Description
Bently Nevada 172103‑01 RTD / Isolated‑Tip TC Internal Termination I/O Module
Product Overview
172103‑01 is the internal‑termination I/O assembly for 3500/65 (145988‑02) 16‑Channel Temperature Monitor within Bently Nevada 3500 machinery‑protection system. It provides rear‑rack field‑wiring terminals for RTD and isolated‑tip thermocouple sensors, transfers analog temperature signals to the 3500/65 main monitor board through rack backplane connector. This assembly cannot operate independently and must be installed behind 145988‑02 in the same rack slot to constitute a complete 3500/65‑01‑00 temperature monitoring unit.
172103‑01
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | 172103‑01 |
| Matching Main Board | 3500/65 (145988‑02) 16‑Channel Temperature Monitor |
| Termination Style | Internal Termination (field cables connect directly to rack rear plug‑in terminals) |
| Input Channels | 16 channels, supports mixed RTD / isolated‑tip TC per channel |
| Supported Sensor Types | 3‑wire / 4‑wire Pt100, Ni RTD; Type E/J/K/T isolated‑tip thermocouples |
| Terminal Accessory | Includes 173005 plug‑in terminal connectors |
| Power Supply | Supplied via 3500 rack backplane bus |
| Max Power Consumption | 1.2 W |
| Operating Temperature | ‑30 ℃ ~ +65 ℃ (rack); Storage:‑40 ℃ ~ +85 ℃ |
| Form Factor | Single‑slot plug‑in for standard 3500 instrument rack |
| Weight | Approx. 0.45 kg |
| Compliance | API 670 compliant; compatible with TMR triple‑modular‑redundancy system architecture |
| Installation | Mounted directly behind 145988‑02 main monitor inside same rack slot |
Key Features
- Internal termination architecture: Temperature sensor field cables land directly on rear plug‑in terminals of this I/O module. No external termination blocks and intermediate jumper cables required, simplifies cabinet wiring and reduces signal loop complexity.
- 16‑channel mixed‑sensor compatibility: Each channel can be individually configured for RTD or isolated‑tip thermocouple, flexible for multi‑sensor‑type site conditions.
- Transducer fault supervision path: Enables 3500/65 main board to detect sensor open‑circuit, short‑circuit and loop abnormal status.
- TMR system support: Fully compatible with triple‑modular‑redundancy deployment for safety‑critical machinery‑protection applications.
- Transparent for configuration: No separate software setup. All sensor type, alarm setpoint, delta‑temperature parameters are configured in 3500 Rack Configuration Software for paired 3500/65 monitor.
- Hot‑swap capable: Supports on‑line module replacement in 3500 rack while following official maintenance procedure.
Distinction note vs external‑termination counterpart
- 172103‑01: Internal Termination → field wiring connects directly to rack rear terminals, preferred for compact cabinet layout.
- 172110‑01: External Termination → requires interconnection flat cables plus remote external termination blocks, suitable for high‑EMI environment and cabinet pre‑wiring projects.
172103‑01
Typical Applications & Application Scenarios
Main Applications
- Physical signal interface for RTD and isolated‑tip thermocouple sensors for 3500/65 monitor.
- Collect bearing metal temperature, lube‑oil temperature, generator stator winding temperature, compressor suction/discharge process temperature.
- Deliver raw temperature data for absolute‑temperature alarm, delta‑temperature calculation, machinery protection trip logic and predictive‑maintenance trending.
Industry Scenarios
- Power generation: combined‑cycle plants, gas‑turbine & steam‑turbine units, large generator sets.
- Oil & gas: refinery turbo‑machinery, natural‑gas pipeline compressor stations.
- Petrochemical: process compressors, turbo‑expanders and other critical rotating equipment under API 670 specifications.
- Safety‑related sites adopting TMR redundant machinery‑protection architecture.
Supporting / Matching Components
- Mandatory paired main monitor: 145988‑02 (3500/65) 16‑Channel Temperature Monitor, standalone operation is not allowed.
- Host rack: 3500/05 instrument rack.
- Rack power supply: 3500/15 series power‑supply modules.
- Field sensors: Pt100 / Ni RTD, isolated‑tip thermocouples and shielded twisted‑pair sensor cables.
- Auxiliary modules:
- 3500/32M / 3500/33 relay modules: hardware alarm & trip contact output.
- 3500/92 / 3500/77M gateway modules: upload temperature data and alarms to DCS, SCADA or System 1 predictive‑maintenance platform.
- Configuration software: Bently Nevada 3500 Rack Configuration Software.
Related & Reference Part Numbers
- 145988‑02: 3500/65 main temperature monitor board
- 172110‑01: External‑termination I/O assembly alternative for 3500/65
- 173005: Plug‑in terminal connector (accessory for 172103‑01)
- 3500/65‑01‑00: Complete assembly (145988‑02 + 172103‑01 internal termination)
172103‑01
Installation & Maintenance Notes
- 172103‑01 must install behind 145988‑02 in one identical rack slot; cannot mix‑use internal‑termination I/O with external‑termination I/O for one monitor set.
- Use shielded twisted‑pair cables for temperature sensors; separate signal wiring from high‑power cables to minimize measurement noise.
- After hardware installation, validate channel status, sensor fault‑detection and alarm function inside 3500 configuration software.
- For TMR configuration, three complete 3500/65 assemblies must occupy physically adjacent rack slots.
- Perform hot‑swap replacement strictly following Bently Nevada official service manual.
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