The Kongsberg RAi-16 is a high-precision data acquisition module designed for the maritime and offshore automation sectors. Functioning as a critical node within the K-Chief and AutoChief vessel management systems, this Remote Analog Input (RAi) unit facilitates the accurate conversion of analog field signals into digital data. Built to withstand vibration, humidity, and temperature fluctuations, it ensures consistent performance for mission-critical shipboard operations.

 

Product Overview and Technical Specifications

The RAi-16 provides sixteen channels of analog connectivity, offering a robust interface for a wide variety of industrial transmitters. It emphasizes signal integrity and galvanic isolation to protect the wider control network from field-side electrical interference.

Technical Datasheet

• Product Name: Kongsberg RAi-16 Remote Analog Input Module
• Number of Channels: 16 Analog Inputs
• Signal Ranges: 4-20 mA, 0-10 V DC, 0-5 V DC
• Dimensions: 144 mm x 42 mm x 110 mm
• Weight: 0.62 kg
• Country of Origin: Norway
• Resolution: 12-bit to 16-bit (Software dependent)
• Operating Voltage: 24V DC (+/- 20%)

Application Fields

The Kongsberg RAi-16 is a standard component in numerous marine control scenarios:

• Engine Telegraph Systems: Capturing precise lever positions and feedback signals.
• Tank Level Gauging: Integrating ultrasonic or pressure-based level transmitters.
• Machinery Monitoring: Collecting temperature and pressure data from pumps, compressors, and purifiers.
• Bridge Systems: Interfacing with navigational sensors that output standard analog signals.

 

Product Instructions

Mount the RAi-16 module onto a standard DIN rail within a cabinet that meets the required ingress protection (IP) rating for the installation area. Connect the field wiring to the terminal blocks, ensuring that signal shields are properly grounded at the cabinet entry point to prevent noise. Before commissioning, verify that the module’s hardware address (Node ID) is uniquely set via the onboard rotary or DIP switches. During software setup, map each of the 16 channels to the corresponding variable in the control logic. Always ensure the power supply is stable, as voltage drops can affect the accuracy of the analog-to-digital conversion process.

 

Q&A: Frequently Asked Questions

Q: What is the difference between the RAi-16 and the RAi-16xe? A: While both handle 16 analog inputs, the “xe” version typically features enhanced processing speed, updated communication hardware, and improved diagnostic capabilities for newer generations of Kongsberg systems.

Q: Can this module detect a broken wire? A: Yes, when configured for 4-20 mA signals, the module can identify a “low current” condition (typically below 3.8 mA) as a wire break or sensor fault and trigger a system alarm.

Q: Is the RAi-16 hot-swappable? A: Hot-swapping is generally supported if the module is mounted on a compatible active backplane, allowing for replacement without interrupting the power to other modules in the same rack.

 

Recommended Similar Models

For different I/O counts or specialized signal processing within the Kongsberg range, consider these alternatives:

1. Kongsberg RAi-16xe: The advanced version with enhanced diagnostic features.
2. Kongsberg RDi-32: A 32-channel digital input module for binary signal monitoring.
3. Kongsberg RAo-8: A dedicated 8-channel analog output module for driving valves and governors.
4. Kongsberg RBP-01: The redundant backplane used to house and power RAi series modules.
5. Kongsberg RIO 200: A versatile remote I/O unit for smaller, localized control loops.