1. General Information

• Manufacturer: Bently Nevada (Baker Hughes)

• Model Number: 3500/45

• Spare Part Number: 176449-04

• Product Name: Universal Position Monitor Module

• Series: 3500 Machinery Protection System

• Module Type: Full-height four-channel universal position monitor

• Application: Multi-type displacement measurement for steam turbine, gas turbine and rotating machinery; monitors thrust position, differential expansion, valve position, linear displacement and rotational position; supports multiple sensor types.

• Matching I/O Board: 140072-04 (Internal termination board)

• Compliance: API 670, SIL 2 Certified

2. Functional Description

• Channel Quantity: 4 independent universal input channels

• Monitoring Function: Thrust Position, Differential Expansion, Valve Position, Linear Displacement, Rotational Position

• Supported Sensors: Eddy-current probe, LVDT(AC/DC), RPT, Potentiometer

• Channel Configuration: Fully programmable per single channel

• Alarm Logic: Independent Alert & Danger alarm trip setpoints

3. Electrical Specifications

• Backplane Power: +5 VDC from rack backplane

• Power Consumption: 11.0 W typical

• Sensor Power: -24 VDC / +24 VDC selectable

• Input Signal Range: Programmable for different sensor types

• Frequency Response: DC ~ 1 kHz (Slow displacement dedicated)

• Analog Output: 4-channel isolated 4-20mA output, Max 600 Ω load

• Isolation Voltage: 1500 VAC channel-to-system isolation

4. Environmental Specifications

• Operating Temperature: -30 °C ~ +65 °C (-22 °F ~ +149 °F)

• Storage Temperature: -40 °C ~ +85 °C (-40 °F ~ +185 °F)

• Relative Humidity: 5% ~ 95% (Non-condensing)

• Anti-vibration: Compliant with API 670 industrial vibration standard

5. Mechanical Specifications

• Structure: Full-height single slot module

• Dimensions (H × W × D): 241.3 × 24.4 × 241.8 mm

• Weight: Approximately 0.92 kg

• Mounting: 3500 standard rack slot installation, hot-swap capable

6. Compatible Devices

• Matching I/O Board: 140072-04 (Internal termination board)

• Sensor Type: Proximity probe, LVDT, RPT, Potentiometer

• System Rack: All standard 3500 series racks

7. Key Features

• Universal multi-sensor compatibility for various displacement signals

• Optimized for slow and static mechanical displacement parameters

• High resolution measurement for thermal expansion and valve stroke

• Internal terminal design for simple and reliable field wiring

• SIL 2 safety certification for industrial protection system

8. Critical Difference (40M VS 45)

• 3500/40M: Probe dedicated card, only eddy-current probe, high frequency shaft vibration/displacement.

• 3500/45: Universal position card, LVDT/RPT/probe, low-frequency static displacement (expansion/valve).