COMPONENTS AT THE REAR | PAGE 9
3.1.13 WATER TEMPERATURE INPUT (ATA) (4)
This is a digital input that is activated at low level. It is connected to the thermo-
stat of the engine coolant temperature and it activates the high-water -tempera-
ture alarm.
3.1.14 LOW OIL PRESSURE INPUT (BPA) (5)
This is a digital input that is activated at low level. It is connected to the pressure
switch of the engine oil pressure and it activates the low-oil-pressure alarm.
3.1.15 FUEL RESERVE INPUT (RC) (6)
This is a digital input that is activated at low level. It is connected to the ume of
the fuel tank and it activates the reserve fuel alarm. The action that should be
taken after the alarm is detected can be programmed (see section 3.2).
3.1.16 AUXILIARY INPUT (AUX) (7)
This is a digital input that is activated at low level. You can connect any type of
sensor that closes a contact when it is activated. It emits a visual signal through
the yellow AUXILIARY (AUX) alarm LED.
3.1.17 EXTERNAL START-UP INPUT (LT) (8)
This is a digital input that is activated at low level. It is connected to a free volt-
age contact (LT) which is used to order the start-up sequence of the generator
set when the control unit is in automatic mode (see section 4.2).
3.1.18 EMERGENCY STOP INPUT (PEM) (9)
If this input is activated, it stops the generator set immediately. This terminal is
connected to negative through an emergency button with an NC (Normally Closed)
contact. To activate this input, the contact has to be opened. When it has been
opened, there is no longer a negative in the control unit input.
3.1.9 STOP BY DE-EXCITATION (PD) (18)
The output associated with this terminal is activated when the genset must be
started and it is deactivated when the control unit orders it to stop.
3.1.10 ALTERNATOR VOLTAGE INPUT (GEN) (1)
This input is used to read the frequency by generator set. To do so, one of the
phases of the generator set is connected to this terminal, while the neutral is
connected to the GCOM terminal. The reading is always performed between
phase and neutral, never between phases. The typical effective voltage for this
input is 220V; it is possible to reach a maximum effective value of 280V.
3.1.11 PICK-UP INPUT (PCK) (2)
This input is used to read the frequency by Pick-Up. To do so, one of the cables is
connected to this terminal, with the signal provided by the magnetic Pick-Up,
while the other one is connected to the GCOM terminal of the control unit. These
inputs have no polarity.
3.1.12 COMMON VOLTAGE INPUT OF THE ALTERNATOR AND PICK-UP (GCOM) (3)
This input is common and is used to connect the neutral of the generator set, if
the frequency reading is performed by generator set, and one of the signal leads
of the Pick-Up, if the reading is performed using this type of sensor.
You can only use one of the two types of frequency readings, never both of them
at the same time. Use the conguration software to choose between the two
reading methods.
NOTE
It is very important to connect only one of the two frequency reading inputs. In
other words, if you connect the phase and the neutral of the alternator to the
generator’s control unit input, you cannot connect the wires of the Pick-Up to the
corresponding input and vice versa.
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