Bently Nevada 2155/40 Proximitor Input Module

Product Overview

The Bently Nevada 2155/40 is a high-precision Dual-Channel Proximitor Input Module designed specifically for the FieldMonitor 1701/15 machinery protection system. In critical rotating assets where shaft movement must be monitored with sub-micron accuracy, this module serves as the primary interface for eddy-current proximity probes. 

Technical Data Specifications

• Model Number: 2155/40

• Series: FieldMonitor 1701/15

• Module Type: Dual-Channel Proximitor Input

• Input Capability: 2 Independent Channels (X-Y pairs or single inputs)

• Compatible Sensors: Bently Nevada 3300 and 3300 XL Proximitor Systems

• Measurement Metrics: Radial Vibration, Axial Displacement, Shaft Centerline Position

• Signal Accuracy: Optimized for 200 mV/mil (7.87 V/mm) scale factors

• Diagnostics: Integrated OK Circuitry and Transducer Fault Detection

• Operating Temperature: -30 degrees Celsius to +70 degrees Celsius

• Compliance: API 670 compliant for Machinery Protection Systems

Model Code Breakdown

2155 (Base Series): This identifies the hardware platform as a Proximitor Input Module for the FieldMonitor architecture. It contains the high-speed analog-to-digital converters and the specialized circuitry required to excite and linearize proximity probe signals.

-40 (Configuration Option): This suffix represents the specific hardware and firmware revision. Within the FieldMonitor ecosystem, the -40 configuration is typically optimized for high-speed digital communication with the system Gateway and Terminal Modules. It ensures that the measurement ranges and internal filtering logic are correctly set for standard industrial turbine and compressor applications.