Home | Automatic Mains Failure Units | DKG-209 Automatic Mains Failure Unit


The DKG-209 is a comprehensive AMF unit for single genset standby operations.

It monitors mains phase voltages, frequency and phase rotation, runs the genset in case of mains failure and transfers the load between mains and genset.

When the genset is running, it monitors the engine and the alternator and shuts-down the genset in case of failure. 

The unit is able to initiate modem calls and send SMS messages through optional external modem.


The unit provides a comprehensive set of digitally adjustable timers, threshold levels, input and output configurations and operating sequences. All programs may be modified via front panel pushbuttons, and do not require an external unit.

Last 100 faults are stored in the event log file. The event log includes not only the engine-hours information, but also a comprehensive list of measured genset parameters at the time that the fault has occurred.

The WINDOWS based RAINBOW program allows remote monitoring and control. 

True RMS measurements

Dual genset mutual standby operation

Event logging with engine run hours stamp and measurements

Field adjustable parameters

Logic level serial port

Free MS-Windows Remote monitoring SW

GSM and PSTN modem support

GSM SMS message sending on fault

MODBUS communications

Multiple language support

Customer logo display capability

16 Amp contactor outputs

1 Amp DC semiconductor outputs

Configurable analogue inputs: 3

Configurable digital inputs: 5

Configurable digital outputs: 1

Total digital outputs: 5

Plug-in connection system

Product Brochure

User Manual

Parameter Setup and Monitoring Software: Rainbow

UL-CSA Certificate

Watertight Gasket

Screw Type Plastic Bracket

Spring Plastic Bracket

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