Description
SHINKAWA VM-5P3 Product Description
Product Overview
SHINKAWA VM-5P3 is a Phase Marker Unit belonging to the SHINKAWA VM-5 Series rotating machinery monitoring platform. It is specifically designed to process phase-marker signals associated with rotating shafts and provide a reliable reference for rotational position and phase-related measurements. SHINKAWA identifies VM-5P3 as the dedicated phase-marker module within the VM-5 monitoring system, which is designed in accordance with the API 670 approach for rotating machinery monitoring and protection.
The SHINKAWA VM-5P3 receives signals from compatible phase-marker/proximity sensors and conditions them into usable timing information for the VM-5 monitoring architecture. It provides two-channel phase-marker processing, system-OK monitoring and alarm contact functionality, making VM-5P3 particularly useful in turbine supervisory instrumentation (TSI), compressor trains and other critical rotating-equipment applications where accurate shaft reference information is required for reliable vibration and machinery-condition analysis.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | VM-5P3 |
| Manufacturer | SHINKAWA Electric Co., Ltd. |
| Product Series | VM-5 Series |
| Product Type | Phase Marker Unit |
| Primary Function | Phase-marker signal processing |
| Number of Channels | 2 channels |
| Compatible Sensors | VK / RD / FK series, configuration dependent |
| Input Signal | Phase-marker / pulse signal |
| Signal Conditioning | Waveform shaping with adjustable hysteresis |
| Hysteresis Settings | 0.1 V / 0.2 V / 0.5 V / 1.0 V |
| Trigger Mode | Auto / Manual |
| System OK Function | Supported |
| System OK Recovery | Automatic or self-holding, configuration dependent |
| Alarm Output | OK alarm contact |
| Contact Type | C contact / dry contact |
| Contact Capacity | 250 VAC, 5 A / 30 VDC, 5 A |
| Installation | VM-5 Series instrument rack |
| Communication | Serial interface option available |
| Application | Turbine Supervisory Instrumentation / machinery monitoring |
The official VM-5P3 specification identifies selectable input sensor families including VK, RD and FK, adjustable hysteresis values of 0.1, 0.2, 0.5 and 1.0 V, and configurable trigger and System-OK recovery modes.
Main Features and Advantages
Dedicated Phase Reference Processing
The VM-5P3 provides a dedicated interface for phase-marker signals in a rotating-machinery monitoring system. A stable phase reference is essential when correlating vibration or other dynamic measurements with shaft rotational position. This allows the monitoring system to distinguish changes occurring at particular shaft positions and improves the interpretation of rotating-equipment behavior.
VM-5P3
Two-Channel Configuration
The module processes two phase-marker channels, providing flexibility for machinery configurations requiring multiple shaft reference signals. This is particularly useful in turbine-generator and compressor systems where different shaft locations or redundant reference arrangements may need to be monitored.
Adjustable Waveform Conditioning
A key feature of VM-5P3 is its configurable waveform-shaping hysteresis. The available settings include 0.1 V, 0.2 V, 0.5 V and 1.0 V, allowing the signal-conditioning threshold to be matched to the characteristics of the connected phase-marker sensor and field signal.
Compatible Sensor Architecture
SHINKAWA specifies compatibility with its VK, RD and FK sensor families, providing a dedicated sensor-to-monitoring-system signal chain. The broader VM-5 platform can also accommodate existing third-party transducer inputs in certain configurations, supporting modernization and replacement projects where complete field instrumentation replacement is undesirable.
System Health Monitoring
The VM-5P3 incorporates System-OK monitoring and an OK alarm contact. This enables the external DCS, PLC or machinery protection system to distinguish a healthy phase-marker monitoring channel from an instrumentation fault. The specification also allows automatic recovery or self-holding behavior depending on configuration.
Designed for Rotating Machinery Protection
The VM-5 platform covers shaft vibration, bearing vibration, axial position, eccentricity, differential expansion, temperature and rotational speed. Within this architecture, the VM-5P3 provides the phase reference required by the broader machinery-monitoring system, making it an important supporting module rather than a conventional standalone speed sensor.
Front-Panel and Modular Architecture
VM-5 systems are modular and allow monitoring functions to be selected according to the machinery configuration. SHINKAWA states that monitoring status and settings can be checked or adjusted from the front panel without disturbing machine operation, while the rack architecture supports expansion through additional monitoring and interface modules.
Application Fields
SHINKAWA VM-5P3 is primarily intended for rotating machinery condition monitoring, turbine supervisory instrumentation and machinery protection systems. Its phase-marker processing function is especially important where vibration or shaft-position information needs to be referenced to a defined angular position of the rotor.
In thermal power plants, VM-5P3 can be incorporated into turbine-generator TSI systems to provide phase reference information for shaft vibration and rotational monitoring. Accurate phase-marker information can assist in identifying vibration characteristics associated with particular rotor positions and operating conditions.
In gas-turbine and combined-cycle plants, the module can support phase-related monitoring of turbine shafts and generator trains. Its two-channel configuration and configurable waveform-shaping characteristics allow the monitoring system to accommodate different sensor arrangements and signal conditions.
In oil and gas and petrochemical facilities, the VM-5P3 can be used with compressor trains, turbine-driven compressors and other high-value rotating equipment. Stable phase information can improve the correlation of vibration data with shaft rotation and support more effective condition assessment.
In chemical processing, metallurgy, marine systems and heavy industrial equipment, the module can form part of a larger VM-5 machinery-monitoring rack. The VM-5 platform is designed for applications ranging from smaller compressors to large steam-turbine generators, and SHINKAWA specifically positions the system for TSI applications and API 670-oriented rotating-machinery monitoring.
Related Products
- VM-5C — Eccentricity monitor for measuring shaft runout/eccentricity; complements VM-5P3 when rotor eccentricity and phase reference are monitored together.
- VM-5K — Dual vibration monitor for shaft vibration measurements; VM-5P3 can provide phase-marker information used in rotating-shaft analysis.
- VM-5S — Dual tachometer monitor for rotational-speed measurement; suitable when speed monitoring is required alongside phase-reference processing.
- VM-5R — Tachometer monitor for rotational-speed measurement within the VM-5 architecture.
- VM-5T — Dual thrust monitor for axial-position/thrust monitoring of rotating machinery.
- VM-5D — Dual differential-expansion monitor for turbine rotor/casing expansion measurements.
- VM-5Y1/Y2/Y3 — VM-5 relay modules used to interface monitoring alarms and status signals with external control/protection systems.
- VM-5Z5 / VM-5Z6 / VM-5Z7 — VM-5 Series power-supply units providing operating power to monitoring modules installed in compatible racks.
- VM-5H4 — VM-5 instrument rack for mounting and integrating multiple monitoring modules.
- VM-5W2 — Dual-power-supply instrument rack designed for higher-availability VM-5 monitoring configurations.
