Bently Nevada 3500/65 172103-01 Temperature Monitoring Module

Product Overview

The Bently Nevada 3500/65 172103-01 provides continuous temperature monitoring for critical rotating machinery. This module accepts both RTD and thermocouple inputs directly. It operates as part of the 3500 series rack-based protection system. The device delivers precise temperature readings for bearings, stators, and process streams. Many power generation and oil & gas facilities rely on this module for asset protection.

Technical Specifications

Key Parameters

Parameter	Specification
Input Channels	16 differential analog inputs
Sensor Types	RTD (Pt100, Ni100) and Thermocouple (J, K, T, E)
Measurement Accuracy	±0.25°C for RTD; ±0.5°C for TC
Input Impedance	>10 MΩ for voltage mode
Common Mode Rejection	>100 dB at 50/60 Hz
Resolution	16-bit ADC per channel
Scan Rate	10 ms per channel (typical)
Isolation	500 VDC field-to-logic isolation
Power Consumption	7.5 W nominal from backplane
Operating Temperature	–30°C to +65°C
Storage Temperature	–40°C to +85°C
Relative Humidity	5% to 95% (non-condensing)
Dimensions	241 mm x 24.4 mm x 99.1 mm (height x width x depth)
Weight	0.68 kg (1.5 lbs) approximately

Interface and Connectivity

The Bently Nevada 3500/65 172103-01 features a front-facing terminal block for field wiring. This module uses a 48-pin connector for all sensor inputs. A separate serial port enables firmware upgrades and configuration uploads. The backplane provides power and communication with the main rack processor. Each channel includes built-in open-circuit and short-circuit detection. LED indicators show channel status and module health at a glance.

Component Layout and Energy Storage

The module contains six main functional blocks: input conditioning, ADC array, isolation barrier, microprocessor, power regulation, and communication interface. It includes onboard EEPROM for storing calibration data and configuration settings. A small supercapacitor maintains real-time clock settings during brief power interruptions. The board uses surface-mount components for improved vibration tolerance.

Installation and Configuration

Installing the Bently Nevada 3500/65 172103-01 requires inserting it into any standard 3500 rack slot. The system automatically assigns addresses based on slot position. Configuration software allows users to set alarm thresholds per channel independently. You can select RTD or thermocouple types using the front-panel DIP switches. The module supports both two-wire and three-wire RTD connections. Always verify wiring polarity before applying power to the system.

Typical Applications

This module excels in turbine bearing temperature monitoring applications. It also measures gas path temperatures in jet engines. Many operators use it for stator winding temperature supervision in generators. The Bently Nevada 3500/65 172103-01 suits pipeline compressor station installations as well. Its high channel density reduces overall system footprint significantly.

Compliance and Certifications

The Bently Nevada 3500/65 172103-01 carries CE and UL approvals for industrial use. It meets API 670 protection system requirements. The module also complies with IEC 61000-4 EMC immunity standards. These certifications ensure reliable operation in harsh industrial environments.

Ordering Information

Item	Detail
Manufacturer	Bently Nevada (GE Measurement & Control)
Model	3500/65
Part Number	172103-01
Category	Temperature Monitoring I/O Module
Country of Origin	USA
Lead Time	2–4 weeks (typical)
Warranty	12 months from shipment