Functional Description

The module provides high-precision monitoring and protection for rotating machinery. It processes signals from eddy current displacement probes and velocity/acceleration sensors, supporting real-time condition monitoring and alarm functions within the 3500 system.

Channel Configuration

Number of channels: 4

Paired programming: Supported

Enables simultaneous handling of 2 measurement functions

Independent signal processing per channel

Input Signal Types

Eddy current displacement probe signals

Velocity / acceleration sensor signals

Measurement Functions

Radial vibration

Axial displacement (axial position)

Differential expansion

Eccentricity

Vibration velocity

Acceleration

Other standard rotating machinery parameters

Outputs

Analog output: 4–20 mA

Digital alarm outputs:

Alert / Danger alarms

Fully compatible with 3500 system alarm logic

Interface & System Integration

Compatible with the 3500 system high-speed data bus

Supports hot swapping, allowing module replacement without system shutdown

Power Requirements

Power supply: 3500 system rack power supply

+24 V DC

Power consumption: approximately 1.09 W

Environmental Conditions

Operating temperature: –30 °C to +65 °C

Storage temperature: –40 °C to +85 °C

Mechanical Characteristics

Dimensions (approx.): 191 × 130 × 19 mm
(length × width × thickness)

Weight (approx.): 0.2 kg

Typical Applications

Turbine and compressor protection

Bearing and shaft vibration monitoring

Axial position and thermal expansion monitoring

Machinery condition diagnostics and predictive maintenance

BENTLY 3500/42 128240-01 Prox/Seismic I/O Module