Description
Product Overview
The SAM Electronics / Lyngsø Marine DEM 401 is a digital input module used in marine automation systems to collect discrete status signals from connected equipment. Typical digital input applications include contact states, equipment status, and alarm indications, depending on the installed system design. The module is associated with STN Atlas marine electronics and is identified in component listings by model DEM 401 and part number 271.130 432.
For maintenance teams, the key issue is matching the module to the existing installation rather than assuming every DEM 401 listing describes identical hardware. Available records associate the model with system number 962.004.600 and show variants such as 271.130 432.G, alongside other markings including 271.130 424 C and C6115. Treat these as identification clues, not proof that every listed variant is interchangeable. Check the complete part number, board revision, connector arrangement, and rack or system documentation before procurement.
During replacement, inspect the module for corrosion, damaged connectors, prior repairs, and signs of overheating. Request evidence of functional testing, particularly if the module serves alarm monitoring or machinery status functions. The exact input count, electrical thresholds, isolation characteristics, and operating limits for part number 271.130 432 have not been independently confirmed from a manufacturer datasheet, so those values should be verified before wiring or commissioning.
Product Introduction
The DEM 401 is intended for use as part of a marine control and monitoring architecture. It provides the interface for discrete signals that the wider automation system uses to determine equipment status and present relevant alarms or indications.
For spare-parts planning, retain photographs of the installed module label and terminal layout. These records help distinguish revisions and reduce the risk of receiving a physically similar but electrically unsuitable part. Confirm actual condition with supplier and request a test report where operational history is uncertain.
Key Technical Specifications
| Specification | Details |
|---|---|
| Product model | DEM 401 |
| Manufacturer / brand | STN Atlas / SAM Electronics / Lyngsø Marine |
| Part number | 271.130 432 |
| Related system number | 962.004.600 |
| Product type | Digital input module |
| Application | Marine automation, monitoring, and discrete status acquisition |
| Input channel count | Not independently verified |
| Input voltage / thresholds | Not independently verified |
| Communication interface | Not independently verified for this module |
| Connector type | Verify against the physical unit and installation documentation |
| Working temperature | Not independently verified |
| Protection rating | Not independently verified |
| Installation method | Confirm from the installed rack or system design |
| Operating accuracy | Not applicable as a conventional analog measurement specification; digital input thresholds require verification |
| Condition | Confirm actual condition with supplier |
DEM401 271.130 432
Related Products
These parts are associated with the same marine automation product family. Their functions differ, so they should not be treated as direct substitutes for the DEM 401.
- AEM 402 — Analog input module.
- DRM 401 — Digital relay module.
- REM 401 — Relay and input module.
- MXM 401 — Analog multiplexer module.
- ZM 411 — Gamma MICRO CPU module.
Frequently Asked Questions
Q1: What is the DEM 401 used for?
It is identified as a digital input module for marine automation systems, where discrete field signals can be collected for monitoring and control.
Q2: Is 271.130 432 the same as 962.004.600?
Listings associate both numbers with the DEM 401. Confirm the complete label and revision on the actual unit before treating them as matching identifiers.
Q3: Is the 271.130 432.G version interchangeable with 271.130 432?
The suffix appears in listings as a specific variant. Interchangeability should be confirmed against the manufacturer documentation and installed system requirements rather than inferred from the shared base number.
Q4: What is the module’s input voltage?
A reliable manufacturer specification for the exact 271.130 432 variant was not independently verified. Check the unit label, terminal drawings, and applicable system manual before connecting field signals.
Q5: What should be checked before ordering a replacement?
Verify the full part number and suffix, any additional board or type markings, connector layout, mounting arrangement, and compatibility with the existing marine automation system.
Q6: How should a used DEM 401 be evaluated?
Inspect for corrosion, heat damage, connector wear, and repair history. Request a documented functional test and confirm which functions were tested; a visual inspection alone does not establish operational condition.
Q7: Can the DEM 401 be replaced with a REM 401?
Do not assume so. The REM 401 is described as a relay and input module, while the DEM 401 is a digital input module. Their functions and electrical interfaces differ, so any substitution requires explicit system-level compatibility confirmation.
