Bently Nevada 3500/64M Order Number: 176449-05
Name: Dynamic Pressure Monitor Module
Belonging to: Baker Hughes Bently Nevada 3500 Unit Protection System, Single Slot Insert Card

1、 Core Overview
The 3500/64M is a 4-channel dynamic pressure monitoring card designed to collect dynamic pressure pulsation signals. Its most typical application is:
✅ Gas turbine combustion chamber pressure pulsation (combustion oscillation/thermoacoustic instability)
✅ Monitoring of compressor surge precursor and pipeline pressure pulsation
✅ Diagnosis of Pressure Fluctuations in Reciprocating Compressors
The module filters and processes the pressure sensor signal, outputs dynamic pressure amplitude, supports Alert and Danger alarm levels, and is connected to the 3500 system to participate in unit protection and status diagnosis.
2、 Key hardware parameters
Channel configuration: 4 independent pressure signal channels; Channel pairwise grouping (1&2/3&4)
Sensor compatibility: Supports 2-wire and 3-wire dynamic pressure transmitters (high-temperature pressure sensors)
signal processing
Configurable bandpass filter with two filtering modes: Low/High
Optional notch filter to avoid power frequency interference
Cascade Mode: Channel 1 input can be copied to all 4 channels, with different filtering parameters used for each group
Output: Buffer sensor signal per channel+recorder output (can be sent to DCS)
Configuration software: 3500 Rack Configuration Software
Power supply: Powered by the 3500 rack backplane
Panel indicator lights: OK, channel fault, alarm status LED
3、 Key points of model differentiation (easily confused in the market)
3500/64M 176449-05: Dynamic Pressure Monitoring Card (this model, pressure pulsation)
Do not confuse with the following models:
3500/64 (without M): Early version;
3500/65: Communication gateway;
3500/60/61: RTD/thermocouple temperature card;
3500/64M 140734-05: High density relay card (completely different functions, many merchants have mislabeled titles)
4、 Working conditions and industry applications
Gas turbines, large axial/centrifugal compressors, reciprocating compressors
Power plants, refineries LNG、 Coal chemical turbine unit
Function: Identify surge, combustion oscillation, and fluid excitation in advance to avoid major damage to the unit
5、 Supply and lifecycle information
Original factory status: It has gradually ceased production, and the original factory mainly focuses on maintenance and replacement. The market circulation includes brand new original equipment and disassembled testing spare parts;
Warranty: Brand new original regular 12 months, disassembly spare parts generally 3-6 months (different supplier policies);
Compatibility: Universal standard 3500 rack (both 3500/05 and 3500/06 racks are acceptable).
6、 Common supporting sensors
Bently 330400 series dynamic pressure sensor, high-temperature piezoelectric/piezoresistive dynamic pressure transmitter.

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