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DNV certified genset controller for marine power management systems


DNV certification and high reliability

GC600Neptune is the latest genset controller of Sices with the DNV certification. Based on the already successful range of GC600, MC200, BTB200 and RN200 controllers, however, with enhanced coating and sealing to resist harsh marine environment, which along in 5 years of warranty.

Synchronization and Load-sharing

GC600Neptune provides all features of genset monitoring, control, protection and the active regulation of voltage and frequency to ensure quick synchronization of gensets on the bus to keep them stable at the set voltage and frequency while gensets share their active and reactive loads.

Power Management System

GC600Neptune comes with all necessary management of marine power systems:

  • Fully automatic start and synchronization of a genset when a trip or a pre-warning of a supplying gensets occurs
  • Load-dependent start & synchronization of gensets
  • Load dependent unloading & stop of gensets
  • Automatic or manual change of gensets’ priorities
  • Reduced total fuel consumption by GC600Neptune‘s power management or synchronized mains supply during a harbor operation (shore connection) by MC200Neptune, the shore connection controller
  • Combined operation of shaft generators and AUX generators for the minimum fuel consumption
  • Bow thruster power reserve activation or trip off unnecessary load, depending on a site configuration
  • Support of multiple shore connections by multiple MC200Neptune within the power management system

All-in-one controller to fit any application

The controller has been fully equipped from a factory, i.e. neither optional hardware card nor software module is needed to purchase. The GC600Neptune even comes with ten of predefined application modes, i.e. any mode between a single-genset application to a multi-genset application along with paralleling to mains during a shore connection by MC200Neptune controller.

Ensuring power supply

There is available manual/emergency operation and manual power management, also supported by controller’s in-built DROOP mode or by direct connection to a speed governor/AVR, based on e.g. a hardware signal of the controller’s watchdog.

Easy to operate

GC600Neptune is equipped by a large 4.3” color dimmable display of three preset color schemes with an option to hide unnecessary pages and the dimmable LED.

High measurement accuracy

GC600Neptune uses 12 bit A/D converter resulting in very accurate measurement of electrical and analog values, with e.g. 1% of AC voltage measurement error or 0.3% of AC current measurement error.

A part of ship’s IAS

The USB, RS232, RS485 (insulated) and Ethernet communication interfaces provide full integration of GC600Neptune and MC200Neptune controllers to the Integrated Vessel Automation System.

Accomplishment of various site requests

GC600Neptune comes with in-built set of powerful PLC functions to manage any special request of the site.

Free PC software tools of Sices

Configuration of GC600Neptune can be either done by controller’s keyboard or by BoardPrg4 software tool. Similarly, any complex PLC diagram can be easily created with the SicesPlcEditor software. On the bridge, free SCADA software of SicesSupervisor3 covers monitoring and control of Sices controllers and also any third party Modbus instrument too.
All free to download at

Embedded functions

  • Engine diagnostic code
  • Periodical test
  • Real Time Clock with internal rechargeable Lithium battery
  • Fuel pump management
  • Events log
  • Pre-glow and coolant heater management
  • Remote start and stop
  • Override function
  • Hours counter for maintenance schedule
  • Daily counter with embedded calendar for the maintenance
  • Embedded horn alarm
  • Engine speed measurement by pick-up, frequency or W
  • Programmable by PC or using the keyboard of the controller
  • Remote firmware update
  • SMS communication
  • SNMP, NTP (for the automatic clock update), DNS and
  • DHCP support
  • N. 1 Threshold as load shedding. Additional logics available with the PLC functions
  • Internal active and reactive powers regulation
  • Internal load-sharing
  • Internal synchronizer
  • Powerful load management suitable for plants composed by gensets of different powers
  • Insulated CAN interface for PMCBUS application (LOAD–SHARING and parallel management)
  • Up to 16 of gensets (by e.g. GC600Neptune controller) connected together
  • Up to 16 of MC200Neptune shore connection controllers are supported
  • Up to 8 of BTB200 bus-tie controller are supported
  • Up to 4 alternative configurations
  • Easy plant configuration
  • N. 3 Levels of power reserve for unexpected changes of load request
  • Ramp modulations for load and unload

