The Kongsberg PSI-100 3C (Part Number: 37752771) is a specialized Gyro Syncro interface module designed for integration within Kongsberg Dynamic Positioning (DP) systems. It serves as a critical bridge between legacy synchro-based gyrocompasses and modern digital DP control architectures. By converting high-precision analog synchro signals into digital data, it ensures that the vessel’s heading information is accurately processed for station-keeping and automated navigation.

Technical Specifications and Datasheet

The following parameters define the operational profile of the PSI-100 3C module.

• Part Number: 37752771

• Model Number: PSI-100 3C

• Dimensions (H x W x D): Standard rack-mount PCB format, approx. 233 mm x 160 mm x 25 mm

• Weight: 0.52 kg

• Country of Origin: Norway (NO) / USA (US)

• Interface Type: 3-channel Synchro-to-Digital conversion

• Input Compatibility: Standard 3-wire synchro or 4-wire resolver signals

• DP System Compatibility: Kongsberg K-Pos, Simrad SDP, and legacy Alstom/Kongsberg architectures

• Power Requirement: Dedicated system backplane power (typically +5V / ±15V DC)

Application Fields

This module is essential in maritime environments where accurate heading data is the foundation of safety.

• Offshore Support Vessels (OSV): Providing heading input for DP2/DP3 station-keeping during cargo transfers.

• Drilling Rigs: Ensuring stable orientation during deep-sea drilling operations.

• Survey Vessels: Interfacing gyro data with hydroacoustic and subsea positioning sensors.

• Cruise and Commercial Shipping: Acting as a signal matching unit for bridge navigation systems.

Usage Instructions

To maintain the high integrity required for DP operations, follow these instructions:

1. Handling: The PSI-100 3C is highly sensitive to Electrostatic Discharge (ESD). Use grounded mats and wrist straps when removing the module from its protective packaging.

2. Installation: Power down the processing subrack before insertion. Slide the board into its designated slot until the DIN connectors engage fully with the backplane.

3. Signal Calibration: After installation, calibrate the synchro zero-point via the DP system’s engineering interface to ensure the digital heading matches the physical gyrocompass reading.

4. Environmental Care: Ensure the cooling fans in the electronics cabinet are functional, as signal conversion modules can generate localized heat during continuous operation.

Common Questions and Answers (Q&A)

Q: Can one PSI-100 3C handle multiple gyrocompasses? A: The “3C” designation typically refers to its 3-channel capability, allowing it to process multiple synchro inputs or provide redundant paths for a single high-integrity heading source.

Q: Is this board compatible with modern Fiber Optic Gyros (FOG)? A: Most modern FOGs use digital NMEA or Ethernet outputs. The PSI-100 3C is specifically used for interfacing older mechanical synchro gyros or resolvers that output analog voltages.

Q: What is the cause of a “Heading Telegram Timeout” on the DP console? A: This often indicates a communication failure between the PSI-100 3C and the main processor, or a loss of the reference AC voltage required for synchro signal excitation.

Q: Does the board require periodic recalibration? A: While the digital conversion is stable, the mechanical alignment of the source gyro should be checked annually during DP trials to ensure the synchronization remains accurate.

Related Model Recommendations

1. Kongsberg PSI-100 2C (2-channel version)

2. Kongsberg 37752770 PSI-100 (Standard interface board)

3. Kongsberg MRU-5 (Motion Reference Unit for DP)

4. Kongsberg RGC11 (Digital Gyro Control Unit)

5. Kongsberg 3855532 (Legacy Processor Interface Board)