BENTLY 3500-15 114M5330-01

Is a radial vibration probe interface module for machine condition monitoring

1. Product Overview
The Bently Nevada 3500/15 is a radial vibration probe interface module for machine condition monitoring. It is a key component in the Bently Nevada 3500 machinery protection system series.

Core Function: This module serves as the interface between the non-contact eddy current sensor system (typically consisting of a probe, extension cable, and preamplifier) ​​and the 3500 frame. It receives the raw RF signal from the preamplifier and conditions, demodulates, and processes it, converting it into a standard vibration signal for use in the monitoring system.

Product Model: 114M5330-01 is the module’s specific part number, used for ordering and identification.

Role: This module is the primary monitoring channel in the protection system of rotating machinery (such as steam turbines, gas turbines, compressors, pumps, and motors). It monitors radial shaft vibration in real time, a key parameter for assessing machine health.

2. Main Functions and Features
1.Signal Conditioning and Demodulation:

Receives raw high-frequency signals from two eddy current probes (typically mounted on the same bearing, 90 degrees apart, referred to as the X and Y directions).

Demodulates the RF signal into a DC voltage signal (gap voltage) proportional to the gap between the probe tip and the shaft surface.

Isolates the AC dynamic voltage (vibration AC) proportional to shaft vibration from the gap voltage.

2.Dual Alarm Channels:

Each 3500/15 module contains two completely independent monitoring channels (Channel A and Channel B).

Each channel can independently set Alert and Danger setpoints. When vibration levels exceed these setpoints, the module triggers the corresponding relay for alarm or shutdown protection.

3.Key Signal Outputs:

Dynamic Vibration Signal: Outputs an AC voltage signal (typically ±5V or ±10V) proportional to the shaft vibration amplitude for analysis by secondary instrumentation, a DCS, or a data acquisition system.

Gap DC Voltage: Outputs a DC voltage signal (typically -2V to -18V DC) proportional to the average probe gap. This signal is used to monitor probe operating status and mechanical alignment.

Buffered Sensor Signal: Provides a buffered output of the raw sensor signal for connection to diagnostic equipment (such as the TK-8 calibrator or data analysis software) for advanced diagnostics without affecting the primary monitoring circuit.

4.Self-Diagnostics and Status Monitoring:

The module continuously monitors the operating status of itself and the connected sensor system.

It can detect problems such as probe coil failure, cable open/short circuits, and module hardware failures, reporting them via the 3500 frame’s TDI (communication interface) module and illuminating the red OK LED on the module’s front panel (off indicates a fault).

5.Front Panel Status Indicators:

Each channel has Alert and Danger LEDs (yellow and red), which illuminate when the setpoint is triggered.

A Channel Inhibit LED (blue) illuminates when the channel is manually or logically inhibited.

An OK LED (green) indicates module and sensor circuit health.

A Bypass button temporarily bypasses the alarm function for maintenance.

5. Technical Specifications Summary
Power: Power is provided by the 3500 Series frame backplane.

Input Signal: RF signal from two Bently Nevada 3300/7200 Series eddy current probe proximitors.

Output Signal:

Dynamic vibration signal (AC)

Gap DC voltage

Buffered sensor signal

Frequency Response: Typically 0.4 Hz to 10 kHz (depending on the specific configuration), covering the vibration frequency range of most rotating machinery.

Compatibility: Fully compatible with the 3500 Series frame and can be configured and monitored using 3500 frame configuration software (such as System 1).

6. Application Scenarios
The 3500/15 module is widely used in industrial sectors requiring high reliability and safety to protect critical rotating equipment, including but not limited to:

Power Generation: Steam Turbine Generators, Gas Turbines

Oil & Gas: Centrifugal Compressors, Reciprocating Compressors, Pumps

Chemical Industry: Various Large Compressors and Fans

Metallurgy: Blast Furnace Blowers, Large Motors

Main Brand:

ABB        Allen-Bradley       Alstom       Bently       Emerson        Foxboro

GE           Schneider              MOOG         HIMA          Woodward    Honeywell 

Frequently Asked Questions:
1. How long does it take to receive the goods?
We have stock in stock and can accept same-day payment and delivery!

2. What payment methods do you accept?
There are many methods (T/T…) for you to choose from, and you can choose whatever you want.

3. Is there after-sales service?
Of course, if our products are brand new, they have a one-year warranty!

4. What courier services do you accept? We offer SF Express, DHL, and other international express delivery options.

5. How can I contact you?
You can contact me 24/7 via WeChat, Skype, WhatsApp, LINE, and my

☀️Tara(Sales Director)

📞Tel: + 86-13806028623

📮Whatsapp:+86-13806028623

💬Email: ydf8801@163.com

🏚️Ship to you via DHL/TNT/UPS/EMS/Fedex

🥇Product Condition: One-year warranty