Bently Nevada 3500/42M / 3500/42-09-01 Proximitor / Seismic Monitor
PROXIMITY AND SEISMIC INPUTS · PROGRAMMABLE CHANNEL PAIRS
Model Information
Product identityBently Nevada 3500/42M 3500/42-09-01 is a four-channel Proximitor/Seismic Monitor configuration for the 3500 machinery-protection rack. It accepts proximity and seismic transducer signals, conditions them into vibration and position measurements, and compares the resulting static values with programmable alarm setpoints.
The channel pairs in Bently Nevada 3500/42M 3500/42-09-01 can be assigned to radial vibration, REBAM, thrust position, acceleration, differential expansion, shaft absolute, eccentricity, circular acceptance region or velocity. Channels 1–2 can perform one function while channels 3–4 perform another function or the same function.
At the rack boundary, Bently Nevada 3500/42M 3500/42-09-01 exposes buffered transducer outputs and passes monitor status to the rack relay and communication modules. Alert setpoints can be applied to active static values, while danger setpoints can be assigned to two active static values.
Technical Specifications
Verified data| Technical item | Value |
|---|---|
| Brand | Bently Nevada |
| Product type | Proximitor/Seismic Monitor |
| Model group | 3500/42M 3500/42-09-01 |
| Channels | 4 |
| Input types | Proximity and seismic transducers |
| Channel programming | Channels programmed in pairs |
| Supported functions | Radial vibration, REBAM, thrust, acceleration, differential expansion, shaft absolute, eccentricity, circular acceptance region and velocity |
| Alarm setpoints | Alert for active static values; danger for two active static values |
| Buffered outputs | Buffered transducer outputs at the monitor front panel |
| Rack interface | 3500 monitor slot with associated I/O module |
| Configuration | 3500 Rack Configuration Software |
| Status indicators | OK, TX/RX and BYPASS LEDs |
| I/O option | Prox/Seismic I/O with internal or external terminations |
| Measurement data | Static values derived from conditioned input signals |
| Software baseline | 3500/01 version 2.50 or later |
| Module role | Continuous monitor and alarm evaluator |
| Output relationship | Monitor data and status available to rack relay and communication paths |
Diagnostics and Protection
Product focusBently Nevada 3500/42M 3500/42-09-01 compares conditioned transducer values with configured Alert and Danger thresholds.
The module conditions proximity or seismic input before calculating the selected measurement. Conditioning occurs before the selected monitor function is evaluated.
Alert and Danger setpoints are applied to the active static values returned by each channel. Alert and Danger states are separate configured outputs.
Front-panel OK, TX/RX and BYPASS indicators expose the monitor and rack communication state. The front indicators expose monitor state in addition to the alarm values.
Bently Nevada 3500/42M / 3500/42-09-01 exposes the BYPASS state separately from a bad transducer input. BYPASS is a distinct monitor state and must not be read as a bad transducer by itself.
Monitoring and Control
Integration focusThe four channels in Bently Nevada 3500/42M 3500/42-09-01 are organized as two programmable channel pairs.
Channels 1–2 and 3–4 can run different supported functions or the same function. Each pair carries its own selected measurement function.
The selected channel type determines whether the monitor reports vibration, position, acceleration, velocity or another supported value. The selected function determines how the conditioned signal is represented.
Buffered transducer signals and monitor status remain available to the connected rack modules. Buffered outputs preserve access to the transducer signal at the monitor boundary.
Bently Nevada 3500/42M / 3500/42-09-01 makes buffered transducer outputs available at the monitor interface while the rack handles relay and communication distribution. The rack relay and communication paths consume the monitor data and status.
Common Product Questions
Field questionsHow are channels arranged in Bently Nevada 3500/42M / 3500/42-09-01?
In Bently Nevada 3500/42M / 3500/42-09-01, configure the four channels as two pairs. Channels 1–2 can perform one function and channels 3–4 can perform another or the same function.
Which transducers can Bently Nevada 3500/42M / 3500/42-09-01 accept?
Within Bently Nevada 3500/42M / 3500/42-09-01, the monitor accepts proximity and seismic transducer inputs through the selected Prox/Seismic I/O module. Match the I/O termination option to the field wiring.
What alarm values does Bently Nevada 3500/42M / 3500/42-09-01 provide?
Within Bently Nevada 3500/42M / 3500/42-09-01, configure Alert setpoints for active static values and Danger setpoints for two active static values on each active channel pair.
What does the BYPASS indicator mean on Bently Nevada 3500/42M / 3500/42-09-01?
In Bently Nevada 3500/42M / 3500/42-09-01, the BYPASS indicator reports the monitor bypass state. Check the rack configuration and bypass command before treating the state as a transducer fault.
Can Bently Nevada 3500/42M / 3500/42-09-01 report acceleration and velocity?
Yes. In Bently Nevada 3500/42M / 3500/42-09-01, acceleration and velocity are supported channel functions, along with radial vibration, thrust, eccentricity, differential expansion and other listed functions.
What should be checked if Bently Nevada 3500/42M / 3500/42-09-01 shows a bad input?
In Bently Nevada 3500/42M / 3500/42-09-01, check the I/O termination, transducer wiring, channel-pair assignment and configured function in that order. Keep the monitor input path separate from the relay output path.
Customer Support
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