D-500 MK3 is a next generation genset controller combining multi-functionality and wide communication capabilities together with a reliable and low-cost design. The same controller provides synchronization, load share, AMF, ATS, Remote Start, Engine Control and Remote Display Panel functionalities. The module comes ready for remote monitoring over GSM or Ethernet with plug-in communication modules.

arious plug-in modules provide unlimited expansion capabilities allowing to meet any special requirement. The unit complies and mostly exceeds world’s tightest safety, vibration and environmental standards for the industrial category. Software features are complete with easy firmware upgrade process through USB port. The Windows based PC software allows monitoring and programming through USB, RS-485, Ethernet and GPRS. The Rainbow Scada web monitoring service allows monitoring and control of an unlimited number of gensets through any web browser.

Product Description


• AMF unit

• ATS unit

• Remote start controller

• Manual start controller

• Engine controller

• Remote display pane


Ethernet port (100Mbps)*


Embedded web server*

Web monitoring*

Web programming*

Central Monitoring through internet*

SMS message sending*

E-mail sending*

Central monitoring*

Modbus RTU through RS-485*

Modbus TCP/IP*


USB Host*

CANBUS-2 for inter- module comm*

USB Device

PC software: Rainbow Plus

J1939-CANBUS for electronic engines

*Optional with plug-in module


• Diesel and gas genset support

• 400Hz operation support

• 400 event logs, full snapshot

• All parameters front panel editable

• 3 level configuration password

• 4.3” 480x272pixels color LCD

• Downloadable languages

• Waveform display of V & I

• Harmonic analysis of V & I

• Synchroscope & check synch

• Allows closed transfers

• 12 configurable digital inputs

• Inputs expandable to 44

• 8 configurable digital outputs

• Outputs expandable to 40

• 7 configurable analog inputs

• 2 configurable analog outputs

• Both CANBUS-J1939 & MPU

• 3 configurable service alarms

• Multiple topologies

• 6xCT, true mains metering

• Supports up to 48 gensets

• Automatic learning/self adjust

• Direct governor & AVR control

• Voltage and phase matching

• kW & kVAr load sharing

• True soft transfer in both ways

• PLC functions

• DC genset functionality

• DPF regeneration functionality

• Peak Lopping / peak shaving

• Mains de-coupling protection

• R.O.C.O.F protection

• Vector shift protection

• Reverse power protection

• Over/under freq. Protection

• Over/under voltage protection

• Smart load management

• Smart genset sequencing

• Run/stop priority support

• Equal aging of gensets

• Base load (power export)

• Unmanaged distributed power export support

• AVR & GOV droop support

• Dead bus sensing

• Multiple automatic exerciser

• Weekly operation schedule

• Dual mutual standby with equal aging of gensets

• Manual “speed fine adjust” on selected ECUs

• Automatic fuel pump control

• Disable protections feature

• Excess power protection

• Reverse power protection

• Overload IDMT protection

• Load shedding, dummy load

• Multiple load management

• Current unbalance protection

• Voltage unbalance protection

• Fuel filling & fuel theft alarms

• Contactor & MCB drive

• Battery back-up real time clock

• Idle speed control

• Battery charge run enabled

• Combat mode support

• Multiple nominal conditions

• 4 quadrant genset power counters

• Mains power counters

• Fuel filling counter

• Fuel consumption counter

• Modem & ethernet diagnostics

• Configurable through USB, RS-485, Ethernet and GPRS

• Free configuration program

• Allows SMS controls

• Ready for central monitoring ethernet & GPRS

• SNMP v1 v2c v3 support

• Mobile genset support

• Automatic GSM geo-location

• GPS connectivity (USB&RS232)

• Dynamic DNS support

• Easy USB firmware upgrade

• IP65 rating with standard gasket