Description
Product Overview
The STN Atlas / Lyngsø Marine DRM 401 is a digital relay module used in marine automation systems to interface control-system logic with relay-operated field circuits. In a shipboard monitoring and control installation, relay outputs may be used for configured equipment commands, status-related functions, or alarm interfaces. The actual function of each output depends on the vessel’s wiring diagrams and system configuration; the module should not be assumed to have a particular number of channels or relay contact rating without the applicable technical documentation.
The DRM 401 is associated with the GEAMAR 120 ISL integrated monitoring and control system. Available installation documentation lists the module as operating from a 24 VDC system supply, with approximately 350 mA current consumption, equivalent to 8.5 W. These values are useful for preliminary identification and power-budget checks, but the installed system manual and the actual module label should take precedence when planning a replacement.
For maintenance and procurement, verify the complete part number and suffix. Listings identify variants such as 271.130 433/C and 271.130 433/D, and associate the DRM 401 with Lyngsø Marine part number 962.004.800. These identifiers should be checked against the existing module, connector arrangement, and installation records before substitution. A used module should be evaluated for relay operation, terminal condition, corrosion, and evidence of previous repairs. Request documented functional testing rather than relying on a visual inspection alone.
Product Introduction
The DRM 401 provides relay-based interfacing within a marine automation architecture. It is intended for system-specific control applications, so replacement planning should account for both the electrical characteristics of the module and the purpose of the connected circuits.
Before commissioning a replacement, confirm the supply voltage, terminal assignments, relay contact ratings, output logic, and any required system configuration. Do not connect field loads until the relevant ratings and wiring have been verified.
Key Technical Specifications
| Specification | Details |
|---|---|
| Product model | DRM 401 |
| Manufacturer / brand | STN Atlas / Lyngsø Marine |
| Part number | 271.130 433 |
| Related part number | 962.004.800 |
| Product type | Digital relay module |
| System association | GEAMAR 120 ISL marine monitoring and control system |
| Supply reference | 24 VDC |
| Listed current consumption | Approximately 350 mA |
| Listed power consumption | Approximately 8.5 W |
| Terminal type | Screw terminal blocks reported; verify exact revision |
| Relay channel count | Not independently verified |
| Relay contact ratings | Not independently verified |
| Communication interface | Not independently verified |
| Operating temperature | Not independently verified |
| Protection rating | Not independently verified |
| Installation method | Confirm against the existing system and mounting arrangement |
| Condition | Confirm actual condition with supplier |
DRM401 271.130 433
Related Products
These components are associated with the same marine automation equipment family, but they serve different functions and are not automatically interchangeable.
- DEM 401 — 271.130 432: Digital input module for collecting discrete field signals.
- REM 401 — 271.123 854: Relay and input module.
- MXM 401 — 271.130 436: Analog multiplexer module.
- AEM 402 — 271.138 714: Analog input module.
- ZM 411 — 271.149 319: CPU module listed for the GEAMAR 120 ISL system.
Frequently Asked Questions
Q1: What is the DRM 401 used for?
It is a digital relay module used in marine automation and monitoring systems to provide relay-based interfaces for configured control functions.
Q2: What is the difference between DRM 401 and DEM 401?
The DRM 401 is a digital relay module, while the DEM 401 is a digital input module. Their electrical functions differ, so one should not be substituted for the other without explicit system-level approval.
Q3: What is the power requirement for the DRM 401?
Available GEAMAR 120 ISL documentation lists a 24 VDC supply and approximately 350 mA consumption, or 8.5 W. Confirm the exact installed version and power requirements before energizing it.
Q4: Is 271.130 433 the same part as 962.004.800?
Listings associate both numbers with the DRM 401. Check the full markings and any revision suffix on the existing unit to confirm the replacement match.
Q5: Are versions 271.130 433/C and 271.130 433/D interchangeable?
That cannot be established from the shared model name alone. Compare hardware revisions, terminal assignments, relay specifications, and system documentation before replacing one version with another.
Q6: What should be verified before purchasing a used unit?
Confirm the complete part number, revision, physical condition, relay operation, terminal integrity, and documented test results. Also establish whether the supplier has tested the actual unit under operating conditions.
Q7: Is the DRM 401 still manufactured?
A distributor listing describes the DRM-401 as discontinued by the manufacturer. This is secondary-source information, so verify current lifecycle status with the manufacturer or an authorized technical contact.
