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The 3500/42M (Part Number 138708-01) is a high-precision Shaft Absolute I/O module designed for integration within the Bently Nevada 3500 Machinery Protection System. This module interfaces with absolute shaft encoders to...
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The 3500/42M (Part Number 138708-01) is a high-precision Shaft Absolute I/O module designed for integration within the Bently Nevada 3500 Machinery Protection System. This module interfaces with absolute shaft encoders to deliver precise, non-incremental angular position data, enabling accurate monitoring of rotating machinery behavior.
The module features internal terminations, simplifying wiring requirements while improving signal integrity in demanding industrial environments. By continuously tracking the shaft’s absolute angular position, it provides highly accurate data for phase reference measurements and advanced vibration analysis. This capability is essential for condition monitoring, diagnostics, and predictive maintenance strategies used in critical rotating equipment.
| Parameter | Specification |
|---|---|
| Module Type | Shaft Absolute Input I/O Module |
| Model Number | 3500/42M |
| Part Number | 138708-01 |
| Termination Style | Internal Terminations |
| Input Capacity | 4 channels for absolute encoder inputs |
| Data Precision | Continuous absolute angular position tracking |
| Physical Dimensions | 2.5 cm × 11.2 cm × 24.2 cm |
| Module Weight | 0.4 kg |
| System Compatibility | Bently Nevada 3500 Series Rack |
The 3500/42M 138708-01 is commonly deployed in critical asset protection systems for large rotating machinery, including steam turbines, gas compressors, and high-speed gearboxes. In these applications, accurate real-time shaft positioning is essential for phase analysis, rotor dynamics evaluation, and machine protection.
The module is engineered for continuous 24/7 operation in harsh industrial environments, ensuring reliable data acquisition and long-term stability within turbine monitoring and vibration protection systems.
How does the 3500/42M differ from a standard proximity probe module?
The 3500/42M processes absolute angular position data from shaft encoders, while standard proximity probe modules measure shaft displacement or relative vibration using eddy-current probes.
Does this module require external terminal blocks?
No. The 138708-01 variant features internal terminations, which eliminates the need for additional external terminal blocks and simplifies installation.
