BOLT 7S4440 - Caterpillar

The Marine Monitoring System is an engine protection and an engine monitoring system. The Marine Monitoring System is for 3600 marine engines.The Marine Monitoring System consists of an off engine mounted Marine Engine Control Panel and the engine mounted sensors and associated wiring.
Illustration 1 g00562591
Marine Engine Control Panel
The Marine Engine Control Panel contains the following components:
A minimum protection backup relay system
Control switches for starting the engine
Control switches for stopping the engine
The engine speed switch
A Programmable Logic Controller
Flex Input/Output modulesDisplay
A display on the programmable logic controller provides the engine status for the operator.Control Switches
The following controls are located on the Marine Engine Control Panel:
"EMERGENCY STOP" button
"OFF/RESET-LOCAL-REMOTE" switch
"PRELUBE-RUN-START" switch
"FUEL CONTROL" switch
"HORN SILENCE-LAMP TEST" switchThe following controls depend on the option of governor that is selected.
"IDLE/RATED" switch
"SPEED CONTROL" potentiometer
"RAISE/LOWER" switchWeight of the Marine Monitoring System
The 179-8801 EMPC Electronic Control and the 179-8802 EMPC Electronic Control have a combined weight of 90 kg (198 lb).The 147-5676 Instrument Panel Mounting has a weight of 86 kg (190 lb).Programmable Logic Controller
The programmable logic controller provides complete monitoring and control for a Caterpillar 3600 Engine. The basic modular programmable logic controller consists of the following components:
Power Supply
Central Processing Unit
Chassis
Input Modules
Output Modules
Engine Speed SwitchThe programmable logic controller is the computer that conducts the following engine functions:
Control
Monitor
ProtectionThe CPU module in the programmable logic controller contains the software that controls the behavior of the programmable logic controller.Power Supply
An input of 24 VDC is typically provided by a battery set. The power supply delivers a voltage for the following components: the CPU, the chassis and the input and the output modules that are mounted on the chassis. The power supply has the following features:
Isolation from ground
Ability to handle lower battery voltage
Immunity from noiseCPU Module
The CPU module provides the intelligence for the system. The program for the system resides in the CPU module.Discrete Input Modules
The discrete input modules consist of digital input modules. Digital modules are used in order to determine whether a circuit is ON or OFF.Analog Input Modules
The analog input modules are in the following list:
Thermocouple Module
Resistance Temperature Detectors Modules
4-20 mA ModulesAn analog input module has a voltage input that can vary on a fixed range. Discrete Output Modules
The discrete output modules have 16 digital outputs. Control of voltage is provided by the output modules. A module provides power for the following list of functions: energizing the lamps, energizing the relays, energizing the fuel shutoff solenoid and energizing the air shutoff solenoid.AMCI Module
The module is used in order to measure frequency. The PLC converts the frequency to an RPM. The following inputs are provided to the module:
Engine Speed Sensor
Turbocharger Speed PickupEngine Speed Switch
The speed switch accepts a signal from the engine speed sensor. The engine speed sensor is mounted on the engine. The speed switch determines the engine speed from the signal. The speed switch provides contacts for the following list of conditions:
Termination of Cranking
Engine Oil Step Pressure
Engine Overspeed
Crank Terminate Time Delay
Engine Speed Switch Failure Indicator
75% Verify ActiveEngine Mounted Sensors
Engine mounted sensors provide the programmable logic controller with engine