Default display languages:

Additional languages downloadable with boardprg tool:

  • Supply voltage: 7…32 Vdc
  • Power consumption: typical less than 2W
    (Auto mode, Standby, AMF active, LCD Lamp Saving active)
  • Operating frequency 50Hz or 60Hz
  • LCD with backlight
  • Operating temperature: -25 °C to +65 °C
  • Storage temperature: -30 °C to +80 °C
  • Protection degree: IP65 (gasket included)
  • Weight: 600gr
  • Overall dimension: 244 (W) x 178 (H) x 83 (D) mm
  • Panel cut-out: 218 (W) x 159 (H) mm
  • Specific function for French markket EJP / EJP-T
  • Compliant with DNVGL-CG-0339

Location class

  • Temperature: D
  • Humidity: B
  • Vibrations: A
  • EMC: A
  • Enclosure: B

Safety: built in conformity to EN61010-1


  • Engine start inhibition
  • The load is forced to be supplied from the mains
  • When the engine is running and the operating mode is changed to ‘OFF’ position, the engine shutdown sequence is activated
  • Reset of all alarms
  • Enable parameters change (programming)


  • Access to all programmable parameters
  • Programming access can be controlled by means a three-level password
  • Some parameters can be changed even if the engine is running


  • The genset protection functions are activated
  • The starting command is automatically disabled when the engine is running
  • MCB and GCB pushbuttons are enabled when the genset is in operating range
  • Their function depend on the operating mode selected
  • Manual synchronization can easily accomplished by built in function


The operating sequence depends on the selected application:
Single Prime Mover, Stand-by, Stand-by and Short Time Parallel, Single Parallel to Mains, Multiple Prime Mover, Multiple Parallel to Mains.


  • Automatic start for testing operations with safety protections enabled
  • Test can be made unloaded, loaded or in parallel to mains
  • Upon mains failure, the load is immediately supplied by the genset

Mains/Bus voltages

  • L1-N, L2-N, L3-N, L1-L2, L2-L3, L3-L1
  • True RMS measure
  • Lx-N max. voltage < 300Vac cat. IV
  • 100/400V Nominal voltage input reading available with auto adjustment

Generator voltages

  • L1-N, L2-N, L3-N, L1-L2, L2-L3, L3-L1
  • True RMS measure
  • Lx-N max. voltage < 300Vac cat. IV
  • 100/400V Nominal Voltage input reading available with auto adjustment

Generator currents

  • L1, L2, L3, N (*)
  • True RMS measure
  • Nominal max. current: 5Aac and 1Aac
  • Integrated CTs
    (*) Neutral generator current as alternative to differential protection or to be used for measure mains power from CT (Standard) or Tore (option)

Generator and mains frequency meter

Resolution = 0.1 Hz. Accuracy = ±50ppm, ±35ppm/°C (typical)

Battery voltmeter

Resolution = 0.1V

Oil pressure gauge

VDO 0-10 Bar, VDO 0-5 Bar, V rable curve based on sensors available)

Coolant or oil thermometer

VDO, Veglia, BERU (configurable curve based on sensors available)

Fuel level

VDO, Veglia, BERU (configurable curve based on sensors available)

Engine revolution counter

By pick-up. Programmable teeth number. Same input can be used by W signal


For the measure of the alternator battery charger voltage

Active and reactive power, power factor, are available as total measure and also for each single phase. Power and currents maximum reached values are stored with date and time. Additional analogical measures related to the engine are available in case of engines with CANBUS J1939 interface.


  • N. 1 USB Function for the configuration
  • N. 1 RS232 Serial port Modbus RTU (external modems can be connected here)
  • N. 1 RS485 Insulated serial port Modbus RTU
  • N. 1 RJ45 Port as Ethernet interface TCP/IP
  • N. 1 Insulated CANBUS J1939 and MTU MDEC interface
  • N. 1 Insulated CANBUS (PMCBUS) for the load sharing

As option

  • Rewind - GPRS/GSM/GPS Device
  • PSTN/GSM Modem

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