Nabtesco GCB-101-02 Ship Diesel Engine Electronic Speed Control System

Product Description

Nabtesco (NABCO) GCB-101-02 is the main PCB control board for MG-800II marine main engine electronic governor system, the core control card of Nabtesco marine governor. This printed circuit board integrates CPU, speed signal acquisition, PID calculation, drive output, fault diagnosis and alarm circuits. It receives signals from engine speed pickups and bridge command signals, executes governor PID algorithm and outputs control signals to drive actuator to regulate speed and load of marine main diesel engine. It provides self-diagnosis and alarm for overspeed, signal loss and power failure. It supports governor parameter configuration and local commissioning. As the core processing unit of MG-800II electronic governor system, it complies with marine classification society requirements and fits large 2-stroke marine main engines.

Specifications

• Model: GCB-101-02
• Brand: Nabtesco (NABCO)
• System: MG-800II Marine Diesel Engine Electronic Governor System
• Functions: Governor PID calculation, speed acquisition, command processing, fault diagnosis, alarm output
• Power Supply: DC 24V (marine standard DC supply)
• Input Signals: Pulse signal from speed sensor, bridge speed setpoint, actuator feedback signal
• Output: Actuator drive control signal, relay dry contact for alarm
• Communication: Internal bus communication with other MG-800II system boards
• Type: PCB card, rack plug-in mounting
• Operating Temperature: 0℃ ~ +60℃
• Storage Temperature: -20℃ ~ +70℃
• Relative Humidity:5%~95%, non-condensing, salt mist resistant for engine room
• Vibration: Compliant with marine vibration & shock standard
• Certifications: Major marine classification society approvals (DNV, LR, NK etc.)
• Weight: approx. 0.45kg
• Features: Built-in PID governor algorithm, real-time self-diagnosis, speed protection interlock, configurable parameters, salt mist & EMI resistance

Application

Designed for Nabtesco MG-800II marine main engine electronic governor system, applied to large 2-stroke main propulsion diesel engines on ocean-going cargo vessels, tankers and bulk carriers. It measures actual engine speed, compares with bridge speed setpoint and automatically adjusts fuel actuator to stabilize engine speed and control output power. It continuously monitors governor loop faults and triggers alarm & protection interlock. Integrated into marine engine remote control system for constant-speed sailing, acceleration/deceleration and load control, serving as the critical control component for marine main engine speed regulation and protection.

Series Models (MG-800II Governor System Boards)

1. GCB-101-02: MG-800II Main Governor Control Board
2. GCB-102: MG-800II Speed Interface Board
3. GCB-103: Actuator Driver Board
4. GCB-104: Power Interface Board
5. GCB-105: Alarm Terminal Board
6. MG-800: Original MG800 full governor controller
7. MCG-771: New generation Nabtesco marine electronic governor controller