Overview
Configured for 16-channel temperature signal acquisition in the Bently Nevada 3500/65 Temperature Monitor system, the Bently Nevada 172103-01 (172103-01 RTD/Isolated Tip TC I/O Module) provides direct physical interface processing for RTD and isolated tip thermocouple inputs.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 172103-01 |
| Brand | Bently Nevada |
| Product Type | RTD/Isolated Tip TC I/O Module |
| System Compatibility | Bently Nevada 3500 Series Machinery Protection System / 3500/65 Temperature Monitor |
| Origin | USA |
| Weight | 0.45 kg |
| Dimensions | 2.4 x 11.8 x 24.1 cm |
| Rack Space Requirements | 1 full-height rear slot |
| Operating Temp | -30 deg C to +65 deg C |
| Storage Temperature | -40 deg C to +85 deg C |
| Power Consumption | Not specified |
| Number of Channels | 16 temperature monitoring channels |
| RTD Input Types | 3-wire RTD and 4-wire RTD |
| RTD Measurement Range | -200 deg C to +850 deg C |
| Thermocouple Input Types | J, K, T, E, R, S, B, N |
| Thermocouple Configuration | Isolated tip (floating) thermocouple inputs |
| Signal Conversion | 16-bit ADC |
| Measurement Accuracy | +/-0.1% of reading or +/-0.5 deg C, whichever is greater |
| Cold Junction Compensation | Internal automatic CJC |
| Terminal Interface | Front-panel barrier-type terminal blocks |
Rotor Temperature Signal Conditioning and Isolation Features
The 172103-01 module processes temperature sensor inputs through dedicated signal conditioning circuits before transferring measurement data to the 3500/65 Temperature Monitor. It supports mixed configurations of RTD and isolated tip thermocouple channels within the same module.
The isolated tip thermocouple design provides electrical separation between sensor circuits and system references. Therefore, it reduces ground loop effects during temperature measurement. The module also applies internal cold junction compensation to maintain thermocouple measurement accuracy across operating conditions.
For machinery temperature monitoring applications, the module supports sensor validation practices similar to other Bently Nevada monitoring architectures. These practices include checking input signal stability, verifying sensor wiring integrity, and maintaining correct channel scaling during configuration.
Frequently Asked Questions
Q: What temperature sensor types does the 172103-01 support?
A: The module supports 3-wire RTD, 4-wire RTD, and isolated tip thermocouple inputs including J, K, T, E, R, S, B, and N types.
Q: Can the 172103-01 combine RTD and thermocouple inputs in one module?
A: Yes. The 16 channels can be configured for RTD inputs, isolated tip thermocouple inputs, or a combination of both according to the 3500/65 configuration settings.
Q: Does the module require an external termination panel?
A: No. The module uses front-panel barrier-type terminal blocks for direct sensor wiring termination.
Field Installation Guidelines
- Install the module only in the designated rear slot position of the Bently Nevada 3500 rack configuration.
- Verify rack power removal before inserting or removing the I/O module.
- Route RTD and thermocouple wiring separately from high-current power conductors to reduce electrical interference.
- Use appropriate shield grounding practices according to the plant instrumentation wiring standard.
- Confirm correct sensor polarity and channel configuration before enabling temperature monitoring.
- Check thermocouple isolation requirements when connecting floating temperature sensors.
- Configure channel type, scaling, and alarm parameters through the 3500 Rack Configuration Software before operation.
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