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- 3500/65-02-00 172109-01
- Temperature Monitor Module
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- 241.3 × 24.4 × 241.8 mm
- 0.91kg
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Bently Nevada 3500/65-02-00 — Part Number 172109-01
16-Channel Temperature Monitor I/O Module
1. Product Overview
The Bently Nevada 3500/65-02-00, Part Number 172109-01, is an RTD/Isolated Tip Thermocouple Input/Output (I/O) Module designed for use with the 3500 Series 16-Channel Temperature Monitor.
It provides the external-termination interface for temperature sensors connected to the monitoring system. The module supports compatible resistance temperature detector (RTD) and isolated-tip thermocouple (TC) signals, allowing temperature measurements from multiple points on industrial machinery to be collected and processed by the associated monitor.
The module is intended for use in continuous industrial monitoring applications, including turbines, compressors, motors, generators, pumps, and other critical equipment where temperature changes can indicate abnormal operating conditions.
The 172109-01 part number identifies the external-termination I/O module. It is important to distinguish this component from the complete 3500/65 monitor: the I/O module provides the sensor interface, while the associated monitor performs temperature monitoring, setpoint comparison, and alarm-related functions.
2. Brand and Product Series
| Item | Specification |
|---|---|
| Brand | Bently Nevada |
| Product series | 3500 Series |
| Product family | 3500 Machinery Protection System |
| Model configuration | 3500/65-02-00 |
| Part number | 172109-01 |
| Product type | RTD/Isolated Tip TC I/O Module |
| Main purpose | Temperature sensor signal interface |
| Associated monitor | 3500/65 16-Channel Temperature Monitor |
| Input signal types | Compatible RTD and isolated-tip thermocouple signals |
| Termination arrangement | External terminations |
| Installation | Rear I/O position in a compatible 3500 rack |
| Typical application | Industrial machinery temperature monitoring |
The 3500 Series is designed for machinery monitoring and protection in industrial environments. The 3500/65 temperature monitoring arrangement combines the main monitor with a compatible I/O module and suitable sensor wiring. The 172109-01 is the external-termination I/O component within that arrangement.
3. Detailed Technical Specifications
The table below focuses on the 172109-01 I/O module, rather than the complete 3500/65 monitor. Physical specifications refer to the I/O module itself.
| Parameter | Specification |
|---|---|
| Model configuration | 3500/65-02-00 |
| Part number | 172109-01 |
| Product description | RTD/Isolated Tip TC I/O Module, External Terminations |
| Associated monitoring system | 3500 Series |
| Compatible monitor | 3500/65 16-Channel Temperature Monitor |
| Input capacity | Supports 1–16 configured temperature inputs through the associated monitor |
| Supported sensor types | Compatible RTDs and isolated-tip thermocouples |
| RTD support | Compatible 3-wire and 4-wire RTD configurations |
| Thermocouple support | Types E, J, K, and T, subject to system configuration |
| Input impedance | Greater than 1 MΩ per input lead |
| Nominal power consumption | Approximately 3 W for the 3500/65 monitoring arrangement, subject to the applicable specification |
| RTD excitation current | Approximately 913 ± 7 μA at 25°C per transducer |
| Temperature resolution | 1°C or 1°F, as configured |
| Typical monitor accuracy | Approximately ±3°C at 25°C under specified conditions |
| Thermocouple cold-junction compensation accuracy | Approximately ±2°C at 25°C under specified conditions |
| Alarm processing | Performed by the associated 3500/65 monitor |
| Front-panel indicators | Provided by the associated monitor: OK, TX/RX, Bypass |
| Termination type | External |
| External termination block | Compatible block required |
| External termination cable | Compatible cable required |
| I/O module dimensions (H × W × D) | 241.3 × 24.4 × 99.1 mm |
| I/O module weight | Approximately 0.45 kg |
| Main monitor dimensions (H × W × D) | 241.3 × 24.4 × 241.8 mm |
| Main monitor weight | Approximately 0.91 kg |
| I/O module rack position | One full-height rear slot |
| Main monitor rack position | One full-height front slot |
| Approval option | The -00 suffix indicates no additional agency approval option specified by that code |
| Shipping weight | Depends on packaging and included accessories |
The dimensions and weight for the 172109-01 are commonly specified as 241.3 × 24.4 × 99.1 mm and approximately 0.45 kg. The main monitor is a separate component and has different dimensions and weight.
