The SM-Electrics NMEA Expansion Module (NMEA 210.24.0.0) is a marine electronics component that provides additional NMEA serial communication ports for SM-Electrics alarm and monitoring systems, particularly Bridge Navigational Watch Alarm Systems (BNWAS). It enables these systems to interface with other NMEA-compatible bridge equipment like Voyage Data Recorders (VDRs) and Central Alarm Management systems, facilitating essential data exchange and system integration on vessels.
Technical Specification
Inferred Technical Specifications:
- Model Name: NMEA Expansion Module
- Part Number (Common variations): NMEA 210.24.0.0 (often associated with PCB numbers like PCB10002.3, PCB10002.4, PCB10002.5)
- Purpose: Provides additional NMEA serial interfaces for marine alarm and monitoring systems (e.g., BNWAS).
- Compatibility: Designed for integration with SM-Electrics “le guardian 2025” BNWAS system (and likely other compatible SM-Electrics marine systems).
- NMEA Standard: Likely supports NMEA 0183 (IEC 61162-1 and potentially IEC 61162-2 for higher baud rates). NMEA 2000 is a different standard and would require a gateway if supported.
- NMEA Ports:
- Type: Likely RS-422 differential outputs/inputs for robust communication in a noisy marine environment.
- Number of Ports: This module’s primary function is “expansion,” so it would provide multiple NMEA input/output ports. The exact number isn’t specified, but typically, these modules offer 2, 4, or more configurable ports.
- Baud Rates: Configurable baud rates for NMEA 0183 (e.g., 4800, 38400, etc.) to match connected devices.
- Power Supply:
- Voltage: 24 VDC nominal (common for marine systems).
- Operating Voltage Range: Likely a wider range, e.g., 19.2 VDC to 28.8 VDC, to accommodate ship’s power fluctuations.
- Certifications/Approvals:
- MED Type Approved (“Wheel Mark”): Essential for marine equipment, indicating compliance with the Marine Equipment Directive.
- Compliance with relevant IEC standards:
- IEC 62616 (BNWAS standard)
- IEC 61162-1 (NMEA 0183 standard)
- IEC 60945 (General requirements for marine navigation and radiocommunication equipment and systems)
- Physical Characteristics:
- Mounting: Likely designed for DIN rail mounting or flush mounting, typical for panel installations within a bridge or equipment room.
- IP Rating: Could vary, but likely IP23 (for indoor cabinet mounting) or higher if exposed to splashes (e.g., IP65).
- Dimensions: Compact, designed to fit within marine equipment enclosures.
- Features:
- Bi-directional NMEA data transfer.
- Integration with VDR (Voyage Data Recorder) for logging BNWAS data.
- Interface with BAM/CAM (Bridge Alert Management / Central Alarm Management) systems.
- Diagnostic indicators (e.g., LEDs) for power and NMEA activity.
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