DKG-307 User Manual V-37 (01.03.2012)
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The unit is able to provide a relay output in order to drive the fuel pump motor. The fuel pump
is used in order to transfer fuel from the large capacity main tank (if exists) to the genset daily tank
which is generally integrated in the chassis and has a limited capacity.
The fuel level reference is measured through the analog fuel level sender. When the
measured fuel level falls below Fuel Pump Low Limit parameter, the fuel pump relay output will
operate. When the fuel level reaches Fuel Pump High Limit parameter, the relay will turn off. Thus
the chassis fuel tank level will be always kept between Fuel Pump Low Limit and Fuel Pump High
Limit parameters.
The fuel pump relay function may be assigned to spare relays using Relay Definition program
parameters. Also relays on an extension module may be assigned to this function.
The unit offers an optional SIMULATE MAINS signal input. The SPARE-2 digital input may be
assigned as Simulate Mains using program parameter P_084.
It is also necessary to set the ACTION program parameter of the related input to 3 in order to
prevent any alarms generated from this input.
The SIMULATE MAINS signal may be a NO or NC contact, switching to either battery positive or
battery negative. These selections are made using the programming menu.
If the Simulate Mains input is defined and the input signal is active, the mains phases are not
monitored and supposed to be inside limits. This will prevent the genset from starting even in case of a
mains failure. If the genset is running when the signal is applied, then usual Mains Waiting and
Cooldown cycles will be performed before engine stop. When the SIMULATE MAINS signal is present,
the front panels mimic diagram‟s mains LEDs will reflect the mains voltages as present.
When the signal is passive, the unit will revert to normal operation and monitor the mains
voltage status.
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