Configuration note: the complete 3500/65 system may require the monitor, the 172109-01 I/O module, a compatible external termination block, and an appropriate cable. Confirm all required items when ordering; the I/O module alone is not the complete temperature monitoring system.
4. Sensor Compatibility and Measurement Ranges
The module interfaces with supported RTD and thermocouple sensors through the associated 3500/65 monitor. The sensor type and measurement range must be configured to match the installed field device.
RTD sensor ranges
| Sensor type | Typical measurement range |
|---|---|
| 100 Ω platinum RTD, α = 0.00385 | -200°C to +850°C |
| 100 Ω platinum RTD, α = 0.00392 | -200°C to +700°C |
| 120 Ω nickel RTD | -80°C to +260°C |
| 10 Ω copper RTD | -100°C to +260°C |
Thermocouple sensor ranges
| Sensor type | Typical measurement range |
|---|---|
| Type E | -100°C to +1,000°C |
| Type J | 0°C to +760°C |
| Type K | 0°C to +1,370°C |
| Type T | -160°C to +400°C |
These ranges describe representative supported sensor types, not a universal range available to every channel simultaneously. The final usable range depends on the sensor, wiring arrangement, configuration, and measurement conditions.
5. Product Introduction
The 172109-01 is the external-termination I/O module associated with the 3500/65 temperature monitoring system. Its purpose is to provide the connection interface for compatible temperature sensors so that the associated monitor can receive the signals and determine the temperature at each configured measurement point.
Temperature measurements are important in industrial machinery because they can reveal changes in operating conditions. Rising bearing temperatures may be associated with friction, lubrication issues, excessive load, or other mechanical problems. Increasing motor winding temperatures can indicate heavy loading or inadequate cooling. Changes in turbine or compressor temperatures may also provide information about abnormal operation.
The I/O module forms part of the signal path between the field sensors and the monitor. The associated 3500/65 processes the input signals, calculates temperature values, and compares readings with user-configured alarm setpoints.
The external-termination design separates the field termination arrangement from the rear I/O module. This can suit installations where the termination hardware is positioned separately from the rack, provided the correct termination block and cable are used.
The 172109-01 should therefore be treated as a specific component within the temperature monitoring system, not as a standalone temperature transmitter or a complete monitor. Correct selection requires checking the associated monitor, termination block, cable, sensor types, and system configuration.
6. Main Applications
6.1 Turbine temperature monitoring
Steam and gas turbines operate under demanding mechanical and thermal conditions. Temperature sensors may be installed at selected bearing, auxiliary, and other critical measurement points to help operators monitor the machine’s thermal behavior.
The 172109-01 provides the external sensor interface for compatible temperature inputs used by the 3500/65 monitor. Temperature readings can then be considered alongside vibration and other machinery measurements during routine operation and fault investigation.
6.2 Compressor systems
Industrial compressors may operate continuously under varying loads and process conditions. Bearing temperatures and selected process temperatures can provide useful information about changes in operating behavior.
The external-termination arrangement supports installations designed to route sensor wiring through compatible termination hardware. This can be useful where the field wiring layout requires the termination point to be separated from the rack-mounted electronics.
6.3 Electric motors
Large motors may have RTD or thermocouple sensors installed in windings and bearings. Monitoring these points can help identify abnormal heating associated with electrical loading, cooling performance, friction, or other operating changes.
The 172109-01 connects compatible temperature signals to the monitoring arrangement. Alarm handling and temperature interpretation are performed by the associated monitor and the wider system configuration.
6.4 Generators
Generators often require temperature monitoring at selected winding, bearing, and auxiliary locations. Monitoring several points allows maintenance personnel to compare thermal behavior under different loads and operating conditions.
The module can be used as part of a compatible 3500/65 installation where external field terminations are required.
6.5 Pumps, gearboxes, and auxiliary equipment
Pumps, gearboxes, and auxiliary machinery can experience temperature changes related to friction, lubrication, load, or cooling. Compatible sensors installed at critical points can provide useful monitoring data.
The module supports the temperature signal connection within the overall system. Its suitability depends on the sensor specifications and the installation’s wiring and configuration requirements.
