Description
Bently Nevada 128329-01 Proximitor Seismic I/O Module
The Bently Nevada 128329-01, also cataloged as the 128329-01 Proximitor Seismic I/O Module, operates as a dedicated hardware component for signal termination and routing of proximity and seismic sensor inputs within the Bently Nevada 3500 Series Machinery Protection System. The module provides the physical interface between field transducers and the 3500/42M Proximitor Seismic Monitor.
Hardware Specifications
| Parameter |
Specification |
| Model |
128329-01 |
| Brand |
Bently Nevada |
| Module Type |
Proximitor Seismic I/O Module with Internal Terminations |
| System Compatibility |
Bently Nevada 3500 Series, 3500/42M Proximitor Seismic Monitor |
| Supported Channels |
4-channel input interface |
| Supported Signal Types |
Radial vibration, thrust position, eccentricity, velocity, acceleration, differential expansion |
| Input Signal Range |
-10 VDC to +10 VDC |
| Termination Type |
Internal terminal blocks |
| Weight |
Approx. 0.80 kg |
| Dimensions |
Not specified |
| Operating Temp |
-30 deg C to +65 deg C |
| Storage Temp |
-40 deg C to +85 deg C |
| Humidity |
95% non-condensing |
| Power Consumption |
Not specified |
| Origin |
Not specified |
Eddy-Current Probe Scaling and Rotor Dynamics Signal Handling
The 128329-01 module is configured for machinery monitoring applications requiring direct sensor signal routing to the 3500/42M monitor. The interface supports proximity transducer inputs associated with eddy-current probe measurement systems, where signal scaling and gap voltage validation are processed by the monitoring channel electronics.
For proximity measurement circuits, the standard -10 VDC gap voltage target is used as a reference condition for probe operation verification. The module design supports controlled signal transfer for rotor dynamics monitoring functions, including vibration displacement analysis and machine shaft movement evaluation.
The internal termination arrangement reduces additional field wiring interfaces and supports consistent sensor connection between the machinery protection rack and external transducers. Signal routing is designed to maintain channel separation and minimize cross-talk effects between vibration measurement circuits.
Frequently Asked Questions
Q: Is the 128329-01 a standalone vibration monitor?
A: No. The 128329-01 is an I/O interface module installed in a Bently Nevada 3500 Series rack. It provides field signal termination and routing to compatible monitor modules such as the 3500/42M.
Q: Does the module provide internal field terminations?
A: Yes. The 128329-01 includes internal terminal blocks for direct field wiring connection at the rear of the 3500 rack.
Q: Can the module process vibration signals independently?
A: No. The module performs signal interface functions. Signal conditioning, alarm processing, and monitoring functions are executed by the installed 3500 monitor module.
Field Installation Guidelines
Install the 128329-01 in the designated rear I/O position of a compatible Bently Nevada 3500 Series rack.
Connect field sensor wiring according to the approved system wiring diagram. Maintain proper separation between sensor signal cables and high voltage power conductors to reduce electrical interference.
Use shielded instrumentation cables where required by the machinery protection system design. Connect cable shields according to the site grounding standard and avoid creating unwanted ground loops.
Verify proximity probe connections, sensor polarity, and gap voltage conditions before placing the monitoring channel into service. Confirm that the installed monitor module configuration matches the connected transducer type and measurement function.
