version provides external power terminals for delivering intrinsically safe power to 4-20 mA transducers.
- Fully configurable through the 3500 Rack Configuration Software for either current or voltage measurement modes.
- Compatible with Triple Modular Redundant (TMR) systems, supporting adjacent three-module installation with voting logic for high reliability.
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Applications
- Continuous monitoring of vital industrial process conditions to prevent equipment damage and unplanned downtime.
- Integration into machinery protection systems requiring high accuracy and real-time event detection.
- Use in hazardous or safety-critical environments where intrinsically safe signal handling is required.
- Deployment in TMR architectures for machinery requiring fault-tolerant monitoring and maximum system availability.
- Suitable for oil & gas, petrochemical, power generation, and other heavy-industry operation and maintenance monitoring needs.
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