Shinkawa LCU-37 Monitoring module
Shinkawa LCU-37 Local Control Unit is a machinery protection and condition monitoring module engineered by Shinkawa Electric. Designed for integration into Shinkawa’s VM series vibration monitoring systems, the LCU-37 receives, conditions, and processes analog signals from non-contact eddy-current proximity probes, velocity transducers, and accelerometers. It acts as a dedicated monitoring unit for continuous protection of critical rotating assets such as steam turbines, gas turbines, centrifugal compressors, and heavy industrial pumps.
Technical Parameter List
| Parameter | Specification |
| Model Code | LCU-37 |
| Manufacturer | Shinkawa Electric Co., Ltd. |
| System Compatibility | Shinkawa VM Series Vibration Monitoring Systems |
| Input Signals | Eddy-current proximity transducers, seismic vibration sensors, phase marker inputs |
| Measured Variables | Shaft vibration, axial displacement, phase mark (speed/eccentricity) |
| Signal Processing | High-precision analog conditioning with digital threshold processing |
| Alarm Outputs | Relays for Alert (Warning) and Danger (Trip) conditions |
| Isolation | Channel-to-system electrical isolation |
| Power Supply | Backplane powered via VM rack unit (typically 24V DC / ±15V DC) |
| Mounting Format | Plug-in card for VM series system chassis |
Core Advantages & Product Features
High-Precision Signal Processing: Processes high-frequency vibration and micro-inch displacement signals with minimal drift and fast response times.
API 670 Compliant Architecture: Designed to meet international rotating machinery protection guidelines for critical plant assets.
Dual-Stage Alarm Logic: Independent Alert and Danger trip thresholds prevent false trips while ensuring rapid machine shutdown during catastrophic events.
Continuous Sensor Health Monitoring: Built-in OK circuit continuously checks transducer cable integrity and power levels, flagging sensor wire breaks or driver failures instantly.
Industrial Noise Rejection: Shielded circuitry and passive filtering protect against high electromagnetic interference (EMI) typical of power generation environments.
Model Classification
LCU-37: Core local control / signal processing unit module.
LCU-44B-06: Advanced local control unit variant for high-density multi-channel racks.
VK Series (VK-202A / VK-452A): Non-contact eddy-current displacement sensors used in conjunction with LCU modules.
VM-5 / VM-7 Series: System backplane racks and chassis housing LCU control cards.
Environmental Tolerance Conditions
Operating Temperature: 0°C to +65°C (32°F to 149°F)
Storage Temperature: -30°C to +85°C (-22°F to 185°F)
Relative Humidity: 5% to 95% RH (Non-condensing)
Vibration Resistance: Conforms to IEC 60068-2-6 standard for industrial control cabinets
Protection Rating: IP20 (Requires mounting inside an IP54 or higher control enclosure)
Installation Method
Power Down: Disconnect power from the main VM rack system before card insertion or removal.
Rack Alignment: Slide the LCU-37 module along the designated slot guides in the VM chassis until the rear multi-pin connector fully seats into the backplane.
Card Retention: Tighten top and bottom front-panel thumbscrews to lock the card against cabinet vibration.
Sensor Cabling: Route transducer wiring through dedicated shielded cable channels, grounding the cable shield braid at the rack chassis ground terminal only.
Operating Instructions
Initial Zero & Span Adjustments: Calibrate sensor inputs using standard calibration procedures after replacing transducers or cable runs.
Threshold Configuration: Set Alert and Danger alarm setpoints according to equipment OEM vibration tolerance limits.
System Status Monitoring: Routinely verify front-panel LED indicators (OK / ALERT / DANGER) during daily operator inspection rounds.