3500/45-01-00 Bently Nevada Monitor Module

3500/45-01-00 Bently Nevada Position Monitor

Product Introduction

The 3500/45-01-00 from Bently Nevada is a high-performance position monitor. It works inside the 3500 series monitoring system. This module supports multiple transducer types. For example, it handles Proximitor, RPT, and DC LVDT inputs. You can also use AC LVDT or rotary potentiometer sensors.

Many plants use this monitor for thrust position and differential expansion. Additionally, it measures case expansion and valve position. The 3500/45-01-00 provides front panel LEDs for status. These include OK, TX/RX, and Bypass LEDs. Each channel gets a dedicated recorder output of +4 to +20 mA. Short circuits on these outputs do not affect monitor operation.

Furthermore, this module has a fast update rate of 100 ms or less. Its resolution reaches 0.3662 µA per bit. Accuracy is within ±0.33% of full scale typically. Therefore, you can trust the data for machine protection.

Technical Specifications

Inputs and Signal Types

The Bently Nevada 3500/45 Position Monitor accepts one to four signal inputs. Input impedance depends on the sensor type. Specifically, DC LVDT inputs use 1 MΩ. Proximitor or RPT inputs use 10 kΩ. AC LVDT inputs use 137 kΩ. Rotary potentiometer inputs use 200 kΩ.

Sensitivity Options

For thrust measurement, sensitivity can be 3.94 mV/μm or 7.87 mV/μm. Differential expansion options include 0.394 mV/μm or 0.787 mV/μm. Additionally, ramp differential expansion offers four settings. These range from 0.394 V/mm to 7.874 V/mm.

For AC LVDT case expansion, sensitivity varies from 9.45 to 28.74 mV/V/mm. Valve position with AC LVDT has many options. Rotary potentiometer valve position uses 41 mV per degree. RPT valve position uses 140, 70, or 50 mV per degree.

Power Consumption

The 3500/45-01-00 consumes 7.7 watts typical with Position I/O. With AC LVDT I/O, it uses 8.5 watts typical. For rotary potentiometer I/O, it uses only 5.6 watts typical.

Outputs and Recorder

Recorder outputs are +4 to +20 mA. These are proportional to monitor full scale. Load resistance can be 0 to 600 Ω. Voltage compliance ranges from 0 to +12 Vdc across the load. Resolution is 0.3662 µA per bit. Error at room temperature is ±0.25%. Over the full temperature range, error stays within ±0.7%.

Frequency Response and Accuracy

Direct filter has -3 dB at 1.2 Hz. Gap filter has -3 dB at 0.41 Hz. This applies to thrust, differential expansion, CIDE, case expansion, and valve position. Accuracy for all these measurements is typically within ±0.33% of full scale. Maximum error is ±1%.

Environmental and Physical Limits

Operating Conditions

The Bently Nevada 3500/45 Position Monitor operates from -30°C to +65°C (-22°F to +150°F). Storage temperature ranges from -40°C to +85°C (-40°F to +185°F). Humidity can reach 95% non-condensing.

Physical Dimensions

Height is 241.3 mm (9.50 in). Width is 24.4 mm (0.96 in). Depth is 241.8 mm (9.52 in). The module weighs 0.91 kg (2.0 lb).

Installation and Firmware Requirements

Rack Compatibility

You can add the 3500/45-01-00 to an existing 3500 system. First, ensure your firmware and software meet minimum versions. The 3500/20 RIM firmware must be rev. G or later. Configuration software needs to be 2.41 or higher. Data acquisition software requires 2.20 or later. Operator display software needs 1.20 or later.

For valve position using RPT, you must have configuration software 3.00 or greater. The 3500/93 Display Interface Module (135799-01) requires firmware rev. G.

Mounting Guidelines

Install the module in a 3500 rack. Ensure proper slot alignment. The front panel LEDs will show status after power-up. OK LED indicates normal operation. TX/RX LED shows communication activity. Bypass LED lights when bypass mode is active.

Packaging List

• 3500/45-01-00 Position Monitor module (main board) – 1 unit

• Factory packing with anti-static protection – 1 set

• No certificates or warranty documents included

Shipping Information

We ship via FedEx, UPS, or DHL. All items are new and original. Factory packaging ensures safe transport.

Frequently Asked Questions (FAQ)

1. What transducers work with the 3500/45-01-00?
It works with Proximitor, RPT, DC LVDT, AC LVDT, and rotary potentiometers. Each input type has specific impedance and sensitivity settings.

2. Can I use this monitor for valve position measurement?
Yes, absolutely. The Bently Nevada 3500/45 Position Monitor supports valve position via AC LVDT, rotary potentiometer, or RPT. Multiple sensitivity options are available.

3. Does a short circuit on recorder outputs damage the module?
No, it does not. Monitor operation remains unaffected by short circuits on recorder outputs. This adds a layer of protection in the field.

4. What is the update rate for all channels?
The update rate is 100 ms or less. This ensures timely data for machine protection and control systems.

5. Which firmware version do I need for RPT valve position?
You need 3500 Configuration Software 3.00 or greater. Additionally, the 3500/20 RIM must be at firmware rev. G or later.