Main Logic Circuit Board; For Units Equipped With 3Rd Party Marine Option - Kohler 500EOZCS Operation

1.9.2

Main Logic Circuit Board

The main logic circuit board provides the connection
sockets to connect
engine/generator, input/output connections, optional
I/O module kit, and circuit protection fuses.
Circuit Board Connections
P1 (35-Pin) Connector for engine/generator wiring
harness.
P2 (14-Pin) Connector for sensor input connections
and relay driver output connections.
P3 (8-Pin) Connector for generator set output voltage
connection and paralleling bus voltage sensing
connections.
P4 (Ethernet) Connector connects to a network
communication line.
1.9.3 For Units Equipped with 3rd Party
Marine Option
Additional engine sensors are provided to satisfy 3
party approval requirements.
redundant sensors is described below. Every ECM
handles their respective sensor readings and values
independently and the ECM may send warnings or
cause shutdowns on their own. Refer to the respective
Engine ECM documentation for unique handling.
All units will have two oil pressure sensors. If the
D
engine is equipped with an ECM, the primary oil
pressure sensor (#1) will go to the ECM and the
primary oil pressure readings are derived from CAN
communications. If the engine is not equipped with
an ECM, the primary oil pressure sensor connects to
the genset controller at one of the auxiliary analog
inputs and primary oil pressure readings will be
measured directly by the controller. On all units, the
secondary oil pressure sensor (#2) connects to the
genset controller at one of the auxiliary analog inputs
and secondary oil pressure readings will be
measured directly by the controller.
All units will have a single coolant pressure sensor.
D
This sensor connects to the genset controller at one
of the auxiliary inputs and coolant pressure signal will
be monitored directly by the controller. Low coolant
pressure and/or loss of coolant pressure readings will
cause a warning only (not a shutdown).
All units will have a single oil temperature sensor.
D
This sensor connects to the genset controller at one
of the auxiliary inputs and oil temperature signal will
be monitored directly by the controller.
TP-7126 5/20
the controller to
Handling of these
All units will have two coolant temperature sensors. If
D
the engine is equipped with an ECM, the primary
coolant temperature sensor (#1) will go to the ECM
the
and the primary coolant temperature readings are
derived from CAN communications. If the engine is
not equipped with an ECM, the primary coolant
temperature sensor connects to the genset controller
at one of the auxiliary analog inputs and primary
coolant temperature readings will be measured
directly by the controller. On all units, the secondary
coolant temperature sensor (#2) connects to the
genset controller at one of the auxiliary inputs and the
secondary coolant temperature signal will be
monitored directly by the controller.
When two sensors are installed (oil pressure and
D
coolant temperature), separate warning messages
are initiated for each sensor when a warning limit is
exceeded. Should either sensor provide a reading
that violates a shutdown limit, a shutdown occurs
regardless of the other sensor reading. If either
sensor signal is lost, a Loss of Signal (LOS) warning
will be initiated. If both sensor signals are lost, a Loss
of Signal (LOS) shutdown occurs.
rd
Section 1 Specifications 43