Yokogawa 3500/40 140734-01 - Dual-Channel Monitoring Module
Description:
The Yokogawa 3500/40 140734-01 is a Dual-Channel Monitoring Module designed for the Yokogawa 3500 Machinery Management System. This module serves as a flexible and versatile monitoring interface, capable of accepting a wide range of dynamic input signals from various transducer types. It is primarily used for monitoring vibration (both seismic and relative shaft displacement) and speed/phase reference (Keyphasor®) signals. The module conditions these signals, provides the necessary power to the transducers, and processes the data to generate valuable machine health information like overall vibration levels, and 1X and 2X amplitude and phase. This processed data is then used for alarming and shutdown functions via relay modules within the same 3500 system.
Specifications / Parameters
| Parameter | Specification |
|---|---|
| Model / Part Number | 3500/40 140734-01 |
| Product Type | Dual-Channel Monitoring Module |
| Rack Compatibility | Yokogawa 3500 Series Rack |
| Number of Channels | 2 independent channels |
| Input Types | Accepts signals from: • Proximity Probes (for shaft relative vibration) • Velocity Seismometers (for casing vibration) • Accelerometers • Keyphasor® (for speed and phase reference) |
| Key Measurements | • Overall Vibration (Gap, Velocity, Acceleration) • 1X and 2X Amplitude & Phase (for balance analysis) • RPM (Speed) |
| Transducer Power | Provides -24 VDC or -26 VDC power for eddy current probes, and constant current for accelerometers. |
| Module Slots | Occupies a single slot in a 3500 series rack |
| Dimensions (H x W) | Standard 3500 Module Size: Approximately 132 mm (H) x 62 mm (W) |
| Depth | Varies with rack and connector; module itself is shallow, but depth is rack-dependent. |
| Weight | Approximately 0.45 kg (1.0 lb) |
*Note: For mission-critical applications, always verify dimensions, weight, and technical specifications against the latest official Yokogawa 3500/40 data sheet or manual, as these are typical values.*
Application Scenarios
The 3500/40 module is a fundamental component for predictive maintenance and machinery protection across various industries. Its application scenarios include:
Shaft Vibration Monitoring on Turbomachinery:
Used on turbines, compressors, and large pumps to monitor relative shaft displacement using proximity probes. It detects unhealthy conditions like unbalance, misalignment, and oil whirl, which can lead to catastrophic rotor failure.
Casing Vibration Monitoring:
Monitors overall casing or bearing cap vibration using velocity sensors or accelerometers. This is crucial for machines where seismic vibration is a key indicator of mechanical health, such as on fans, motors, and some pumps.
Speed and Phase Reference (Keyphasor®):
Provides a once-per-turn timing signal from a Keyphasor® probe. This signal is essential for determining the phase angle of vibration, which is critical for field balancing and identifying specific malfunctions like a cracked shaft.
Integrated Machinery Protection System:
Acts as the primary input module within a 3500 rack, feeding processed data to relay modules (like the 3500/42 or 3500/15) to trigger alarms and initiate machinery shutdowns, preventing severe damage.
Power Generation and Oil & Gas:
Extensively used in power plants (for generators, turbines) and refineries (for centrifugal compressors) to ensure the continuous and safe operation of high-value assets, minimizing unplanned downtime.
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