
Introduction
The model 3500/40M-01-01 is a Turbine Supervisory Monitor (TSM) Module for the Bently Nevada 3500 Machinery Protection System. This module is a specialized, multi-channel monitor designed to handle a variety of transducer inputs critical for monitoring large rotating equipment, particularly steam and gas turbines. The "M" in the model number signifies a modular or enhanced version capable of monitoring multiple parameters from a single slot in the 3500 rack. It conditions signals, performs scaling, and provides dedicated alarm setpoints for each channel to protect against machine faults.
Parameters / Specifications
The following table outlines the key technical parameters for the 3500/40M-01-01 module.
| Parameter | Specification |
|---|---|
| Model Number | 3500/40M-01-01 |
| Description | Turbine Supervisory Monitor (TSM) Module |
| Physical Dimensions (H x W x D) | Approx. 190 mm x 40 mm x 120 mm (7.5 in x 1.6 in x 4.7 in) [Standard 3500 Series frame slot] |
| Weight | Approx. 0.5 kg (1.1 lb) |
| Input Channels | 4 or 6 independent channels (configurable) |
| Compatible Input Types | • Eddy Current Probes (Vibration, Position, Keyphasor) • Velocity Seismic Transducers • LVDTs (Linear Variable Differential Transformers) • DC Inputs (for temperature, pressure, etc.) |
| Key Measurements | Radial Vibration, Axial Position, Eccentricity, Differential Expansion, Case Expansion, Speed, Custom DC values |
| Power Supply | Powered by the 3500 rack; typically +24 VDC from the system power supply. |
| Communication | Integrates with the 3500 rack backplane for communication with other modules and the external monitoring system. |
| Operating Temperature | 0°C to +65°C (+32°F to +149°F) |
| Compatibility | Bently Nevada 3500 Series Rack. |
*Note: The exact number of channels and their specific configuration (e.g., which channel is set for vibration vs. position) is defined by the "-01-01" suffix and the system's software configuration. Always refer to the official product manual for detailed specifications.*
Application Scenarios
The 3500/40M module is a versatile cornerstone for comprehensive machinery protection on high-value assets.
Complete Turbine Monitoring:
The primary application is monitoring steam and gas turbines. A single module can be configured to monitor multiple parameters such as radial vibration, axial (thrust) position, eccentricity, and speed, providing a consolidated view of turbine health.
Differential Expansion Monitoring:
Crucial for large steam turbines, this module can process signals from LVDTs to monitor the differential expansion between the rotor and stator, preventing destructive rubs during startup and shutdown.
Multi-Parameter Machinery Protection:
Used on other critical machinery like compressors and large pumps to monitor a combination of vibration, position, and custom 4-20 mA inputs (e.g., bearing temperature, process pressure) in a single module slot, optimizing rack space.
Custom Monitoring Applications:
Its flexibility with DC inputs allows it to be used for non-vibration parameters, making it suitable for monitoring various analog signals that require alarm setpoints within the protection system.
OEM Integrated Control Systems:
Often specified by turbine and compressor OEMs as the standard monitoring solution within their control panels, providing a fully integrated and configurable protection system for their equipment.
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7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
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