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The 3500/40M 176449-01 is a high-performance four-channel eddy current monitoring module, a core component of the industrial-standard 3500 mechanical protection system. This module primarily receives raw input signals from Bently Nevada eddy current sensors (Proximity Transducers), conditions and linearizes them, thereby accurately extracting key mechanical parameters such as shaft vibration, shaft displacement, eccentricity, and velocity.
Four independent channels per module
Multiple measurement modes
Hot-swappable and highly reliable
The Bently Nevada 3500/40M Proximitor Monitor is a four channel monitor that accepts input from Bently Nevada proximity transducers, conditions the signal to provide various vibration and position measurements, and compares the conditioned signals with user-programmable alarms. The monitor's primary function is to provide continuous, high-accuracy machinery protection by continuously comparing current measured values against configured alarm setpoints, driving alerts and automatic shutdowns when limits are exceeded. It integrates seamlessly with the 3500/93 135785-02 Display Module to offer operators real-time visual access to critical channel data directly at the cabinet. Furthermore, the 3500/40M 176449-01 supports extensive digital communication capabilities, allowing for effortless configuration, status monitoring, and data transmission to plant-wide Distributed Control Systems (DCS) and asset management software via specialized I/O modules.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 3500/40M 176449-01 Proximitor Monitor Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Oil and Gas Exploration
Installed on large natural gas injection pumps and export compressors on offshore platforms to monitor radial vibration and axial thrust position via proximity probe signals.
Petrochemical and Refining
Used for core centrifugal compressors in refinery ethylene plants and hydrocracking units to provide emergency shutdown protection through continuous axial displacement measurements.
Thermal Power Generation
Deployed on steam turbines, generators, and large boiler feedwater pumps in coal/gas-fired power plants to prevent catastrophic machinery damage using high-precision shaft vibration signals.
Nuclear Power Generation
Provides uninterrupted non-contacting shaft centerline plot and eccentricity monitoring at the bearings of nuclear reactor main coolant pumps, main turbines, and condensate pumps.
Hydroelectric Power Generation
Installed on the guide bearing housings and main shafts of large vertical hydro-generators to precisely measure shaft vibration caused by hydraulic unbalance or unit misalignment.
Iron and Steel Industry
Used to monitor the axial and radial dynamic runout of blast furnace blowers, large oxygen compressors, and hot rolling mill main bearings to safeguard continuous production line safety.
When using the 3500/40M (176449-01), it is essential to ensure that the backplane connector pins in the rack slot are undamaged, and the module must be pushed smoothly along the guide rails and secured with fixing screws to prevent pin bending during insertion. Transducer sensitivities for all channels (such as 100 mV/mil or 200 mV/mil) must be verified via the rack configuration software, and input wiring must be fully shielded and insulated according to negative voltage loop standards to prevent shorting between signal lines and rack ground. Furthermore, never operate the unit outside its ambient temperature parameters of -30°C to +65°C, and verify the matching proximitor's -24 VDC supply state periodically to eliminate false channel alarms or trips caused by unstable supply voltage.
The module integrates an internal, high-resolution 24-bit A/D converter to ensure ultra-low distortion during the signal conditioning stage, achieving a system-level measurement accuracy of ±0.33% of full scale at room temperature. Designed with four fully isolated input channels, the monitor features a high input impedance of 10 kΩ per channel. This provides a perfect match for Bently Nevada 3300 XL series proximity transducer systems with 50 Ω or 75 Ω output impedance, effectively preventing signal attenuation and reflection during transmission.
Without the 3500/93 135785-02 panel, what is the core function of the 3500/40M 176449-01?
Its core function is to accept raw signals from proximity transducers (e.g., eddy current probes), condition them into static values such as radial vibration, thrust position, eccentricity, or differential expansion, and compare them against user-configured alarm setpoints to drive protection actions.
How is the conditioned vibration data from the 3500/40M 176449-01 transmitted to the 3500/93 135785-02 screen for display?
The 40M module sends data to the 3500 rack backplane. After being processed by the Rack Interface Module (RIM), the data is transmitted via proprietary protocols to the 3500/93 display unit for local visualization.
When configuring slot functions for the 3500/40M 176449-01, what software is used for its and the 3500/93 135785-02's parameter settings?
Both are configured using the official Bently Nevada 3500 Rack Configuration Software to program channel types, full-scale ranges, alarm setpoints, and display screen layouts.
How is the channel-pairing logic processed by the 3500/40M 176449-01 presented on the 3500/93 135785-02 screen?
The channels of the 40M module are programmed in pairs (e.g., channels 1/2 and 3/4 can perform different functions). On the 3500/93, these channel data are grouped according to their physical pairing and intuitively displayed in graphical or text formats (e.g., X/Y radial vibration).
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