Description

KONGSBERG MRU-E-JB1 Motion Reference Unit (MRU)
KONGSBERG MRU-E-JB1 is the wiring box/sensor assembly of the fourth-generation MRU-E series produced by Kongsberg Seatex, used for maritime dynamic positioning (DP), motion compensation and attitude measurement. JB1 is the corresponding wiring box model.

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Core Specifications
Brand: KONGSBERG (Consignor)
Model: MRU-E-JB1 (MRU-E-JB 1)
Type: Motion Reference Unit + Junction Box JB1
Attitude Accuracy: Roll / Pitch 0.03° RMS
Heave Accuracy: 5 cm / 5% RMS, period up to 25 s
Data Update Rate: 200 Hz (Real-time Control)
Operating Temperature: -25 ℃ ~ +70 ℃
Protection Level: IP65 (Waterproof and Dustproof)
Communication Interface: RS-232, RS-422, Ethernet
Input Voltage: 12–24 VDC (Typical 24 VDC)
Weight: Approximately 1.98 kg (Including Junction Box)
Material / Certification: Marine-grade aluminum alloy, with calibration certificate, compliant with IMO DP requirements

Key Features
High-precision Attitude Measurement: Three-axis Gyroscope + Accelerometer, output roll, pitch, heave, three-axis angular velocity / linear acceleration.
JB1 Junction Box: Designed for the fourth-generation MRU-E, integrates power supply, serial ports, I/O terminals; can directly be compatible with the fifth-generation MRU (but COM2 and analog output are unavailable).
Sturdy Maritime Design: IP65 Protection, resistant to vibration / impact, suitable for harsh environments such as ships, offshore platforms, FPSO, etc.
Arm Length Compensation: Supports two-point monitoring point configuration, suitable for motion compensation at different installation positions.
Plug-and-Play: Seamless integration with Kongsberg KPos DP, dynamic positioning system, sonar / depth sounder.
Typical Applications
Ship Dynamic Positioning (DP): Drilling vessels, FPSOs, supply ships, research vessels
Motion Compensation: Cranes, winches, radar / antenna stabilization
Offshore Platforms: Attitude monitoring, structural vibration analysis
Ocean Engineering: ROV/AUV navigation, seabed construction positioning
Surveying / Sonar: Depth meters, multi-beam, side-scan sonar motion compensation