26 GC250 Technical Manual
EAAM057608EN
5.4
Basic diagram for switching off when de-energizing
The static outputs
T.03
and
T.04
are configured as per default for the connections of starter
motor (
START
) and of fuel valve (
FUEL SOLENOID).
If not used to command the engine (e.g.
With CAN-BUS engines), the two outputs are re-configurable from parameter to other
purposes.
The status of the START and FUEL outputs is displayed on page
S.06 (0= output
inactive, 1= output active)
The outputs functions configured by default are the following:
Terminal
Function
T.03
DOF.1005
– “Engine start command”.
T.04
DOF.1003
– “Fuel temperature"
In detail:
5.4.1
T.03 START Command for the engine starter motor
Positive output at +BATT Integrated internal diode for damping opening over voltages. This
terminal shows the battery voltage present on terminal
T.02
; although one is already present
inside, with particularly inductive loads (remote control switches, electromagnets, etc.)
it is
necessary to use a damper diode for opening over voltages
.
ATTENTION!
: for currents above the nominal value or for inductive loads with
values higher than 500mH
it’s necessary to use an external relay.
The controller activates this command when motor start is required and deactivates it
automatically within 200-300ms from the instant when it recognizes the motor started state.
If this command is not necessary (for example with CAN-BUS interface engines), the output
can be configured for other purposes by means of the parameter P.3001 , refer to par. 5.6.2
and [1].
5.4.2
T.04 FUEL SOLENOID Fuel solenoid command
Positive output at +BATT Integrated internal diode for damping opening over voltages. This
terminal shows the battery voltage present on terminal
T.02
; although one is already present
inside, with particularly inductive loads (remote control switches, electromagnets, etc.)
it is
necessary to use a damper diode for opening over voltages
.
ATTENTION!
: for currents above the nominal value or for inductive loads with
values higher than 500mH it’s necessary to use an external relay.
The output is configured by default to control the fuel interception solenoid valve with de-
energizing arrest systems (see below); if not used for this purpose (for example in the case of
engines with CAN-BUS interface), it can be reconfigured to serve other purposes by means of
the parameter P.3002, refer to par. 5.6.2 and [1].
There are two different ways to stop the engine:
Drop-down stop system
