Bently Nevada 3500/40M 140734-01

Bently Nevada 3500/40M 140734-01 is a four-channel eddy current monitoring module for the 3500 protection system, compatible with 3300XL series eddy current probes and in compliance with API670 standards. It can monitor rotor parameters such as shaft vibration, axial displacement, and differential expansion. It supports software configuration of two-level alarm thresholds, and features signal self-check, 4-20mA output, waveform acquisition, and hardware interlock functions. It also supports hot-swaddling online maintenance. The module is installed on the 3500 rack, connected to sensors, DCS and interlocking systems, and is widely used in key rotating units such as steam turbines and chemical compressors. Real-time monitoring of the shaft system's operating status, abnormal hierarchical alarm, over-limit trigger shutdown protection, and simultaneous retention of fault waveforms to achieve safety interlock protection and fault diagnosis of the unit, facilitating predictive maintenance of equipment and avoiding major equipment accidents.

Product Features

1. Signal acquisition and processing: Four independent channels receive the signal from the eddy current preamplifier, complete filtering, amplification, analog-to-digital conversion, and calculate engineering values such as gap and vibration amplitude.

2. Multi-parameter monitoring: It can be configured to measure key parameters of the shaft system such as radial shaft vibration, axial displacement, rotor differential expansion, rotor eccentricity, and shaft position.

3. Hierarchical alarm management: The software customizes two levels of alarm thresholds for early warning and danger, supports alarm delay setting, and avoids false interlocking caused by instantaneous disturbances.

4. Interlocking and signal output: It can be combined with the system relay module to achieve hardware shutdown interlocking. Provide 4-20mA analog output for connection to the DCS control system; The backplane bus uploads dynamic waveforms, peaks, and average values to the upper-level diagnostic software.

5. Self-diagnostic function: Continuously detect probe disconnection, cable short circuit, signal out-of-range, and module hardware failure, generate fault alarms, and facilitate the troubleshooting of sensor and card issues.

6. Data Storage and upload: Capture alarm transient waveform data for post-fault source analysis to support equipment fault diagnosis;

7. Configuration Management: Configure channel names, measurement units, and alarm logic through the 3500 configuration software. Parameters are saved locally to the card and will not be lost in case of power failure.

Selection Guide

Part number 140734-01 of the 3500/40M belongs to the Bentley 3500 series four-channel eddy current monitoring module and is a commonly used card for monitoring the shaft system of the unit. When selecting a model, the first step is to confirm the compatibility of the rack. It is compatible with the standard 3500 series 19-inch rack and can be networked in a mixed manner with 3500 power modules, communication gateways, relay modules, and key phase modules. The sensor side is matched with Bently 3300XL series eddy current probes, extension cables and preamplifiers, supporting mainstream probe specifications such as standard 8mm and 11mm. When selecting the model, the purpose of the channel should be clearly defined: shaft vibration, axial displacement, differential expansion, eccentricity, etc. Confirm whether backplane waveform acquisition, 4-20mA analog output, and relay interlocking are required. Comply with the API670 rotating machinery protection specification, distinguish the configuration of protection channels and condition monitoring channels, and at the same time verify whether the explosion-proof and environmental temperature and humidity are suitable for the site, and determine the authorization of the supporting configuration software. The module supports hot plugging. When selecting the model, spare card parts can be reserved to facilitate online replacement in case of faults and shorten the downtime for maintenance.

Product Usage

1. Rack installation: Insert the 3500/40M module vertically into the spare slots of the 3500 series standard rack, secure it firmly, connect the rack backplane bus, and supply power to the entire rack with the matching power module.

2. Sensor wiring: The on-site eddy current probe and extension cable should be connected to the preamplifier. The signal line of the preamplifier should be connected to the 3500/40M card terminal in accordance with the specifications. Proper shielding and grounding should be done to reduce electromagnetic interference.

3. Software Configuration: Connect the computer to the 3500 communication gateway, use the accompanying configuration software, allocate channel functions, set the measurement range, alarm threshold, and alarm delay, configure the corresponding 4-20mA range, and download the parameters to the monitoring module.

4. System Integration: 4-20mA analog signals are connected to the DCS screen for real-time display of the unit operation data. The interlock signal is connected to the ETS shutdown protection circuit of the unit. The communication gateway is connected to the host computer configuration software to collect vibration waveforms in real time.

5. Debugging and verification: Under the static state of the unit, use the displacement verification block to calibrate the probe gap, check whether the monitoring readings are consistent with the standard values, and test whether the early warning, danger alarm and interlock actions are normal.

6. Operation and Maintenance: During the long-term operation of the unit, the module automatically monitors the signal status. When the card fails, the spare module can be hot-swappable online, the configuration parameters can be re-downloaded, and the replacement can be completed without shutting down the machine. Regularly export waveform data and conduct equipment trend analysis