HARNESS ASSEMBLY-IMPLEMENT CONTROL 1852172 - Caterpillar

EMCP 4 can be used for monitoring and control of Mechanical Unit Injector (MUI) engines. With the absence of an engine ECM, the EMCP 4 uses relay outputs to control the start/stop function and the analog inputs for the monitoring of critical engine parameters.Reference: For EMCP 4 configuration settings that are specific to applications that use a MUI engine, refer to Testing and Adjusting, "Electronic Control Module (Generator Set) - Configure".MUI engine start/stop control by EMCP 4:
Relay output 1 (configurable) typically used to energize the switch for the starter the magnetic switch on the starter motor that is used to crank the engine.
Relay output 2 (configurable) typically used to provide a run signal to the engine governor.
More relay output (configured for rated speed) gives permissive signal to the engine governor to ramp up to rated speed.MUI engine parameters monitored directly by EMCP 4:
Engine Speed (via magnetic pickup input)The EMCP 4.2 has three analog inputs. For a MUI engine analog input 1 and analog input 2 are set at the factory and are not available for customer use, analog input 3 may be available for customer use.
Oil Pressure (via analog input 1)
Coolant Temperature (via analog input 2)