PIN AS 8G3733 - Caterpillar

If the "Engine Operating State" is set to "Hard Wired", the EMCP 4.3 and EMCP 4.4 can be used for monitoring and control of "Mechanical Unit Injector" (MUI) engines. With the absence of an engine ECM, the EMCP 4 uses relays connected to digital outputs to control the start/stop function. With the absence of an engine ECM, the EMCP 4 uses relays connected to analog inputs for the monitoring of critical engine parameters.ReferenceFor 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 is typically used to energize the switch for the starter motor that is used to crank the engine.
Relay output 2 is typically used in order to provide a run signal to the engine governor.
Additional relay output (configured for rated speed) gives permissive signal to the engine governor to ramp up to rated speed.Note: The functionality of relay output 1 and relay output 2 can be configured.MUI engine parameters monitored directly by EMCP 4:
Engine Speed (via magnetic pickup input)The EMCP 4.3 has three analog inputs. The MUI engine analog input 1 and analog input 2 are set at the factory. Analog input 1 and analog input 2 are available for customer use. Analog input 3 may be available for customer use.The EMCP 4.4 has the additional analog input 4. Input 4 is available for customer use.
Oil Pressure (via analog input 1)
Coolant Temperature (via analog input 2)