PRODUCT INFORMATION
INDEX
DATE
Dep. 2
IC-G-D-33-002e A
July 2013
DESCRIPTION OF THE GIS IGNITION SYSTEM
5/7
The module also has three digital inputs to carry out the following functions:
-
Start/Stop. This signal allows the ignition to be enabled/disabled. If a high level signal is sent (2.8 – 32 V)
the ignition is activated, while if a low level signal is sent (0- 0.8 V) the ignition is deactivated. The signal
has a maximum input current of 20 mA.
-
Reserved/GPI: The General Purpose Input (GPI) can be configured by software and used for several
functions. With
Kohler
engines, this input allows us to reset the CAN communications module with the
engine in operation (1 second pulse at high level) or completely reset the ignition unit when the engine is
stopped (5 second pulse at high level).
-
Schedule A/B: This digital input allows us to select from two previously configured ignition schedules. The
unit allows us to programme two ignition schedules (Schedule A and B) and this digital signal allows us to
select one of the other (low level (0 - 0.8 V) for schedule A and high level (2.83 - 2 V) for schedule B).
The signal has a maximum input current of 20 mA.
With
Kohler
engines, this input is not connected, meaning that the unit allows operates with ignition
schedule A.
Analogue/Digital Outputs
The GIS ignition unit has two digital outputs that provide information on the status of the unit. They are potential
free contacts with a common return that is not referenced (maximum 32 VDC, 100 mA):
-
The Go/NoGo contact closes when the unit is sending ignition signals to the coils. This output can be
used to activate the security loop when there is an emergency engine shut-down.
-
The GPO (General Purpose Output) contact is totally configurable by software. We can configure both
those situations when we want it to be activated and the output logic itself. With
Kohler
engines, the
output is normally configured as closed, to be activated (open) only when the unit shows a serious error
that results in ignition shutdown.
The ignition module can generate a pulse sequence signal that allows it to control another piece of equipment,
such as the Detcon. This signal is known as the ASO (Auxiliary Signal Output) and can be connected with two
wires to the equipment in question. It is a TTL level (5V) with a maximum intensity of +- 10 mA.
With
Kohler
engines, this signal is used to control the Detcon, meaning that the ignition unit must be connected
to the Detcon with a 2-wire screened cable.
Visualisation LEDs
There are 6 LEDs on the front of the ignition module that provide information on the status of the unit:
-
The “Status” LED indicates the status of the unit. The LED is always flashing and its colour changes
according to the status of the unit. If the unit has an error, the LED is red, if there is a warning, the LED is
orange and the LED is green if there is no error or warning. When the LED flashes quickly, the unit has a
hardware problem (“critical error”).
-
The “Firing” LED always activates when the unit is sending. The light is green.
-
The pickup LEDs activate whenever the module receives a signal from a pickup. All the lights are green.
With
Kohler
engines, they are as follows:
o
Pick up 1: Hall effect camshaft pickup
o
Pick up 2: magnetic reset pickup
o
Pick up 3: crankshaft tooth pickup
-
The GPO LED activates when the GPO contact is closed. With
Kohler
engines, due to the fact that this
output is normally configured with closed logic, the LED should always be lit unless the unit is in error
status.
2.5.5
O&M_2.002211.810_A_10_2016
