The Kongsberg ASSY 37913068 is a high-precision Analog Input (AI) board engineered specifically for the K-Chief 600 and AutoChief marine automation systems. As a critical hardware component within the Kongsberg Maritime ecosystem, this board facilitates the interface between a ship’s physical sensors—measuring parameters such as temperature, pressure, tank levels, and fuel flow—and the centralized control system.
Kongsberg Maritime is renowned for its “Subsea to Space” technology, and the 37913068 board exemplifies the ruggedness required for deep-sea environments. It is designed to withstand the high-vibration, high-humidity, and wide-temperature fluctuations common in engine rooms and technical compartments of LNG carriers, offshore vessels, and cruise ships.
Product Introduction
The ASSY 37913068 functions as a signal processing hub. In marine automation, data integrity is paramount; a false reading on an oil pressure sensor could lead to an unnecessary engine shutdown or, worse, a catastrophic failure. To prevent this, the 37913068 utilizes advanced analog-to-digital conversion (ADC) technology and robust galvanic isolation.
The board is typically part of a modular I/O station (distributed processing unit). It receives raw current or voltage signals from field instruments, filters out electrical noise generated by heavy shipboard machinery, and digitizes the data for transmission over the system’s redundant process network. Its “Assy” (Assembly) designation indicates that it is a complete, multi-component circuit board, often featuring a protective coating (conformal coating) to prevent corrosion from saline air.
Product Parameters (Datasheet)
The following parameters define the technical operational profile of the 37913068 module:
| Parameter | Specification |
| Model Number | ASSY 37913068 |
| Board Category | Analog Input (AI) |
| Input Channels | 8 or 16 Channels (Depending on firmware/configuration) |
| Signal Input Types | 0-10V, 4-20mA, 0-20mA (Configurable per channel) |
| A/D Resolution | 16-bit |
| Accuracy | ±0.1% of full scale at 25∘C |
| Sampling Rate | ≤100 ms for all channels |
| Galvanic Isolation | 500V AC (between inputs and internal logic) |
| Power Supply | +24V DC nominal (provided by the backplane) |
| Power Consumption | Typical 3.5 Watts |
| Operating Temperature | −15∘C to +70∘C |
| Vibration Resistance | Meets IACS E10 standards for marine equipment |
| Communication Bus | Proprietary Kongsberg I/O Bus / CAN-based |
Technical Description & Operational Logic
The ASSY 37913068 is designed for High Availability. In Kongsberg’s distributed architecture, each I/O board possesses a degree of local intelligence.
- Signal Conditioning: The board features integrated low-pass filters that eliminate high-frequency interference caused by VFDs (Variable Frequency Drives) and thruster motors.
- Loop Monitoring: One of the most vital features of the 37913068 is its ability to detect “Open Loop” and “Short Circuit” conditions. If a sensor wire is severed, the board immediately flags the input as “invalid” to the controller, preventing the automation logic from acting on a 0mA signal as if it were a legitimate process value.
- Configurable Ranges: Using the Kongsberg K-Safe or K-Chief configuration software, each input can be individually scaled. For example, Channel 1 could be set to 4-20mA for a pressure transmitter, while Channel 2 is set to 0-10V for a valve position feedback.
- Redundancy Support: The board is compatible with redundant I/O configurations. In mission-critical systems like Dynamic Positioning (DP), two boards can be paired so that the failure of one does not result in the loss of sensor data.
Country of Origin
- Primary Origin: Norway. (Manufactured at Kongsberg Maritime’s specialized facilities in Horten or Kongsberg, Norway).
Product Related News (2025-2026)
In the current maritime landscape of 2025 and 2026, the ASSY 37913068 has become central to the “Green Corridor” initiatives. As ships transition to alternative fuels like ammonia and hydrogen, the monitoring requirements have become significantly more stringent.
Recent news from Kongsberg Maritime highlights the integration of these legacy-compatible analog boards with the new “K-Smart” cloud-based ecosystem. By utilizing the 37913068 as a data gateway, older vessels can now upload real-time engine performance data to shore-based centers for fuel optimization and emissions reporting without requiring a full control system overhaul. This “bridge-to-cloud” capability has made the 37913068 a high-demand item for dry-dock refits. Furthermore, Kongsberg has recently updated the firmware for this board series to enhance cybersecurity, ensuring that the analog-to-digital conversion process is shielded from unauthorized “packet injection” at the I/O bus level.
Installation & Maintenance Guidelines
- ESD Safety: Always handle the 37913068 in an anti-static environment. The high-density ICs on the board are sensitive to static discharge.
- Mounting: Ensure the board is firmly seated in its rack slot. In marine environments, vibration can cause “contact fretting.” Periodically check that the retaining screws or clips are secure.
- Shielding: To maintain the 16-bit accuracy, sensor cables must be shielded. The shield should be grounded at the I/O station terminal rail to prevent noise loops.
- Calibration: While the board is factory-calibrated, it is best practice to perform a “Loop Check” during annual surveys. This involves using a signal simulator (0-20mA) to verify that the HMI displays the correct corresponding value.
Recommended Related Kongsberg Maritime Models
If you are maintaining or upgrading a Kongsberg system, the following related boards and modules are frequently used alongside the 37913068:
- ASSY 37913069 (Digital Input Board): The digital counterpart, used for monitoring binary signals like high-level alarms and pump status.
- ASSY 37913070 (Digital Output Board): Used for driving relays and solenoid valves.
- RB-Bus / R-Bus Modules: The communication modules that link the I/O boards to the main processing units.
- DPU (Distributed Processing Unit): The specialized “brain” that houses the 37913068 board in a ruggedized enclosure.
- K-Chief 600 Operator Station: The HMI system where the data from the 37913068 is visualized for the crew.
- ASSY 379123xx Series: Earlier generations of I/O boards found in K-Chief 500 systems, which may require adapters for modern upgrades.
