Description
Core Product Summary
The SAM Electronics MXM402 (also identified under Lyngso Marine part numbers 271.130.442/F and 962.004.300) is a marine-grade signal multiplexer module engineered for shipboard automation, engine monitoring, and alarm control systems. Designed to route and consolidate field sensor inputs, the module multiplexes multiple analog and discrete signal channels for transmission to central processing units and main automation controllers.
Constructed for high-reliability marine environments, the MXM402 operates on a nominal 24 VDC power supply and features a compact DIN rail mount chassis. The module incorporates built-in signal isolation to prevent ground loops and cross-talk between sensor circuits, facilitating integration across vessel monitoring panels, cargo control racks, and engine room automation suites.
Key Technical Specifications
| Technical Parameter | Specification Detail |
| Brand / Manufacturer | SAM Electronics / Lyngso Marine A/S |
| Model Number | MXM402 (MXM 402) |
| Part / Type Numbers | 271.130.442/F / 962.004.300 |
| Module Type | Marine Signal Multiplexer Module |
| Operating Voltage | 24 VDC (nominal supply) |
| Signal Channels | Multi-channel multiplex input groups |
| Signal Compatibility | Analog current signals (0–20 mA / 4–20 mA) and discrete digital contacts |
| Mounting Format | Standard European DIN rail mounting (125.4 mm D x 216 mm W x 68 mm H support unit) |
| Field Wiring Interface | Screw terminal blocks for direct conductor connection |
| Isolation & Protection | Galvanic signal isolation, IP20 internal cabinet protection rating |
| Operating Temperature | -20 °C to +70 °C |
Engineering Selection Highlights
- Marine Automation Architecture Fit: Designed specifically for SAM Electronics and Lyngso Marine vessel control systems, serving as dedicated hardware for signal routing and sensor loop consolidation.
- Galvanic Circuit Isolation: Provides channel-to-channel and input-to-bus isolation to eliminate ground loop interference on marine power and sensor distribution networks.
- Physical Keying & DIN Rail Mounting: Fits standard European DIN rails using a dedicated support base module, enabling structured layout inside main control desks and auxiliary cabinets.
- Terminal Strip Interface: Utilizes screw-terminal connections for direct field wiring, simplifying installation, signal tracing, and maintenance during routine vessel inspections.
- Industrial Environmental Tolerances: Rated for broad ambient operating temperatures (-20 °C to +70 °C) and constructed to withstand continuous shipboard vibration, humidity, and salt mist conditions.
MXM402
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
| Control System Platform | Lyngso Marine / SAM Electronics Integrated Automation Systems (IAS), MCS, and Engine Alarm Systems | Module routes input signals directly to central automation processor racks. |
| Expansion Capability | Compatible with AEM / MxIM expansion modules | Allows system designers to increase field input channel density on a shared backplane support base. |
| Power Supply | Regulated 24 VDC marine power supply | Ensure supply voltage stays within standard operational tolerances for cabinet instrumentation. |
| Field Wiring | Shielded twisted-pair signal cabling for analog loops | Drain wires and shielding must connect directly to designated cabinet grounding points. |
Dimensions, Mounting & Connection Notes
- Physical Dimensions: Support base dimensions measure 125.4 mm (D) x 216 mm (W) x 68 mm (H).
- Mounting Method: Engages onto standard European DIN mounting rails inside enclosed marine control cabinets.
- Field Terminal Layout: Features 8 dedicated terminal strip groups along the module body for direct connection of field sensor leads.
- Enclosure Installation: Rated IP20, requiring installation within a protected NEMA/IP-rated enclosure or console desk to prevent dust and water ingress.
Detailed Product Overview
The SAM Electronics MXM402 (Lyngso Marine) is a specialized marine signal multiplexer module developed for vessel monitoring, engine control, and alarm automation networks. Built to meet the rigid demands of commercial shipboard environments, the module acts as a signal-conditioning interface between field-mounted process sensors and centralized vessel control computers.
Structurally housed on a DIN rail support base, the MXM402 accepts multiple analog and discrete contact inputs via integrated screw-terminal strips. The internal logic handles signal multiplexing while applying channel-to-channel isolation, preventing ground loops and signal degradation common in complex shipboard electrical systems. The hardware is designed to operate under wide temperature variations, continuous engine vibration, and marine atmospheric conditions.
When replacing or specifying an MXM402 unit, matching the exact manufacturer type numbers (such as 271.130.442/F or 962.004.300) ensures compatibility with existing backplane assemblies, terminal assignment drawings, and system firmware configurations.
Applications & System Role
The SAM Electronics MXM402 sits at the field interface layer of marine automation and monitoring architectures. Installed within engine room control cabinets, cargo control consoles, or auxiliary machinery spaces, it gathers signals from distributed temperature sensors, pressure transmitters, level switches, and contact alarms.
By multiplexing these individual physical inputs into consolidated communication paths, the MXM402 reduces field cable runs between remote machinery spaces and the main control room, providing central alarm processing units with reliable real-time operational data.
FAQ
What is the primary function of the SAM Electronics MXM402?
The MXM402 is a marine signal multiplexer module designed to collect multiple analog and digital sensor inputs and route them to central vessel automation and alarm monitoring systems.
Which system manufacturers utilize the MXM402 module?
It is manufactured for SAM Electronics and Lyngso Marine vessel automation systems, engine alarm platforms, and machinery monitoring consoles.
What are the main part numbers associated with this model?
Common cross-reference identifiers include SAM / Lyngso Marine numbers 271.130.442/F and 962.004.300.
What power supply is required for operation?
The unit operates on a standard nominal 24 VDC supply voltage.
How is the module physically mounted inside a control cabinet?
The MXM402 mounts directly onto standard European DIN rails using its dedicated support housing.
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