Product Overview
The Bently Nevada 3500/70-01-00 is a 4-channel Recip Impulse/Velocity Monitor designed specifically for reciprocating compressor protection. It continuously monitors crankcase and crosshead vibration, comparing signals against user-programmable alarms to drive machinery protection. This industrial automation module accepts input from seismic transducers, conditions the signal, and provides essential machine information for operations and maintenance personnel.
With the 3500 Rack Configuration Software, each channel can be programmed for Impulse Acceleration, Acceleration 2, Recip Velocity, or Low Frequency Recip Velocity. The 3500/70-01-00 is part of the 3500 series, ensuring seamless integration into existing Bently Nevada monitoring racks.
Technical Specifications
Key specifications of the Bently Nevada 3500/70-01-00 include:
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Inputs: Accepts 1 to 4 proximity probe signals; input impedance 10 kΩ (acceleration) and >1 MΩ (velocity).
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Power Consumption: 7.7 watts nominal.
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Sensitivity (Impulse Acceleration & Acceleration 2): 0.51 – 11.72 mV/(m/s²) or 5 – 115 mV/g.
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Sensitivity (Recip Velocity & Low Frequency Recip Velocity): 3.54 – 22.64 mV/(mm/s) or 90 – 575 mV/(in/s).
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Recorder Outputs: +4 to +20 mA proportional to full-scale, with accuracy within ±0.05 mA (±0.14 mA over temperature).
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Front Panel Buffered Outputs: One coaxial per channel, 550 Ω output impedance, short-circuit protected.
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Weight: 0.91 kg (2.0 lb).
Industry Applications
The 3500/70-01-00 is essential for reciprocating compressors in oil & gas, chemical processing, and power generation. For example, in a natural gas pipeline compressor station, the monitor detects abnormal crankcase vibration early, preventing catastrophic failure and reducing unplanned downtime. Its ability to provide both alert and danger setpoints ensures operators can take timely action.
Installation & Setup
Install the monitor in a 3500 rack: it occupies one full-height front slot, with the I/O module in one full-height rear slot. Ensure proper grounding and use the 3500 Rack Configuration Software to set channel functions and alarm setpoints. The front panel LEDs (OK, TX/RX, Bypass) provide immediate status indication.
Maintenance & Reliability
Routine checks include verifying LED status, inspecting front panel connectors for damage, and ensuring the module is within the operating temperature range (-30°C to +65°C for standard I/O, 0°C to +65°C for barrier modules). The foldback current protection (15.4 to 24.9 mA) prevents damage under fault conditions, enhancing long-term reliability.
Compatibility & Integration
The Bently Nevada 3500/70-01-00 integrates seamlessly with the 3500 rack system, communicating with other modules via the rack backplane. It supports proximity and seismic transducers, and the recorder outputs can be connected to external monitoring systems.
Buying Guide
Before purchasing, verify the I/O option (01 = Prox/Velom I/O Module with Internal Terminations) and agency approval (00 = None) to match your requirements. Ensure your rack has available slots. PLC Source PRO offers genuine Bently Nevada 3500/70-01-00 modules with reliable sourcing and fast delivery.