The Kongsberg MSI-CL is a specialized communication interface module designed for the Kongsberg maritime automation ecosystem. Specifically engineered as a Current Loop (CL) interface, this module facilitates robust, long-distance serial communication between the central control system and peripheral devices or older legacy equipment. The current loop standard is favored in maritime environments for its high immunity to electrical noise and its ability to maintain signal integrity over significant cable lengths.

 

Product Overview and Technical Specifications

The MSI-CL serves as a bridge, converting standard logic signals into the current loop format. This ensures that data transmission remains stable even when routed through engine rooms or other areas with high electromagnetic interference (EMI).

Technical Datasheet

• Product Name: Kongsberg MSI-CL MSI- Current Loop Module
• Interface Type: 20mA Current Loop (Serial)
• Dimensions: 144 mm x 42 mm x 105 mm
• Weight: 0.55 kg
• Country of Origin: Norway
• Power Consumption: Typically < 2W
• Mounting: DIN Rail or specific Kongsberg carrier boards
• Indicators: Power and Data Transmission (TX/RX) LEDs

 

Application Fields

The Kongsberg MSI-CL is essential for integrating various marine subsystems:

• Legacy System Integration: Connecting modern K-Chief systems with older sensors or displays that utilize current loop interfaces.
• Long-Distance Telemetry: Facilitating communication with equipment located in remote parts of the vessel where RS-232 would be unreliable.
• Alarm Monitoring: Providing a stable link for remote alarm panels and local operator stations.
• Navigational Data Distribution: Interfacing with gyrocompasses or GPS units that output data in a current loop format.

 

Product Instructions

To install the MSI-CL, secure it to the designated mounting rail and ensure it is properly seated within the system’s communication rack. Wiring should be performed using high-quality shielded cables; the current loop circuit must be correctly identified as either “active” or “passive” depending on whether the MSI-CL or the connected device is providing the loop current. Configure the baud rate and parity settings through the Kongsberg system configuration tool to match the peripheral device. It is critical to ensure that the loop current is maintained at the standard 20mA to avoid data errors or hardware damage.

 

Q&A: Frequently Asked Questions

Q: Can the MSI-CL be used for RS-485 communication? A: No, the MSI-CL is specifically designed for the Current Loop electrical standard. For RS-485 requirements, a different MSI-series module or converter should be utilized.

Q: What is the maximum distance supported by this module? A: While results vary based on cable quality and environment, current loop interfaces like the MSI-CL can typically support distances up to 1000 meters or more, far exceeding the limits of standard RS-232.

Q: Do the LEDs indicate the health of the loop? A: The TX and RX LEDs flash during active data exchange, which helps in troubleshooting. If a LED remains solid or dark during expected communication, it may indicate a break in the loop or a configuration mismatch.

Recommended Similar Models

For other communication or interface needs within the Kongsberg K-Chief/AutoChief series, consider these options:

1. Kongsberg MSI-232: A dedicated RS-232 serial interface module.
2. Kongsberg MSI-485: A module designed for RS-422/485 multi-drop communication.
3. Kongsberg RIO 400: A high-capacity remote I/O unit for broader data acquisition.
4. Kongsberg C2 xe: The central processing unit that manages these communication modules.
5. Kongsberg PBI-11: A Profibus interface module for integrating third-party industrial networks.