SHINKAWA MP-2S

Description

Product Description

The SHINKAWA MP-2S is a compact, single-channel vibration monitor and controller designed for the protection and condition monitoring of rotating machinery such as pumps, fans, motors, and compressors. This device functions as a dedicated safeguard, continuously measuring vibration (displacement, velocity, or acceleration) from a connected sensor and comparing it to user-defined alarm and danger (trip) setpoints. The primary function of the SHINKAWA MP-2S is to provide early warning of mechanical faults like imbalance, misalignment, bearing wear, or looseness, and to initiate automatic machine shutdown if vibration levels reach a critical threshold to prevent catastrophic damage. By implementing the SHINKAWA MP-2S, operators can move from reactive to predictive maintenance, enhancing equipment reliability and safety. Its straightforward design makes it a key component in standalone machine protection systems or as part of a larger plant-wide monitoring network.

Technical Parameters and Features

• Device Type: Single-channel Vibration Monitor/Controller.
• Input Signal: Accepts a signal from an eddy current (proximity) probe for measuring shaft relative displacement, or from a velocity sensor or accelerometer for measuring casing vibration. The input type is typically configurable.
• Measured Parameters: Monitors vibration amplitude, typically as:
  • Peak-to-Peak (µm or mils) for displacement probes.
  • RMS or Peak (mm/s or in/s) for velocity sensors.
• Setpoints: Provides two adjustable, independent setpoints:
  • Alert/Alarm: Pre-warning level to indicate deteriorating condition.
  • Danger/Trip: Machine shutdown level for immediate protection.
• Outputs:
  • Relay Outputs: Two SPDT or DPDT relay outputs (for Alert and Danger) for connection to control circuits, PLCs, or alarm panels.
  • Analog Output: A standard 4-20 mA or 0-10 V DC output proportional to the measured vibration level, for trending or connection to DCS/SCADA systems.
• Display: Features an analog meter or a digital LED/LCD display for real-time vibration level indication.
• Power Supply: Operates on standard industrial voltages (e.g., 85-264 V AC, 24 V DC).
• Configuration: Settings (setpoints, sensor sensitivity, filter ranges) are made via internal DIP switches or potentiometers.
• Construction: Housed in a robust, DIN-rail mountable or panel-mount enclosure suitable for industrial environments.

Advantages and Key Features

• Simplicity and Reliability: The SHINKAWA MP-2S is designed for focused, reliable operation. Its dedicated hardware ensures fast, deterministic response to vibration excursions without the complexity or programming required by a general-purpose PLC.
• Clear Visual and Electrical Indication: The built-in display provides instant, local readout of vibration levels, while its relay and analog outputs offer multiple pathways for integration into control and monitoring systems.
• Proven Effectiveness in Machinery Protection: As a core product from Shinkawa, a respected name in vibration monitoring, the MP-2S offers a cost-effective and proven solution for protecting a wide range of industrial rotating equipment.
• Easy Installation and Setup: With its straightforward wiring and configuration via switches/pots, it can be commissioned quickly by maintenance personnel without specialized software tools.
• Versatile Input Compatibility: The ability to accept signals from different sensor types (displacement, velocity) makes the SHINKAWA MP-2S adaptable to various monitoring applications, from shaft vibration to casing vibration.

Application Case Studies in Various Fields

• Industrial Cooling Tower Fan: A SHINKAWA MP-2S monitor connected to a vibration sensor on the fan gearbox provides an alarm to the control room when bearing wear begins and trips the motor if vibration becomes dangerous.
• Water Treatment Plant Centrifugal Pump: Monitors pump vibration. The 4-20 mA output is fed to the plant SCADA for trending, while the relay contacts are wired into the pump motor starter for automatic trip on high vibration, preventing seal or impeller failure.
• HVAC Air Handling Unit Fan: Used as a standalone safety device on a large supply fan. The MP-2S trips the fan if excessive vibration due to imbalance or dirt buildup on the blades is detected.
• Conveyor Drive Motor: Monitors the drive end bearing of a critical conveyor motor. The alert signal can trigger a work order for inspection, preventing unplanned downtime.

Comparison with Competing Products

When compared to using a PLC with an analog input card or more advanced multi-channel monitoring systems, the SHINKAWA MP-2S occupies a specific market position:

1. Dedicated Monitor vs. Programmable Controller: Unlike a PLC, which requires programming for logic and scaling, the MP-2S is a pre-configured, application-specific device. It is simpler and often more cost-effective for single-point protection, but less flexible for complex logic.
2. Standalone vs. Integrated System: The SHINKAWA MP-2S is a self-contained monitor. It is easier to install on individual machines but does not easily provide centralized data management. Competing networked systems (like Bently Nevada’s 3500 or Emerson’s CSI 6500) offer advanced diagnostics and networking at a higher cost and complexity.
3. Cost-Effectiveness for Single Points: For protecting a single machine or a few critical points, the MP-2S is often the most economical and straightforward choice. For monitoring dozens of points, a multi-channel system becomes more practical.

Selection Advice and Important Notes

• Select the Correct Sensor Type: Determine whether you need to measure shaft displacement (requires a proximity probe and driver) or casing vibration (requires a velocity sensor or accelerometer). Ensure the MP-2S is ordered or configured for the matching input type and sensitivity (mV/mm, pC/g, etc.).
• Set Appropriate and Justified Setpoints: Alarm and trip setpoints should be based on the specific machine’s operating history, manufacturer’s guidelines, or ISO vibration severity standards. Setting them too low causes nuisance trips; too high risks equipment damage.
• Ensure Proper Sensor Installation: The effectiveness of the SHINKAWA MP-2S depends entirely on a properly installed sensor. Follow the sensor manufacturer’s guidelines for mounting (location, orientation, mounting stud, cable routing) to ensure accurate signal pickup.
• Integrate Trip Signals Safely: Wire the Danger relay output into a safety-rated shutdown circuit (e.g., a hardwired input to the motor starter control circuit). It should be designed to fail safely in the event of monitor or power loss.
• Implement Regular Verification: Periodically verify the monitor’s function by simulating a vibration signal (with a portableshaker or calibrator) to ensure the setpoints trigger the relays correctly. This is a critical part of preventive maintenance.

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