Product Details:

Bently Nevada 81544-01 is a dedicated XDUCR I/O and Record Terminal Module developed for the Bently Nevada 3300/45 Dual Differential Expansion Monitor in the 3300 turbine supervisory instrumentation system. This rear rack terminal module acts as the signal interface between eddy current proximity transducers and the main differential expansion monitor board, receiving dual-channel transducer input signals and delivering analog output signals for external data recorders, DCS and data acquisition systems. It accurately transmits rotor axial differential expansion measurement signals, which reflect the thermal expansion difference between turbine rotors and casings, helping operators track thermal growth status of steam turbines in real time. The 81544-01 terminal module supports two independent transducer input channels, and can process signals from two sets of proximity probes simultaneously to capture both the magnitude and direction of differential expansion movement. It provides stable analog voltage output with high signal accuracy and low offset error, ensuring reliable data recording for long-term equipment condition tracking. The module adopts industrial-grade printed circuit board and reinforced terminal connectors, offering excellent anti-electromagnetic interference performance to maintain signal integrity under heavy vibration and electrical noise in power plant environments. It is designed for rear rack mounting of the 3300 monitoring rack, supporting straightforward wiring, installation and routine maintenance. It can operate reliably within a wide temperature range of -40°C to +85°C, and is widely used in power generation and petrochemical industries for steam turbine protection. This transducer terminal block forms an essential part of the differential expansion monitoring loop, allowing engineers to identify abnormal thermal expansion risks early and prevent turbine rubbing and severe mechanical failures caused by mismatched thermal growth between rotors and casings.

Core Attributes:

Brand: Bently Nevada

Model: 81544-01

Product Type: XDUCR I/O and Record Terminal Module

Compatible Monitor: Bently Nevada 3300/45 Dual Differential Expansion Monitor

Channel: Dual transducer input channels

Output Signal: 0 to -10 Vdc analog recording output

Mounting: Rear rack mount

Input Impedance: 10 kΩ typical

Feature: Dual channel signal transmission, high measurement accuracy, anti-interference, turbine differential expansion monitoring