Description

The Bently Nevada 172103-01 is a 16-channel RTD and isolated tip thermocouple I/O module designed for use with the 3500/65 Temperature Monitor within the 3500 Series Machinery Protection System. This module serves as the physical interface between field temperature sensors and the monitor, providing signal conditioning and internal terminations for up to 16 channels. It is engineered to support critical machinery protection by monitoring bearings, windings, lubrication systems, and turbine components.

Features

• 16-channel capacity for comprehensive temperature monitoring.
• Supports 3-wire RTD, 4-wire RTD, and isolated tip thermocouple inputs.
• Internal termination design eliminates the need for external termination blocks.
• Automatic internal cold junction compensation for thermocouple inputs.
• 16-bit ADC conversion with high measurement accuracy (±0.1% of reading or ±0.5 degC).
• Compatible with 3500 Rack Configuration Software for alarm setpoint programming.

Applications

• Steam, gas, and hydroelectric turbines.
• Centrifugal, axial, and reciprocating process gas compressors.
• Large industrial motors and power generation units.
• Critical high-pressure or high-flow pumps in refineries and water treatment facilities.
• Power recovery expanders and specialized turbo-machinery.

Technical Specifications

Installation Guidelines

• Ensure the 3500 rack is powered down before inserting or removing the I/O module.
• The module requires one full-height rear slot in the 3500 series rack.
• Use 16 to 22 AWG twisted shielded pair or triad cabling for field wiring.
• Shields must be connected to the instrument earth at the barrier ground.
• Internal termination modules cannot be used in conjunction with external termination blocks or cables.
• Follow standard ESD (Electrostatic Discharge) precautions when handling the module to prevent damage to internal circuitry.

Compliance and Certifications

The 172103-01 complies with FCC Part 15, EMC Directive 2014/30/EU, LV Directive 2014/35/EU, and RoHS Directive 2011/65/EU. It holds hazardous area certifications including CSA/NRTL/C Class I, Zone 2, and ATEX/IECEx II 3G Ex nA nC ic IIC T4 Gc, as well as marine certifications from ABS and DNV GL.

FAQ

What is the 172103-01?

The Bently Nevada 172103-01 is an RTD/Isolated Tip Thermocouple I/O module with internal terminations, used specifically for the 3500/65 Temperature Monitoring system.

Does this module require an external termination block?

No, this model features internal terminations. If your application requires an external termination block, the alternative model 172109-01 should be used.

How are the sensors configured?

The module is configured via the 3500 Rack Configuration Software, allowing for a mix of supported RTD and thermocouple inputs across the 16 available channels.