Description
The Daihatsu Meiyo Electric Speed Switch (Part Number: MDP-REVD) is a precision digital rotation detector and speed relay engineered for marine diesel engines and heavy industrial rotating machinery. Manufactured jointly or in association with Meiyo Electric and Daihatsu Diesel, this unit processes frequency input signals from magnetic pickup sensors to monitor engine velocity, providing critical overspeed protection, alarm triggering, and process control feedback.
📋 Product Datasheet & Parameters
- 🔌 Product Type: Digital Speed Switch / Rotation Detector / Speed Relay
- 🏷️ Brand & Manufacturer: Daihatsu Diesel / Meiyo Electric Co., Ltd.
- 📦 Part Number / MPN: MDP-REVD (Series: MDP-REV Digital Speed Relay)
- ⚙️ Series Compatibility: Daihatsu marine auxiliary and propulsion diesel engine monitoring panels, Meiyo Electric safety alarm suites
- 🌍 Country of Origin: Japan
- 📏 Form Factor: Panel-mountable digital electronic controller housing
- ⚖️ Net Weight: Approximately 0.35 kg to 0.85 kg
- ⚡ Operating Voltage & Power: 24 VDC (Power Consumption: Approx. 3.2W)
- 🌐 Data Interface: Magnetic pickup pulse inputs, configurable contact outputs, and 4–20 mA analog retransmission output
- 🛡️ Operational Environment: Marine-grade ruggedized circuitry designed to withstand continuous engine-room vibration, thermal shifts, and humidity
❓ Frequently Asked Questions (Q&A)
- Q: What is the primary function of the MDP-REVD speed switch?
A: It monitors engine rotational speed via magnetic sensors, triggering instantaneous relay outputs for overspeed shutdown, rated speed detection, and startup sequencing to protect equipment from runaway or mechanical damage.
- Q: How are operational parameters configured on this model?
A: Unlike older analog relays, the MDP-REVD series utilizes front-panel digital programming keys and a 7-segment LED display to adjust parameters such as pulse counts, reduction gear ratios, and threshold set-points.
- Q: What safety precautions are required during installation or replacement?
A: System power (24 VDC) must be isolated prior to wiring or replacement. Standard electrostatic discharge (ESD) handling protocols should be observed when servicing internal rack elements.
🔍 Recommended Alternative Series & Models
- Meiyo Electric MDP-REV Standard Speed Relay Series
- Daihatsu Meiyo MD-8 Electronic Governor Controller
- Nabco Marine Electronic Governor Control Unit
- Woodward 2301A Speed Control and Load Sharing Module
- DEIF Engine Protection and Speed Switch Controller – MTR Series
- Kongsberg AutoChief Propulsion Control System Interface
- Wartsila UNIC Engine Safety and Speed Monitoring Card
- Heinzmann Digital Speed Governor Control Unit
- Siemens SIMATIC S7 Speed Monitoring and Pulse Processing Module
- ABB Industrial Tachometer and Overspeed Protection Relay
