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Product Introduction
The Bently Nevada 1701/25 1034549-21 Field Monitor Seismic Input Monitor is a highly reliable and precision-engineered monitoring module designed for vibration and seismic measurement in rotating machinery and structural applications. As part of the Bently Nevada 1701 Machinery Protection System, this seismic input monitor captures low-frequency vibration and seismic activity data from transducers such as velocity sensors or accelerometers, ensuring early detection of machinery imbalance, misalignment, or bearing faults.
This monitor is ideal for critical assets including turbines, compressors, pumps, and large rotating equipment that require real-time condition monitoring and protection against mechanical failures. Built with robust circuitry and advanced signal conditioning, the 1701/25 1034549-21 ensures accurate signal processing under harsh industrial environments.
Engineered to meet the high reliability standards of Bently Nevada’s vibration monitoring systems, it supports seamless integration with distributed control systems (DCS) and plant-wide monitoring networks. Its solid-state design minimizes maintenance while ensuring continuous, precise seismic data acquisition and conversion for both analog and digital signal outputs.
Technical Specifications
| Parameter | Description |
|---|---|
| Model | Bently Nevada 1701/25 1034549-21 |
| Product Type | Seismic Input Monitor |
| Function | Measurement and analysis of seismic and low-frequency vibration signals |
| Input Type | Velocity transducers / accelerometers |
| Input Range | ±10 V peak (typical) |
| Frequency Response | 0.1 Hz to 300 Hz |
| Sensitivity | Adjustable for various transducer types |
| Sampling Rate | 10 kHz (nominal) |
| Output Type | 4–20 mA analog output, digital communication via system backplane |
| Communication Interface | Compatible with Bently Nevada 1701 Field Monitor Network |
| Power Supply | 24 VDC nominal (±10%) |
| Power Consumption | 3.5 W (typical) |
| Isolation | Galvanic isolation between input and system bus |
| Alarm Channels | 2 programmable alarms per channel |
| Self-Diagnostics | Continuous internal diagnostics and status indication |
| Operating Temperature | -20°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | Up to 95% non-condensing |
| Mounting Type | DIN-rail or panel mounting |
| Dimensions (H × W × D) | 127 x 21.6 x 105 mm |
| Weight | 0.314 kg |
| Compliance | CE, RoHS, IEC 61000-6-2, IEC 61000-6-4 industrial EMC standards |
Product Applications
The Bently Nevada 1701/25 Seismic Input Monitor plays a vital role in machine condition monitoring and vibration protection systems. It is specifically designed to detect and record seismic or low-frequency vibrations that indicate early-stage mechanical issues. Typical applications include:
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Turbomachinery Monitoring: Detects seismic activity in gas and steam turbines for predictive maintenance.
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Compressor Protection: Monitors casing vibration to prevent mechanical damage from imbalance or resonance.
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Pump and Fan Systems: Provides continuous vibration feedback to avoid mechanical failures.
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Structural Health Monitoring: Measures foundation and casing vibrations for heavy equipment or machinery mounts.
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Power Generation Units: Used in turbines and alternators for seismic vibration analysis and safety interlocks.
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Industrial Automation Systems: Integrates with control systems for automatic shutdown in excessive vibration events.
By providing real-time data acquisition and advanced signal conditioning, the module ensures early detection of potential faults, enabling maintenance teams to act before catastrophic failure occurs.
Product Advantages
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High Measurement Accuracy: Provides precise seismic and low-frequency vibration readings for early fault detection.
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Robust Signal Processing: Built-in analog and digital signal conditioning ensures noise-free measurement.
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Integrated Self-Diagnostics: Monitors internal performance and alerts for abnormal operating conditions.
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Wide Compatibility: Works with a variety of Bently Nevada and third-party seismic transducers.
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Reliable Industrial Design: Operates effectively in environments with high vibration, temperature, and EMI.
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Flexible Configuration: Adjustable gain, alarm thresholds, and response parameters via system software.
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Dual Alarm Channels: Supports configurable alert and danger thresholds for critical protection.
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Continuous Monitoring: Enables 24/7 real-time condition monitoring of machinery vibration and seismic response.
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Easy Integration: Seamlessly integrates with the Bently Nevada 1701 Field Monitor system and DCS networks.
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Reduced Maintenance Costs: Solid-state reliability ensures long-term operation with minimal service requirements.
FAQ
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What type of sensors can be connected to the 1701/25 Seismic Input Monitor?
It supports velocity transducers and accelerometers, compatible with Bently Nevada seismic and vibration sensors. -
How does the monitor process seismic signals?
The input signals are amplified, filtered, and digitized for real-time analysis, alarm generation, and transmission to control systems. -
Is this monitor compatible with the 1701 Field Monitor platform?
Yes, it is fully compatible with the Bently Nevada 1701 system, operating as part of the modular field monitoring network. -
Can the alarm thresholds be configured?
Yes, both Alert and Danger levels can be individually programmed for each channel through system configuration tools. -
What kind of isolation is provided?
The input circuitry includes galvanic isolation from the system bus, ensuring noise immunity and safety. -
How does the self-diagnostic function work?
It continuously checks internal circuits, signal integrity, and power supply stability, reporting any anomalies to the control interface. -
Does the module support both analog and digital outputs?
Yes, it provides 4–20 mA analog outputs and digital communication through the system backplane. -
What is the frequency range for vibration measurement?
The typical frequency response is 0.1 Hz to 300 Hz, suitable for seismic and low-frequency machinery monitoring. -
How many alarm channels are available?
Each module supports two programmable alarms per channel, allowing flexible protection settings. -
Is the monitor compliant with industrial EMC standards?
Yes, it complies with IEC 61000-6-2 and IEC 61000-6-4, ensuring reliable operation in high-EMI industrial environments.
Related Models (Same Series or Function)
| Model | Description |
|---|---|
| 1701/20 | Field Monitor Power Supply Module |
| 1701/22 | Vibration Input Monitor for Proximity Probes |
| 1701/23 | Temperature Input Monitor |
| 1701/24 | Keyphasor Input Monitor |
| 1701/26 | Relay Output Module for System Alarms |
| 1701/27 | Communication Interface Module |
Popular Bently Nevada Models
| Model | Description |
|---|---|
| 3500/42M | Proximitor/Seismic Monitor for general vibration measurement |
| 3500/22M | Transient Data Interface Module |
| 3500/93 | System Rack Interface for configuration and communication |
| 330130-040-00 | Proximity Probe Extension Cable |
| 330180-91-00 | 3500 Series Rack Power Supply |
| 330103-00-07-10-02-00 | Proximity Probe for machinery monitoring |