6.6 Industrial processing facilities
Power generation, refining, petrochemical, and other continuous-process facilities may have many temperature points spread across different machines. The 3500/65 system can consolidate compatible measurements, while the 172109-01 provides the external-termination I/O interface.
This arrangement can support consistent sensor wiring and integration with the site’s existing machinery monitoring practices.
7. Product Advantages
7.1 External termination arrangement
The principal configuration feature of the 172109-01 is its external-termination design. Compatible termination blocks and cables allow field wiring to be arranged separately from the rack-mounted I/O module.
This can help accommodate the physical layout of an existing installation, but the required accessories must be matched to the module.
7.2 Support for multiple temperature input points
When used with the 3500/65 monitor, the module supports a system with up to 16 configured temperature inputs. This allows multiple sensor signals to be organized within a single monitoring arrangement.
7.3 RTD and thermocouple compatibility
The associated monitoring system supports compatible RTDs and isolated-tip thermocouples. This allows the installation to use appropriate sensor types for different temperature ranges and measurement locations.
7.4 Integration with an established monitoring system
The module is designed for use with the 3500/65 and the 3500 rack architecture. It is not a general-purpose standalone I/O module, so its value depends on correct integration with the compatible monitor and the rest of the system.
7.5 Support for temperature-based condition monitoring
Temperature readings can help identify deviations from expected operating conditions. When interpreted alongside vibration, speed, position, and other measurements, they can contribute to equipment condition assessment and maintenance planning.
7.6 Defined physical format
The I/O module uses a defined rear-slot form factor. Knowing its dimensions and weight helps with rack planning, spare-parts management, and replacement preparation.
7.7 Easier planning for field wiring
Because the configuration uses external terminations, engineers can plan the termination block and cable arrangement as part of the installation. Cable length, connector type, routing, and grounding must still be confirmed before commissioning.
8. Installation and Maintenance Considerations
Before installing or replacing the 172109-01, verify the full model code and all associated hardware. A part number match should be accompanied by a compatibility check for the monitor, termination block, and external cable.
Recommended checks include:
-
Confirm that the associated monitor is a compatible 3500/65 unit.
-
Verify that the rear I/O module is the external-termination version.
-
Confirm the required external termination block and cable part numbers.
-
Check cable length, connectors, routing, and wiring condition.
-
Verify the installed sensor types and RTD wiring arrangements.
-
Check thermocouple polarity and grounding where applicable.
-
Confirm rack slot allocation and software/firmware compatibility.
-
Review configured measurement ranges and alarm setpoints.
-
Record the existing system configuration before replacing hardware.
-
After installation, verify the sensor readings and alarm behavior using approved procedures.
Some replacement I/O revisions may require a firmware update on the associated monitor. Check the compatibility requirements for the exact revision before swapping hardware, since an unsupported combination can result in an I/O mismatch or system diagnostic fault.
9. Five Related Models in the Same Series
The following models are related to the 3500 machinery monitoring family. They have different functions and should not be considered direct replacements unless the required measurement type and system configuration match.
| Model | Product type | Main parameters and functions | Dimensions (H × W × D) | Weight (kg) |
|---|---|---|---|---|
| 3500/65-01-00 | 16-channel temperature monitoring configuration | RTD/isolated-tip TC inputs; internal terminations | Monitor: 241.3 × 24.4 × 241.8 mm; I/O: 241.3 × 24.4 × 99.1 mm | Monitor: approx. 0.91; I/O: approx. 0.45 |
| 3500/60 | Temperature monitor | Six-channel temperature monitoring; exact sensor options depend on configuration | Verify exact module and I/O version | Verify |
| 3500/61 | Temperature monitor with recorder outputs | Temperature monitoring with additional recorder-output functionality | Verify exact module and I/O version | Verify |
| 3500/62 | Process variable monitor | Monitors compatible process signals, according to the installed configuration | Verify exact hardware version | Verify |
| 3500/42M | Proximitor/Seismic monitor | Compatible vibration and position monitoring applications | Verify exact module and I/O version | Verify |
The 3500/65-01-00 is closely related because it uses the same general temperature-monitoring family but has an internal-termination arrangement. The 3500/60 and 3500/61 may be relevant when fewer temperature channels are needed, while the 3500/62 and 3500/42M serve different measurement functions.
