Description

Product Overview

The NORIS SA653-1G is a CPU Slave PCB assembly for Noris marine engine monitoring and control systems, designed to work with the main master controller to process shaft speed and analog measurement data from on-engine sensors. This slave board receives pulse signals from magnetic speed pickups and converts raw measurements into digital communication data for the vessel’s alarm and monitoring system. It resolves signal processing bottlenecks and noise interference in high-vibration marine engine rooms, supporting continuous acquisition of crankshaft RPM, temperature and pressure values for main propulsion and auxiliary diesel engines. Marine automation engineers and vessel reliability teams rely on this spare PCB for repairing legacy Noris N3000 series monitoring systems. Edge connector plug-in installation enables quick replacement, and onboard diagnostic circuitry detects signal loss and board faults to shorten vessel downtime.

 

Technical Specifications

• Product Model: SA653-1G
• Brand: Noris
• Warranty: One Year
• Input Voltage: 24 V DC (18–32 V DC)
• Operating Temperature: -20 °C to 60 °C
• Storage Temperature: -40 °C to 85 °C
• Response Time: Fast pulse sampling and signal preprocessing
• Protection Class: Conformal coated PCB for marine cabinet environment
• Accuracy Class: Matched to Noris magnetic pickup speed sensors
• Output Frequency: Not applicable (slave CPU processing board)
• Rated Current Range: Low power logic consumption
• Communication Interface: Internal edge connector to master CPU board; sensor signal input terminals
• Supported Protocols: Noris internal marine system bus
• Overload Capacity: ESD surge suppression, input overvoltage protection, signal fault detection
• Dimensions: Compact PCB sized for Noris N3000 rack slot
• 

---

Application Scenarios

• Main Propulsion Diesel Engine Monitoring: This slave CPU board processes crankshaft speed pickup signals for cargo ship main engines. The SA653-1G delivers RPM data to the master controller and ship alarm system, supporting overspeed pre-alarm and shutdown protection logic.
• Auxiliary Generator Set Monitoring: Installed in engine control room racks, the board captures speed and temperature measurements from onboard diesel generators. It reports underspeed and over-temperature conditions to prevent generator blackout hazards.
• Thruster & Azimuth Drive Monitoring: The PCB processes shaft speed sensor signals for bow and stern thrusters. Conformal coating protects electronics from vibration, humidity and temperature swings typical in marine control cabinets.

---

Key Product Notes

SA653-1G is a slave CPU board compatible with Noris N3000 marine monitoring platform, paired with SA647 series speed transmitters and magnetic pickups. It is a discontinued marine spare component, stocked for vessel maintenance and overhaul. ESD safety procedures must be followed during PCB replacement; verify connector sealing and sensor cable shielding to avoid EMI-induced signal corruption in engine room environments.