BOLT 6I0839 - Caterpillar

EMCP 4.1 and EMCP 4.2 support three 2-wire (plus shield) analog inputs. None of the analog inputs are dedicated to specific functions. The analog inputs are individually selectable as either "Voltage" or "Resistive Sender" inputs for interface to senders and customer signals. The modes of operation are described below:
Voltage mode: 0-5 V with software-selectable sub ranges. The input impedance is a minimum of 10k ohms, and a maximum of 1M ohms. The analog input return signals must be tied to battery negative external to the controller.
Resistive Sender (VDO type motor) Mode: 5-2000 Ohms with software-selectable nonlinear maps. Accuracy is 1% or 0.5 ohms accuracy, whichever is worse. The analog input return signals must be tied to battery negative external to the controller.The analog inputs have a 5 VDC common non-isolated power supply capable of supplying up to 100 mA of current, with overload protection. This supply is to be used to provide power to sensors if required by the source power pin and analog input returns. The negative side of this supply is battery negative.Analog inputs programmed to monitor pressures should be wired to sensors that read gauge, not absolute pressure, unless absolute pressure is desired.For analog inputs, the data range can be positive or negative, but event thresholds are only positive. Therefore, to prevent nuisance alarms for low warnings, disable the "Event Response Configuration" if data is acceptable to be negative.The first and second analog inputs are configured by default for non-electronic engines. The inputs are to monitor engine oil pressure and engine coolant temperature, respectively, and are protected by level 3 security. The third analog input by default is protected at level 2 security.Alternately, Cat ET can be used to program these set points.Note: If the analog inputs are set to "DISABLED", then any sensor faults or events will not be broadcast or annunciated on the network.Note: If more than one analog input is configured for the same physical quantity (that is, the set point "Analog Input Data Identification" matches between two "Analog Inputs"), then the higher numbered "Analog Input" value will be displayed on the "Engine Overview" screen. The following is an example. If both "Analog Input #2" and "Analog Input #3" are configured for oil temperature, but the sensor is connected only to "Analog Input #2" (and "Analog Input #3" is left open), a display of "****" diagnostic will result. The "Engine Overview" screen will display the value from "Analog Input #3". Warnings and shutdowns will be monitored for both analog inputs. When troubleshooting inputs, always make sure to check for configuration conflicts.The analog inputs are not used for electronic engines that use ADEM A3, A4, or newer, engine ECM. On the electronic engines, the engine oil pressure sensor and the engine coolant temperature sensors are wired to the engine ECM. On the electronic engines, the engine oil pressure sensor and the engine coolant temperature sensors are not wired to the generator set control.Inorder to receive the sensor information from the data link instead