KONGSBERG GLK-300-CLS Signal Processing Unit

1. Product Description

The GLK-300-CLS is a marine-certified signal processing unit developed by KONGSBERG, matched with KM marine automation control system. It is specially optimized for CLS (Cable Level Sensor) signal acquisition and conversion, designed for harsh marine and offshore industrial environments. The unit adopts compact DIN rail mounting structure, built-in signal isolation circuit, supports multi-channel analog level signal input, converts weak sensor signals into standard bus signals for upper RCU controller transmission, and complies with DNV marine safety certification standards.

2. Core Product Functions

• Multi-channel CLS cable level sensor signal conditioning, filtering interference noise from marine cables
• Analog signal amplification, isolation and conversion into standard RBUS bus communication data
• Real-time liquid level value calculation, signal breakpoint and short-circuit self-diagnosis
• Fault alarm upload: report sensor disconnection, signal overload, module power failure to main control unit
• Galvanic isolation between sensor field circuit and control bus to eliminate electromagnetic interference on vessels
• Hot-swap support, no system shutdown required for module replacement and maintenance
• Parameter calibration function via KM system software for different type CLS sensors

3. Application Scenarios

• Ballast tank liquid level monitoring for cargo ships, bulk carriers and oil tankers
• Offshore FPSO, drilling platform storage tank level measurement system
• Marine sewage tank, fresh water tank, fuel oil tank CLS sensor signal processing
• Vessel liquid level remote monitoring and automatic tank gauge (ATG) system
• Dynamic positioning auxiliary liquid level signal collection for marine automation system

4. Common Troubles & Issues

• Abnormal Liquid Level Readings & Signal Drift

  Cause: Uncalibrated CLS sensor, damaged signal cable shielding, strong electromagnetic interference nearby. Solution: Re-calibrate sensor parameters, replace shielded cables and reinforce cabinet grounding.

• Sensor Breakpoint Fault Alarm Persists

  Cause: Loose terminal wiring, broken CLS probe cable, sensor internal failure. Solution: Check wiring continuity, test sensor resistance and replace faulty level sensor.

• GLK-300-CLS Cannot Communicate with RCU Controller

  Cause: Wrong module RBUS address, insufficient bus power, incompatible KM system firmware. Solution: Reset module address, check bus power supply and upgrade matching controller firmware.

• Module Power Failure & No Response

  Cause: Input voltage overload, internal power circuit burnout, loose power terminals. Solution: Measure input voltage, re-tighten power wiring and replace damaged module if circuit burned.

• Intermittent Signal Loss Under Vessel Vibration

  Cause: Loose terminal blocks, poor cable fixation, aging internal circuit solder joints. Solution: Lock all wiring terminals, fix signal cables with cable ties and inspect internal soldering points.