The Bently Nevada 3500/50 Tachometer Module is a critical component of the 3500 Series Machinery Protection System. It is engineered to measure rotational speed and provide phase reference signals for shafts in turbines, compressors, and other essential rotating equipment. The 3500/50-04-01 configuration provides high-integrity speed monitoring, ensuring reliable overspeed protection and accurate phase reference data for machinery diagnostics and control systems.
Features
High-integrity speed monitoring for critical turbomachinery.
Supports single or redundant configurations to meet stringent overspeed protection requirements.
Provides essential phase reference signals for synchronous vibration analysis.
Designed for continuous, reliable online monitoring in compliance with API 670 standards.
Fully compatible with other 3500 Series modules for integrated plant-wide machinery protection.
Configurable via 3500 Rack Configuration Software for customized alarm thresholds.
Includes buffered transducer outputs for external diagnostic equipment.
Applications
This module is widely used in industrial environments for monitoring speed on critical assets, including steam and gas turbines, centrifugal compressors, fans, and large motors. It serves as a primary input for safety-instrumented systems requiring overspeed detection and phase-locked vibration monitoring.
Technical Specifications
Manufacturer
Bently Nevada
Part Number
3500/50-04-01
Series
3500 Machinery Protection System
Product Type
Tachometer Module
Channels
2 independent tachometer channels
Input Compatibility
Proximity probes or magnetic pickups
Power Consumption
8 W typical
Operating Temperature
-30 degC to +65 degC
Storage Temperature
-40 degC to +85 degC
Humidity
95% non-condensing
Installation Guidelines
Ensure the 3500 rack power is disconnected before installing or removing the module.
The module is designed for standard half-height 3500 rack slots; ensure proper seating and engagement with the backplane connectors.
Use shielded cabling for all transducer inputs to minimize electromagnetic interference (EMI).
Maintain proper grounding practices for the 3500 rack to ensure signal integrity and safety compliance.
Verify that the I/O module matches the configuration settings in the 3500 Rack Configuration Software before commissioning.
FAQ
Q: Can the 3500/50 module be used for overspeed protection? A: Yes, the module is designed for high-integrity overspeed protection and can be configured in redundant pairs to meet safety requirements.
Q: What type of sensors does this module support? A: The 3500/50-04-01 supports standard proximity probes and magnetic pickup sensors for speed measurement.
