STN Atlas AEM402 (271.138714) Analog Input Module Overview

Brand Background

STN Atlas Elektronik (historically associated with Atlas Elektronik and later integrated within marine automation portfolios such as Lyngsoe Marine) is a renowned German engineering brand specializing in advanced marine electronics, naval defense systems, ship automation, and industrial control equipment. Their hardware systems are engineered for extreme durability, precise signal acquisition, and long-term operating continuity under harsh maritime and industrial environments worldwide.

AEM402

Model Overview: AEM402 (Part Number: 271.138714)

The STN Atlas AEM402 (Catalog / Part Number: 271.138714, including related suffix variants such as 271.138714/B or 271.139714) is a specialized Analog Input Module designed for integration into sophisticated marine automation and industrial control architectures.

Serving as an essential signal-conditioning and data-acquisition node, the AEM402 module is engineered to accept continuous analog sensor inputs (such as temperature, pressure, level, or flow measurements), convert them into precise digital values, and transmit the data securely to central processing units or monitoring racks. It ensures high measurement accuracy and reliable signal processing within complex automation networks.

Key Technical Specifications and Parameters

• Manufacturer: STN Atlas Elektronik / Lyngsoe Marine

• Model Name / Designation: AEM402

• Part / Catalog Number: 271.138714 (variants include 271.138714/B, 271.139714/D, 271.138714/E)

• Product Type: Analog Input Module / Signal Acquisition Card

• Signal Processing: Multi-channel analog input conditioning for continuous voltage, current, or resistance sensor inputs

• System Integration: Compatible with proprietary STN Atlas and Lyngsoe Marine automation bus architectures and rack sub-assemblies

• Diagnostic Features: Integrated status indicators for real-time channel monitoring and operational health feedback

• Form Factor: Modular circuit board assembly engineered for secure installation in industrial control racks and marine automation cabinets

Operating Industries

The STN Atlas AEM402 analog input module is deployed primarily across maritime sectors, offshore infrastructure, and heavy industrial automation environments utilizing legacy STN Atlas control ecosystems:

• Commercial Maritime & Shipping: Cargo vessels, container ships, tankers, and passenger liners equipped with centralized ship control and monitoring systems (SCMS).

• Naval Defense & Marine Engineering: Shipboard automation networks, propulsion supervision systems, and auxiliary machinery monitoring panels.

• Offshore Oil & Gas: Floating production storage and offloading (FPSO) units, drilling rigs, and offshore platform auxiliary monitoring systems.

• Industrial Process Control: Heavy industrial automation plants utilizing high-reliability data acquisition hardware.

Common Usage Scenarios

1. Marine Machinery Monitoring and Alarm Systems

   Acquiring real-time analog data from engine room sensors—such as exhaust temperatures, lube oil pressures, cooling water levels, and fuel flow rates—to feed central monitoring displays.

2. Environmental and Tank Level Sensing

   Processing continuous signals from ballast tanks, fuel storage containers, and draught sensors to ensure vessel stability and safety compliance.

3. Propulsion and Auxiliary Plant Supervision

   Gathering critical analog feedback signals from heavy marine generators, compressors, and pumps to maintain optimal operational performance.

4. Control System Hardware Maintenance and Retrofits

   Serving as a direct replacement component during routine service, system troubleshooting, or legacy marine automation hardware overhauls to restore full data acquisition capability.