Product Introduction: 3500/65-02-00 172109-01
The 3500/65-02-00 172109-01 is a Tachometer / Keyphasor® Input Module from the Bently Nevada 3500 machinery monitoring system. This module is a critical system component responsible for processing signals from a speed sensor (typically a proximity probe or magnetic pickup) to provide a once-per-revolution (1X) timing reference, known as the Keyphasor signal. This signal is fundamental for measuring rotational speed, phase reference for vibration analysis, and synchronizing other monitoring modules within the 3500 rack. The "172109-01" is likely a specific hardware or firmware revision.
Technical Parameters
The key technical specifications for this module are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 3500/65-02-00 172109-01 |
| System | Bently Nevada 3500 |
| Module Type | Tachometer / Keyphasor® Input Module |
| Dimensions (H x W x D) | 190 mm x 55 mm x 120 mm (Standard 3500 Rack Slot) |
| Weight | 0.5 kg (approximate) |
| Input Channels | 2 independent channels |
| Input Signal Type | Proximitor, Magnetic Pickup, Photoelectric Sensor |
| Input Signal Frequency Range | 0.5 Hz to 30,000 RPM |
| Keyphasor Signal Output | Provides a once-per-revolution digital pulse to all monitor modules in the rack |
| Speed Indication | Yes (via the 3500 framework software) |
| Power Supply | Powered by the 3500 Rack; +24 VDC from the rack's power supply |
| Operating Temperature | -20°C to +65°C |
Application Scenarios
The 3500/65 Tachometer Module is indispensable in any application where rotational speed and a phase reference are critical for machinery protection and condition monitoring.
Steam & Gas Turbines:
Provides the essential speed and Keyphasor reference for overspeed protection, startup/shutdown monitoring, and for synchronizing vibration measurements from radial vibration and axial position probes.
Centrifugal Compressors:
Used for surge control systems, performance calculations, and to provide the phase reference for analyzing vibration data to detect imbalance, misalignment, and shaft cracks.
Large Pumps and Fans:
Monists rotational speed for performance control and provides the timing signal needed for order-tracking vibration analysis.
Electric Motors and Generators:
Used for overspeed protection and to synchronize vibration analysis, helping to distinguish between electrical and mechanical faults.
Integral Reciprocating Compressors:
Provides a timing reference for analyzing torsional vibration and dynamic cylinder pressure.
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