Product Short Description
Product Overview
SAM MXM402 is a marine-grade signal multiplexer module manufactured by SAM Electronics (Lyngso Marine A/S). It serves as core signal routing hardware integrated within vessel automation and monitoring systems, multiplexing multi-channel analog and discrete sensor signals to main control units.
Description
Technical & Performance Parameters
- Part Number: 271.130.442.F
- Mounting Form: DIN rail pluggable module
- Signal Channels: 8 multiplex input groups, multi-channel terminals per group
- Signal Type: 0–20mA analog current signals, discrete digital contact signals
- Switching Mode: Break-before-make isolation switching
- Operating Voltage: 24V DC nominal supply
- Operating Temperature: -20°C ~ +70°C
- Mechanical Dimension: Standard marine DIN rail module size
- Protection Class: IP20 for internal cabinet installation
Functional Features
- Sequential multi-channel signal multiplexing to reduce wiring quantity between sensors and main controller
- Built-in signal isolation to suppress ground loop interference on shipboard power networks
- Fault status indicator LEDs for channel and power supply diagnosis
- Hot plug compatible in compliant marine control cabinets
- Designed to withstand marine vibration, humidity and salt fog environment
Working Principle
Internal solid-state switching matrix sequentially selects each input channel and routes measured signals to shared output bus. The module logic controls channel switching timing, and isolates each input channel to prevent cross-talk between different sensor loops. Multiplexed signals are transmitted to central marine automation controller for data acquisition and alarm processing.
Material & Structural Characteristics
- Green flame-retardant DIN rail plastic housing
- FR-4 industrial PCB with anti-corrosion surface treatment against salt mist
- Screw-type terminal blocks for field sensor wiring; multi-pin internal backplane connector
- Transparent protective cover over PCB assembly
Application Scenarios
Ship engine room monitoring systems, cargo tank level measurement, auxiliary machinery sensor signal collection, vessel safety alarm systems, offshore platform signal conditioning racks.
Installation Requirements
- Mount on standard 35mm DIN rail inside sealed marine control cabinet
- Maintain minimum 20mm vertical spacing between adjacent modules for heat dissipation
- All signal cable shielding must connect to module designated grounding terminal
Usage Precautions
- Do not install in direct splash zone; only use inside climate-controlled electrical rooms
- Regularly tighten terminal block screws to avoid loose connections under vessel vibration
- Avoid routing high-power motor cables parallel to low-level sensor signal wiring
- Perform periodic insulation resistance testing of input signal channels
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