BEARING 3W2420 - Caterpillar

Digital Outputs
The EMCP 4.3 and EMCP 4.4 support 16 programmable discrete sourcing outputs. The outputs can provide 200 mA per channel. The voltage of these outputs will be the source voltage to the EMCP 4 plus a voltage drop of approximately 1 VDC. The common signal is "Battery" (-). This user supplied reference should be wired to pin 118 on the 120-pin connector of the EMCP 4.3 and EMCP 4.4.The EMCP 4.4 has an additional programmable discrete sourcing output capable of driving 200mA.The EMCP 4.4 additionally supports two dedicated digital sourcing outputs capable of driving 300mA per channel. The EMCP 4.4 additionally supports a dedicated digital sourcing output capable of driving 100mA for that channel.The 300mA outputs are reserved for "CB Close Command" (DDO #2) and "CB Trip Command" (DDO #3). The 100mA output is reserved as a paralleling output (HWDBA #5/DDO #1).The outputs can be programmed for four different states:Disabled - When an output is disabled, the output remains in the inactive state. Display and SCADA will show the status of the output as disabled.Status or Command - Used to set a status or command from the EMCP 4 controller internal logic.System Event - Used to set system events. The trigger for system events can be configured. System events can be triggered by internal events or events from other devices on the CAN network.SCADA Datalink - Activates outputs based on a command sent via the SCADA data link.Outputs can be configured by using the EMCP 4 display. For some of the setpoints, level 2 or level 3 access is required. This section will assume that the correct level 2 or level 3 access has already been obtained. Alternately, Cat ET can be used to configure these outputs.The programming of the digital and relay outputs starts by selecting a "Usage Type". The rest of the programming is dependent upon what usage type is selected. Illustration 1 summarizes the paths possible for programming digital and relay outputs.Note: If the engine operating state is configured as hardwired, then "Relay Output #1" must be programmed to "Starter Motor Relay" and "Relay Output #2" must be programmed to "Fuel Control Relay".
Illustration 1 g02266973Any output can be configured for any one of the following status parameters.
Table 1
Run Mode
Auto Mode
Stop Mode
Package Not in Auto
Fuel Control Relay(1)
Starter Motor Relay
Start Aid
Disable Auxiliary AC Supply
Crank Alert
Engine Start Initiated
Engine Started
Rated Speed
Voltage and frequency within limits
Engine in cool down
Package Waiting on Delay on Stop
Horn Control
Common Warning
Common Shutdown
ECU Fault Reset
Air Shutoff
Breaker #1 Trip (4.3 only)
Breaker #2 Trip
Programmable Cycle Timer Output #2
Programmable kW relay Trip #1
Programmable kW relay Trip #2
Common Alarm