Description
Core Product Summary (Brand / Model / Key Attributes)
The SAM Electronics SIM401 (also identified under Lyngso Marine part numbers such as 271.149.320 and 962.002.300 series) is a dual serial interface module for marine automation systems. It belongs to the Lyngso Marine / SAM Electronics product family used with Stellamar and MCS 2500 control systems and provides independent serial communication channels between the central automation network and external devices.
The module supplies two RS-232 channels and two RS-485 channels, operates from a 24 V DC supply, and uses green screw terminal blocks for power and data connections. Onboard jumpers support termination and addressing configuration. It is intended for integration of serial devices such as navigation sensors, governors, and monitoring equipment into shipboard alarm, monitoring, and control architectures.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product type | Dual serial interface module |
| Manufacturer | SAM Electronics / Lyngso Marine |
| Typical order / part numbers | 271.149.320 series, 962.002.300 series |
| Power supply | 24 V DC |
| Communication interfaces | 2 × RS-232 channels, 2 × RS-485 channels |
| Connections | Green screw terminal blocks (J1–J5) |
| Configuration | Jumpers for termination and module addressing |
| System context | Stellamar / MCS 2500 marine automation systems |
Detailed Product Overview
The SAM Electronics SIM401 functions as a dual-channel serial communication interface within Lyngso Marine / SAM Electronics ship automation platforms, particularly the Stellamar and MCS 2500 families. Its primary role is to connect the central automation bus to external serial devices that use standard RS-232 or RS-485 interfaces, enabling data exchange for monitoring, control, and navigation functions.
Each of the two serial channels operates independently, allowing simultaneous interfacing of different devices or protocols. Typical external equipment includes GPS receivers, AIS units, engine governors, tank gauging systems, and power-management controllers. The module therefore acts as a gateway that brings third-party serial data into the ship’s alarm and monitoring system or other control layers.
Power is supplied at the standard marine control voltage of 24 V DC. Field wiring is made via green screw terminal blocks that handle both power and serial signals. Jumpers on the board permit selection of termination resistors and module addressing so that the unit can be adapted to the specific bus configuration and network topology of the host system.
Physically the module is designed as a plug-in unit for the subracks used in MCS 2500 / Stellamar installations. Status indication is provided by LEDs that show power, transmit/receive activity, and fault conditions, assisting technicians during commissioning and fault finding. Because the channels are galvanically separated from the system bus in typical implementations, the module helps limit the propagation of electrical noise or ground-potential differences common in engine-room and bridge environments.
Selection of the SIM401 is driven by the need to expand serial connectivity inside an existing Lyngso Marine or SAM Electronics automation system rather than by standalone use. Correct channel configuration, matching baud rate and parity settings with the external device, and proper shield grounding of the serial cables are essential for reliable operation.
SIM401
SIM401
Engineering Selection Highlights
- Exact model match required for Stellamar or MCS 2500 subrack systems; the SIM401 is a plug-in serial interface card for these platforms.
- Dual independent serial channels (RS-232 and RS-485) allow simultaneous connection of two external devices without additional interface hardware.
- 24 V DC supply aligns with standard marine control power distribution.
- Screw-terminal field connections and onboard jumpers for termination/addressing simplify installation and network adaptation.
- LED diagnostics for power and channel activity support rapid verification of communication status during integration.
- Intended for shipboard serial devices (navigation sensors, governors, tank systems, PMS interfaces) that must exchange data with the central automation network.
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
|---|---|---|
| Host system | Stellamar and MCS 2500 marine automation systems | Plug-in module for the corresponding subracks |
| Power | 24 V DC | Standard marine control supply |
| Serial interfaces | RS-232 and RS-485 (independent channels) | External device settings (baud rate, parity) must match module configuration |
| Field wiring | Green screw terminal blocks | Shielded cables recommended; proper grounding required |
| Configuration | Jumpers for termination and addressing | Must be set according to system topology |
Dimensions, Mounting & Connection Notes
The SIM401 is a plug-in module intended for the subracks used in MCS 2500 and Stellamar systems. Field connections are made via green screw terminal blocks labelled J1–J5 for power and serial signals. Onboard jumpers provide termination and addressing options. Status LEDs indicate power and channel activity. Exact overall dimensions and mass vary by revision; typical reported weights fall in the 420–520 g range.
FAQ
What is the SAM Electronics SIM401?
It is a dual serial interface module that provides two independent RS-232 channels and two independent RS-485 channels for use in Lyngso Marine / SAM Electronics marine automation systems.
Which systems does the SIM401 belong to?
It is designed for the Stellamar and MCS 2500 automation platforms.
What power supply does it require?
The module operates from a 24 V DC supply.
How are field devices connected?
Connections are made through green screw terminal blocks (J1–J5). Jumpers on the board set termination and addressing.
What is the primary function of the dual channels?
Each channel can interface independently with external serial equipment such as navigation sensors, governors, or monitoring devices, allowing simultaneous data exchange with the central automation network.
Are status indicators provided?
Yes. LEDs show power status and transmit/receive activity on the serial channels.
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