Integrated Engine Control
The M2000 automates the entire engine start and stop sequence. It accepts a start signal either from a front-panel button or an external remote contact. The unit can be configured to perform multiple start attempts (up to 6 attempts) with adjustable crank and rest periods. It detects a successful start via a signal from an external tacho relay or directly from a magnetic pick-up, disengaging the starter at approximately 33% of nominal speed. A configurable stop delay allows for generator circuit breaker trip and engine cool-down before final shutdown.

Comprehensive Engine Protection
While running, the M2000 continuously surveys critical engine parameters to prevent damage. It features 9 configurable inputs that can be set as either shutdown or alarm channels. These typically monitor:

• Oil Pressure

• Coolant Temperature

• Overspeed (via internal speed measurement)

• 5 additional auxiliary alarms

The unit includes a valuable circuit check (cable monitoring) feature for sensor inputs, which provides a special indication if a sensor wire breaks, ensuring fail-safe operation.

Clear Indication and Communication
The front panel features bright, dual-color LEDs for each of the 10 indicating channels, with windows for custom alarm identification labels. A large, clear legend card can be printed and inserted behind the front plate. For system integration, the M2000 includes an RS485 interface with MODBUS RTU protocol, allowing seamless communication with HMIs, PLCs, and SCADA systems for remote monitoring and control. An RS232 interface is also available for easy PC-based configuration using SELCO’s software.

Rugged Design for Harsh Conditions
Built to withstand harsh marine and industrial environments, the M2000 features a compact, flush-mounting design (144x144mm) with a depth of only 35mm. It operates on a wide 12-24V DC supply and is protected against vibration, humidity, and temperature extremes. Every unit undergoes a 50-hour burn-in test before shipment to ensure the highest reliability. It is type-approved by all major marine classification societies.

One of the key operational features of the M1000 is its distinct visual indication logic: the first incoming alarm is indicated with a quick flashing light, while subsequent alarms flash slowly. This “first-out” indication is crucial for operators to quickly identify the root cause of a chain of events. Alarms are acknowledged via the front-panel reset button, which silences the internal siren and changes flashing LEDs to a steady state (if the alarm condition still exists). The reset sequence itself is programmable to suit specific application needs .

The unit features 10 programmable open-collector outputs, allowing for individual alarm signalling or integration with external control systems. For communication and scalability, the M1000 is equipped with an RS485 interface supporting the industry-standard MODBUS-RTU protocol. This allows multiple M1000 units to be connected to a master HMI or SCADA system, expanding the monitoring capacity to hundreds of points .

Built to last in wet and vibration-prone environments, the M1000 boasts a rugged design with an IP56 protection rating (front panel) and is certified for marine use. Configuration is flexible, available via internal DIP switches or an RS232 connection to a PC .

The relay provides fast and accurate protection against abnormal operating conditions such as reverse power, overcurrent, over/under‑voltage and over/under‑frequency. Its robust design, high immunity to electrical noise and straightforward configuration make it a preferred choice for marine switchboards, auxiliary generator sets and retrofit projects.

With a clear LED indication panel and simple front‑panel settings, the M3000 ensures reliable operation and easy maintenance. It integrates seamlessly into SELCO’s protection and control ecosystem, supporting safe generator operation and compliance with marine classification standards.