The Sperry Marine 03956-4802181 Network Serial Interface (NSI) is a vital component for marine integrated bridge systems. It acts as a gateway, converting serial data (e.g., NMEA 0183) from various ship sensors into a network-compatible format (e.g., Ethernet). Powered by 12-24Vdc, this robust unit enables seamless integration of legacy or specialized serial devices into modern networked navigation systems, ensuring critical data flow for enhanced situational awareness.
Technical Specification
General:
- Part Number: 03956-4802181
- Type: Network Serial Interface (NSI)
- Manufacturer: Sperry Marine (a brand of Northrop Grumman Corporation)
- Function: Converts serial data (e.g., NMEA 0183) to a network-compatible format (e.g., Ethernet) for use in Integrated Bridge Systems (IBS).
- Software Revision: Typically ships with Software Rev. B (or later compatible revisions), ensuring compatibility with Sperry Marine’s VisionMaster series and other systems.
Interfaces:
- Serial Ports: Multiple configurable RS-232/RS-422 serial input/output ports. The exact number can vary but typically several (e.g., 4-8) are available for connecting various sensors (gyro, GPS, speed log, echo sounder, AIS).
- Network Interface: Likely Ethernet (RJ45 port) for connection to the vessel’s internal bridge network (e.g., Sperry Marine’s VisionMaster Net).
- Data Protocols: Supports standard marine serial data protocols, primarily NMEA 0183 (IEC 61162-1/2), for communication with external devices.
- Configuration: Configurable via a connected computer (e.g., web interface or dedicated software tool) to define input/output sentences, baud rates, and network settings.
Electrical & Power:
- Input Voltage: 12 – 24 V DC (Direct Current)
- Power Consumption: Low, specific wattage often not publicly detailed but designed for continuous marine operation.
Physical & Environmental:
- Dimensions (Approximate):
- Length: Approx. 226 mm (8.90 inches)
- Width: Approx. 144 mm (5.67 inches)
- Height: Approx. 85 mm (3.35 inches)
- Note: These dimensions are for the R4 Transponder Unit in the previous example, which shares a similar form factor for marine electronic modules. The NSI will have comparable compact dimensions.
- Weight: Approximately 640 grams (0.64 kg / 1.4 lbs)
- Mounting: Designed for internal mounting within bridge consoles, equipment racks, or bulkheads.
- Ingress Protection (IP Rating): Typically IP21 (Protected from solid objects >12.5mm, and from vertically falling water drops), suitable for protected internal environments.
- Operating Temperature: -15°C to +55°C (Standard for marine bridge equipment)
- Storage Temperature: -25°C to +70°C
- Humidity: Up to 95% non-condensing
- Magnetic Compass Safe Distance: 1 meter (Ensures minimal interference with magnetic compasses).
Compliance:
- Designed to meet relevant international maritime standards for navigation equipment interfaces (e.g., IEC 60945 for general requirements, IEC 61162 series for digital interfaces).
- Typically part of systems that achieve Wheelmark (MED) approval.
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