10. Five Popular Models from the Same Brand
These models are used in different parts of industrial machinery monitoring and proximity measurement systems. Dimensions and weights depend on the exact version, so values should be confirmed before purchasing or designing a replacement.
| Model | Product category | Main parameters and functions | Dimensions (H × W × D) | Weight (kg) |
|---|---|---|---|---|
| 3500/15 | Power supply module | Supplies power to a compatible 3500 rack; exact AC/DC input depends on part number | Verify exact version | Verify |
| 3500/22M | Transient Data Interface | Provides rack communication and data interface functions | Verify exact hardware revision | Verify |
| 3500/25 | Enhanced Keyphasor module | Processes compatible Keyphasor signals for speed and phase reference applications | Verify exact version | Verify |
| 330103 | Proximity probe | Part of the 3300 XL 8 mm proximity transducer family; full code determines probe configuration | Depends on probe configuration | Depends on configuration |
| 330180 | Extension cable | Part of the 3300 XL 8 mm proximity transducer system; length and connectors depend on full part number | Depends on cable length and connectors | Depends on cable length |
The 3500/15, 3500/22M, and 3500/25 are rack components, while the 330103 and 330180 are part of a proximity transducer system. They address different requirements and should be selected according to the intended monitoring function.
11. Comparison of the 3500/65 Main Monitor and I/O Module
| Comparison item | 3500/65 main monitor | 172109-01 I/O module |
|---|---|---|
| Main function | Processes temperature signals and manages monitor functions | Provides external-termination sensor interface |
| Role in system | Temperature monitor | Associated I/O component |
| Input types | Configured RTD and isolated-tip TC inputs through compatible I/O hardware | Interfaces compatible RTD and isolated-tip TC signals |
| Alarm setpoint processing | Yes, through the monitor configuration | Not the primary function |
| External termination | Depends on the associated I/O configuration | Yes |
| Rack position | Full-height front slot | Full-height rear slot |
| Dimensions (H × W × D) | 241.3 × 24.4 × 241.8 mm | 241.3 × 24.4 × 99.1 mm |
| Weight | Approximately 0.91 kg | Approximately 0.45 kg |
| Replacement consideration | Must match the required monitor configuration | Must match monitor, termination block, cable, and sensor wiring |
This distinction matters when ordering spares. If only the external-termination I/O module is required, the 172109-01 is the relevant part number. If the monitor itself is faulty, replacing only the I/O module may not solve the problem.
12. Ordering Checklist
| Item | Requirement |
|---|---|
| Model configuration | 3500/65-02-00 |
| I/O part number | 172109-01 |
| Product description | RTD/Isolated Tip TC I/O Module, External Terminations |
| Associated monitor | Compatible 3500/65 temperature monitor |
| Termination arrangement | External |
| Termination block | Confirm compatible part number |
| External cable | Confirm part number, connector arrangement, and length |
| Sensor types | Confirm RTD or thermocouple requirements |
| Wiring | Verify RTD lead configuration and thermocouple polarity |
| System compatibility | Check rack, monitor revision, firmware, and software |
| I/O dimensions | 241.3 × 24.4 × 99.1 mm |
| I/O module weight | Approximately 0.45 kg |
| Main monitor dimensions | 241.3 × 24.4 × 241.8 mm |
| Main monitor weight | Approximately 0.91 kg |
| Shipping weight | Confirm separately based on actual package contents |
13. Conclusion
The Bently Nevada 3500/65-02-00, Part Number 172109-01, is an external-termination RTD/isolated-tip thermocouple I/O module designed for the 3500/65 16-Channel Temperature Monitor.
Its main role is to provide the sensor interface for compatible temperature inputs. The associated monitor performs the temperature processing, alarm setpoint comparison, and monitoring functions. This arrangement is suitable for industrial installations that need to monitor multiple temperature points across turbines, compressors, motors, generators, and auxiliary machinery.
The I/O module’s commonly specified dimensions are 241.3 × 24.4 × 99.1 mm, and its weight is approximately 0.45 kg. The associated main monitor is a separate component measuring approximately 241.3 × 24.4 × 241.8 mm and weighing approximately 0.91 kg.
Before ordering, confirm the complete model code, the external termination block, the cable, sensor compatibility, and the revision compatibility of the associated monitor. These details help ensure that the selected part fits the installed system and that the temperature monitoring arrangement can be commissioned correctly.