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GCM02-MT-ING4 NEW.doc c/02 04/03/2003 ENG Page 18 of 57
2.5 VARIOUS FUNCTIONS AND UTILITIES
2.5.1 CC12 AND 24V POWER SUPPLY CIRCUITS
The M02 module is arranged to operate at 12 and 24V. By bridging connections 3 and 4 all the functions are adapted, including the
control threshold of the battery charger for the 12V voltage and the same without bridge for the 24V power supply voltage.
The first level safety device against excessive power supply voltages are fitted in the MP02 module: it is capable of operating constantly
up to 40V, it can also withstand transitory voltages above 250V. A second level safety device is also fitted against inverted polarity of the
power supply, which prevents the circuits in which it is encountered from being powered. Any anomalies cause the F1 fuse to trip (25A)
that cuts-out all the electronic circuits.
WARNING if, after having powered the control panel the battery LED should fail to light up, check the POLARITY OF
THE BATTERY before operating any commands. Possible connection errors could cause electronic anomalies in the MP02
module if commands are operated with the poles inverted.
2.5.2 COMMAND RELAYS
Two 30A relays command the starting and stopping and one 16A relay the utilities 15/54. Two 10A relays with free contacts command
the contact makers of the mains and generator (CG-CR) switching. An additional relay with contact that can be configured in NA/NC is
pre-arranged to command the opening of the generator switch. It is designed to trip the differential or for overloads.
2.5.3 MOTOR STARTED READING
This requires no external signal. The control is achieved on the frequency of the generator. During the motor starting phase, once 540
rpms are reached which correspond to 18Hz programmable, the 1
st
motor started signal is received. If due to an anomaly the generator
is not powered ( at least 7V) the starting phase is stopped once and for all by the second safety control established when the oil is
pressurised, which triggers a delay of 3 seconds that stops the starting phase.
N.B. For the safety engine, if the oil pressure switch is not connected, the gen.set can not to start
2.5.4. MOTOR PRE-HEATING
A feeding is foreseen for the engine preheating system; the M02 has a transistorised command which controls a contactor in direct
current to deactivate automatically the preheating when the gen-set is running or above the max programmed temperature (OFF), and to
activate it automatically when the engine temperature is inferior than least value (ON) (this function is enabled only when the
temperature transducers is connected to terminal 16).
3 4 3 4
12 Volt 24 Volt
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