nput Characteristics

Supported input types:

Proximity sensor (Proximitor / RPT)

DC LVDT

AC LVDT

Rotary potentiometer

Input impedance:

Proximitor / RPT: 10 kΩ

DC LVDT: 1 MΩ

AC LVDT: 137 kΩ

Rotary potentiometer: 200 kΩ

Electrical Characteristics

Output signal: 4–20 mA analog output

Typical power consumption: 5.6–8.5 W (depending on I/O configuration)

Operating voltage: Compatible with 3500 frame power supply, typically 24 VDC

Environmental Conditions

Operating temperature:

–30 °C to +65 °C (internal/external terminal I/O modules)

Storage temperature: –40 °C to +85 °C

Protection level: IP20 (frame-mounted installation)

Indicators

Status LEDs: OK / TX / RX / Bypass

Software Compatibility

3500 Configuration Software: v2.41 or later

Data Acquisition Software: v2.20 or later

Key Features

Multi-sensor input compatibility
Supports a wide range of position and displacement sensors, enabling monitoring of axial displacement, differential expansion, casing expansion, valve position, and more.

High-precision measurement
Utilizes advanced signal processing algorithms to achieve high measurement accuracy. Alarm thresholds are fully programmable and compliant with API machinery protection standards.

Seamless system integration
Fully compatible with the 3500 series framework, supporting system communication, diagnostics, and fast fault localization through LED status indicators.

High reliability and robustness
Industrial-grade design with strong anti-interference capability ensures long-term stable operation and minimizes unplanned downtime.

BENTLY 3500/45 176449-04 Position Monitor

Typical Applications

Steam turbines

Axial displacement

Differential expansion

Casing expansion

Valve position monitoring

Compressors and generators

Rotor position monitoring

Thrust bearing wear detection

Petrochemical and power industries

Real-time monitoring and protection of rotating machinery position parameters

Paper and steel industries

Position and status monitoring of large motors, fans, and auxiliary equipment